As Texas continues to face drought and water uncertainty, more homeowners are turning to rainwater collection as a smart, sustainable way to take control of their water supply. Redfin’s roundup offers insights from water professionals across the country, and we’re proud to be a voice representing resilient, whole-house systems built right here in the Hill Country.
It’s especially exciting to see a major platform like Redfin spotlight rainwater beyond the barrel, recognizing that for many homes, storing just a couple hundred gallons isn’t enough. Real resilience can mean thinking bigger, designing smarter, and planning for year-round use.
Want to know how much water your roof could collect? Curious if rainwater is a good fit for your property? We’d love to talk. Fill in the simple contact form below and a member from our team will follow up
Big thanks to Redfin for helping spread the word about smarter water solutions.
Wet vs. Dry Pipe Rainwater Systems What’s the Difference and Why It Matters
When most people think about rainwater collection, they picture tanks and gutters. But the real magic is in the design. Every day, we talk to folks who are surprised to learn that how your system is designed, especially whether it uses a wet vs dry pipe setup, can mean the difference between a reliable system and one that never quite works right.
One of the first choices we make in any rainwater system design is what type of pipe setup is best suited for your goals. Each design has its strengths depending on your land, layout, and water usage. Understanding the difference helps guide your system toward the setup that actually fits your needs. Not over-engineered, not under-sized, just right for your property, your priorities, and the way it actually rains here.
Overflowing tanks, missed collection, standing water, it all comes down to design. That’s why we say our systems are Built Smart from the Start. Good design isn’t a luxury in rainwater, it’s absolutely vital.
What is a Dry Pipe System?
A dry pipe system is a simple setup where water flows straight from the roof , through a single pipe, and into the top of a barrel or tank. This pipe empties out completely after each rain, staying “dry” between events. This is often what people picture when they think of a rainwater system.
Best For: • Small collection areas, or a portion of your roof that drains to a single gutter run • Simple layouts with a tank right next to the structure • Projects that require smaller footprints, tighter budgets, lower water demand such as tiny homes or impervious cover projects
Pros: • Lower cost and simpler installation • Overall less intensive
Cons: • Limited tank placement options • Requires above-ground “flying pipe,” which some may find unappealing (our friends at IWS have some good – and deliciously ‘bad’ photos – of dry pipe installation) • Reduced or absent first flush
What Is a Wet Pipe System?
In a wet pipe design, pipes run underground around the perimeter of the structure, allowing us to collect from multiple downspouts. In these types of systems, water remains in the pipes between rain events (staying “wet”) until it slowly drains from the first-flush. Wet pipe is far and away the most common design we install for whole house potable systems.
Best For: • Larger roofs with multiple downspouts • Whole house potable rainwater systems • Larger irrigation systems
Pros: • Cleaner final appearance (minimal above ground pipe) • Allows more flexibility in tank placement • Ideal for maximizing collection potential from the entirety of one or more structures
Cons: • Involves trenching and more materials • Requires solid design expertise to ensure water conveys from roof(s) to tank • Needs routine maintenance, learn what that looks like here
Wet vs Dry Pipe: What’s Right for Your Property?
During a consultation or site visit, our team considers the following when considering a dry vs. wet pipe system: • End use for the collected rainwater • Distance from roof to tank • Total collection area • Aesthetics and property layout, slope • Budget and long-term maintenance preferences
Wet vs Dry Pipe: The Bottom Line
Harvest Rain systems are designed for efficient water movement, long-term durability, and minimized maintenance points. Our goal is to avoid over-engineering or or designing a system that doesn’t achieve its goals. We call it Built Smart from the Start because a well-planned system performs better from day one and works harder for you long-term.
Thinking about wet vs dry pipe system is one of the first steps we take to get that right.
Have questions or curious what type of system would work best for you? Drop our local team a line here or give us a call at 512-645-2955. We’re real humans, who live and love in Texas – we’d love to help!
If you’ve ever wondered whether rainwater is safe to drink, you’re not alone. The short answer? Absolutely if it’s done right. With the right system design, treatment process, and maintenance, potable rainwater systems can provide your home with a clean, reliable, and primary water source.
Here at Harvest Rain, we specialize in potable rainwater systems for homes across Texas. This guide covers the basics of how it works, what to expect, and why more and more people are choosing rainwater over wells or municipal supply.
Yes, Rainwater Can Be Safe to Drink
Rainwater is naturally soft and free from many of the contaminants commonly found in groundwater or municipal supply like chlorine, fluoride, and heavy minerals like iron and calcium. But just like any drinking water source, it needs to be properly treated before it reaches your tap.
How We Make Rainwater Drinkable
Collection Best Practices
It all starts at the roof. Standing seam metal roofs are preferred but we do have options for those with composite shingles. First-flush systems divert the initial runoff, removing dust, pollen, and debris before the water reaches your tank.
Filtration Process
After collection, the water passes through a filtration system:
Sediment filters remove dirt and particulates
Carbon filters remove odors, organic material, and improve taste
UV light treatment neutralizes bacteria, viruses, and pathogens
Each component works together to ensure the water is safe, clean, and delicious.
Potable System Design
Our potable systems are designed for whole-home use:
Storage Tanks: Food grade potable liners
Pressurized Delivery: Pumps deliver consistent pressure to all fixtures
Maintenance Access: Easy filter changes and UV bulb replacement
Regular maintenance is crucial to ensure long-term water quality, and we offer service plans to make it even easier.
Is It Legal to Collect Rainwater?
In Texas, yes, and it’s even encouraged. Rainwater harvesting is supported by state law in Texas, learn more from the Texas Water Development Board here. The state and some counties also support rainwater harvesting through tax incentives and rebates.
Benefits of Potable Rainwater Systems
Greater self-reliance, especially in rural areas or during extended droughts
Naturally soft water helps prevent scale buildup, extending the life of appliances, and it feels noticeably better on your skin and hair too
No salts or softeners required – unlike well water, rainwater is naturally soft, saving you the hassle and cost of maintenance-heavy softening systems
Clean, delicious water – no chlorine, fluoride, or harsh minerals
Lower environmental impact by reducing strain on groundwater and municipal systems
Increased property resilience – a rainwater system safeguards your water supply during utility disruptions or weather events
A legacy of sustainability – investing in rainwater ensures our most precious natural resource remains available for future generations
Common Misconceptions
“Rainwater is dirty.” Not when collected and treated properly. Our systems are engineered to remove contaminants and deliver safe water at every tap.
“Potable Rainwater Systems must be complicated to manage.” While our systems are thoughtfully designed to be user friendly as possible, it’s true that maintaining your own water utility does require routine attention. From filter changes to seasonal upkeep, managing a potable system isn’t always set-it-and-forget-it. For a full picture of what’s involved, we encourage you to check out our Maintenance Guide.
Who Should Consider Potable Rainwater Systems?
Homeowners in rural or off-grid locations
Families looking for alternatives to well or city water supplies
Builders designing sustainable or net-zero homes
Anyone who wants full control over their water source
Want to Learn More?
We’re here to help. Whether you’re early in planning or actively building, our team can help you understand the path forward.
Or check out real stories from homeowners who’ve made the switch to rainwater.
Harvest Rain has been designing and installing potable rainwater systems across Central Texas for more than 30 years. We’re proud to help people take control of their water and love every drop.
Be winter-ready by reading our comprehensive guide to protecting your rainwater system during a hard freeze. We recommend downloading the guidebefore the threat of a freeze so you can familiarize yourself with your system, specific valve locations, etc.
In the future, if you have a property you do not stay at during the winter months, we recommend following our instructions for “Decommissioning a Rainwater System” until your return (included in the downloadable guide).
WINTERIZATION SERVICE APPOINTMENTS
Our service team offers winterization service appointments. Contact us if you are interested in having our rainwater techs come out to inspect the system, ensure you are ready for colder weather or if you’d like assistance in decommissioning a rainwater system for a property you may not be returning to until spring.
Please note: While these recommendations are intended to help you protect your rainwater system during a freeze and minimize costly repairs, Harvest Rain cannot make any guarantees against system failure(s) during extreme weather.
Small diameter = anything 2” or under. Typically these are pressurized pipes coming from your tank and/or the suction pipe to the pump if your pump is outside of the tank.
Wrap extra insulation around the main valve at the tank as this point is especially vulnerable during a deep freeze.
2. OPEN DRAIN VALVE OF COLLECTION LINE (OR FIRST FLUSH)
Keep the drain valve OPEN until the threat of freeze has passed and everything has completely thawed out (this may be several days after temperatures have begun to rise).
**WARNING: AFTER COMPLETING STEP 2 YOU WILL NOT BE COLLECTING NEW WATER. ALL WATER FROM THE ROOF WILL DRAIN THROUGH THE OPEN VALVE UNTIL CLOSED.**
3. DRIP FAUCETS
Find the lowest, furthest faucet from the disinfection station and open at a very slow drip. Depending on the severity of freeze, you may need to drip multiple faucets to ensure water is continuously flowing through house plumbing. You may consider dripping a bathtub faucet and retaining the water in case of an extended power outage.
4. HEAT COMPONENTS
If any of your components (pump, disinfection system) are not in fully conditioned areas (ie non-insulated well house or exterior wall), consider running a heater, heat lamp, or wrapping in heat tape. You will also want to open faucets at a higher flow than a drip.
If you have a submersible pump, it will be protected by the water in the tank.
5. CONFIRM UV LIGHT IS ON SURGE PROTECTOR
Extreme weather events are often accompanied by rolling blackouts or full power loss. To protect your UV light kit, ensure the unit is plugged into a surge-protected outlet.
**IF YOU LOSE POWER**
and it is unlikely it will come back within 30 minutes and temperatures are below freezing: immediately follow the included instructions for “How to Decommission A Rainwater System” included in our full Freeze Protection Guide.
You can contact the Harvest Rain Service team by giving us a ring at 512-645-2955 OR by filling in the form below.
Are you thinking about harvesting rain to use for your garden or landscaping? Read on for our Guide to Planning a Rainwater Irrigation System.
Rainwater is especially well-suited for irrigating raised beds, drip irrigation, trees, and small lawns. Not only will your water bill benefit, but plants love the soft, untreated water and reward you with bigger blooms, tastier fruits, and veggies than watering with well or city water.
Irrigation systems come in all sizes, from smaller barrels to massive, commercial-grade tanks. Harvest Rain starts our installations at 1,000 gallons and scales up from there, depending on the area of your roof used for collection and how you’ll use the collected water.
When designing a rainwater irrigation system, we consider a few variables to ensure the final product is sized correctly and lives up to expectations, including:
How much water do you use for irrigating?
How much water can you collect?
What will you be irrigating?
Do you have a good spot for the right-sized tank?
HOW MUCH WATER DO I USE?
We have several methods to help estimate how much water you are currently using or willuse in the future.
If you are on city water:
1) Call your utility company…
Your water company should be able to provide your property’s historical usage. You can tease out your irrigation numbers from this data by comparing months you water to months you don’t.
Example using historical water bills:
December 2024, no watering: 4,000 gallons
July 2024: 10,000 gallons
Estimate of Gallons Used for Irrigation in July: 6,000 gallons
2) Alternatively, check your water meter…
Take a look at your meter directly before running your irrigation, noting the reading. Check the meter again after your irrigation cycle is complete. The difference is how many gallons you’ve used in a single cycle.
3) If you have a sprinkler system…
Your sprinkler system may have ‘GPM’ listed per Spray Head Flow at the controller unit, indicating how many gallons of water are used per minute either by zone or actual spray head. If so, you can do some quick math to estimate your irrigation usage.
EXAMPLE:
Zone 1 – 2: 2 GPM / each
Zones 3 – 5: 8 GPM/each
Zones6 – 10: 6 GPM /each
Total = 58 gallons of water/minute
Your water usage for (1) 20-minute cycle of irrigation using all zones= 1,160 gallons. If you are running your sprinklers 2x week = 2,320 gallons/week or 9,280 gallons/month.
If you are in the process of building a new home…
If you are working with a landscaper, you can request a projected water usage plan for their proposed design. This plan will outline how much water your landscaper anticipates you will need on a weekly, monthly, or yearly basis to establish new plants/grass as well as projected numbers for maintaining them.
On a well and unsure of how much water you use?
Many of our customers have more than one water source on their property and are looking to augment their well usage with rainwater. But it can be challenging to know exactly how much water you’re using without a meter. We can use some rough estimates to help get you closer to your number:
Generally speaking, most Texas lawns need 1 to 1.5″ of water per week during the growing season. Let’s take two examples to explore what that means in gallons.
Example 1: A typical American backyard on a quarter acre property is about 8,500 square feet. Each 1,000 sq. ft. of lawn requires 624 gallons of water to receive 1″.
If your yard is 8,500 sq. ft = 5,322 gallons of water used to get 1″ of water into the lawn (often split up between multiple watering cycles/week).
Example 2: If you are looking at a more significant property and determining water usage, one acre = 43,560 sq. ft.
Irrigating one acre of grass with 1″ of water = 27,137 gallons of water/cycle.
A note about grass:
Using the math above, if you have a large lawn, it can be difficult to capture enough to rely on harvested rainwater alone for your irrigating needs. However, if you have considerable roof space and are open to a bigger storage tank, then one of our designs can likely meet your needs.
HOW MUCH WATER CAN I COLLECT?
Once we have a solid working number of how much water we need, we start to look at the square footage of your roof and how much of the roof we will need to utilize. It’s not always necessary to maximize your roof’s capacity. For example, if you are simply irrigating a small veggie garden or flower beds, a 1,000-gallon tank may suffice. In that instance, we would try to identify a nice straight run of gutter from a portion of your roof that will easily fill the tank.
Conversely, if we are looking to meet large irrigation demands, we will likely want to collect as much water as we can. This means we will design a system that captures rain from the entirety of your roof.
SIZING A TANK + CONFIRMING A GOOD SPOT
Our goal is typically to provide for 8-12 irrigation cycles with your rainwater catchment system. Depending on your irrigating patterns, this could be anywhere from 1-2 months’ worth of water.
If we have determined you use approximately 1,740 gallons per irrigation cycle, we’d like to aim for 14,000-20,000 gallons of stored water.
Once we have established these working numbers, our system designers will work with you to select the final tank size. The final variable we’ll want to nail down is the actual spot for tank. Below are several common rainwater irrigation tank dimensions. However, tanks come in many more capacities.
OUR GOAL WITH A RAINWATER SYSTEM DESIGN
We always aim to provide our customers with a rainwater irrigation system that truly meets their expectations. Clearly identifying how much water you need and how much water you can collect right from the start allows us to design a system that delivers lasting value and reliable performance.
WHAT TO EXPECT BUDGET-WISE
Rainwater irrigation systems can vary widely in cost depending on the size of your collection area, storage goals, and property-specific needs. Here’s a general idea of what you might expect when planning a system:
Smaller systems (1,000 -2,500 gallons): typically start around $5,000
Mid-size systems (2,500–5,000 gallons): often begin at $8,000
Larger systems (5,000+ gallons): can run $15,000 and up
These ballpark figures include professional design, quality materials, and full installation. Final costs vary based on site-specific factors like trenching distances and infrastructure upgrades such as gutters.
At Harvest Rain, we focus on delivering systems built for long-term performance and reliability, not just the lowest upfront cost. If you’d like to start planning the right system for your property, reach out to us, we’re happy to help!
PLANNING A NEW HOUSE?
Go Native! With any new landscaping, you will initially use more water to establish plants and trees. However, when you opt for native plants and grasses, after 1-2 years, you can back off on supplemental irrigating and let nature take the reins.
Additional Resources:
Texas AgriLife Extension is an excellent resource for landscape planning. They provide comprehensive lists of trees, shrubs, perennials, ornamental/prairie grasses, and more to help you select plants that tend to be drought-tolerant and require little to no fertilizers (both of which contribute to healthy rivers, lakes, and aquifers – something we really get behind!)
Ladybird Wildflower Centerhas a great database of plants, searchable by appearance, lifespans, light requirements and most importantly water usage.
Find the full ‘Native & Adapted Landscape Plants Guide’ PDF for the City of Austin and surrounding areas here.
Harvest Rain will be closed from December 24th – January 3rd.
Dear Harvest Rain Customers, Partners, and Friends,
First and foremost, I want to extend my gratitude to everyone who continues to rely on Harvest Rain for design work, new system installation, and service and maintenance. We take great pride in being the trusted source for all things rainwater amongst our ever-expanding customer base.
Whether you installed a system with Richard Heineken 25+ years ago or are new to rainwater collection and just installed your first system 2 weeks ago, we promise to provide a quick response to requests, professional communication and interaction, and expert level workmanship.
Our company has moved locations (two times…), welcomed new team members, expanded services, and grown rapidly over the past two years. Despite all the changes, we still see the same long-time customers walk into our office looking for maintenance advice, product replacement, and even new system installations at a new homesite. To our team, the consistency and commitment from our customer base mean we’re staying true to our company values even as we rapidly expand. Thank you.
As everyone is well aware… the past 18 months have presented serious challenges for what we consider “normal” operations. From the prolonged global pandemic to the abnormally cold Texas winter and deep freeze last February, it’s been tough to predict what will happen next. Through all of it, our team has shown remarkable resolve, outstanding work ethic, and a commitment to our customer base.
Our service team and office staff went above and beyond after the winter freeze, working nearly 20 days straight to repair damage and ensure our customers had operational water systems as quickly as possible. Our sales staff has been hard at work fielding the tremendous increase in requests for new quotes on rainwater systems, fire protection tanks, and whole-house backup generators. I could not be prouder of the efforts of the Harvest Rain staff over the past 18 months.
CHRISTMAS CLOSURE NOTICE
I feel it is critically important to recognize that effort by allowing my team a well-deserved break this upcoming holiday season. In that spirit, Harvest Rain will take a longer than usual pause in daily operations from December 24th – January 3rd to allow our employees rest and relaxation, travel and time with family.
We encourage our customers to contact our office over the next month for any service-related requests or retail products they may need before we shut down operations for our company-wide holiday “sabbatical.” While we plan to have a skeleton crew on-call for emergencies, it will be at a significantly lower capacity than in past years. (Hours and instructions for requesting emergency service during that week will be posted on the website once we get closer to the holiday break).
Lastly, I encourage all of our business partners and customers to take time for themselves as they are able to this holiday season. This year has taught our team a lot of lessons about the importance of family and personal health. As Central Texas continues to grow at a remarkable pace, we know the services we offer will continue to be in high demand in 2022. A period of rest and reflection is something we all deserve before revving the engine back up and hitting the ground running next year.
Happy Holidays to all, and we look forward to continuing to be the company you can rely on for all things Rainwater in 2022!
Curious what type of maintenance is required for a rainwater harvesting system? For the purposes of this article, we are discussing maintaining potable systems (i.e., rainwater systems that provide households with drinking water). When you live on rainwater, you are essentially maintaining your own utility, and you’ll want to ensure it provides the highest quality of water for you and your family.
Read below as we break down rainwater system maintenance. If you have an irrigation rainwater system, scroll to the bottom for our best nonpotable maintenance tips.
If you are interested in scheduling a service maintenance appointment with our team, contact us here.
FROM ROOF TO TAP: MAINTENANCE OF A RAINWATER HARVESTING SYSTEM
We’re going to start at the beginning of a rainwater catchment system – the roof and gutters and move down the conveyance line to the tank and finally your disinfection station.
CHECK ROOF & GUTTERS MAINTENACE 2-4x/year (more frequently if you have overhanging trees)
We always recommend snap-in leaf guards for gutters (not micromesh) when designing a new system or upgrading an older one. These screens act as the first step of pre-filtration for your collected rainwater, keeping most leaf, tree, and animal material (birds, squirrels, nests, etc.) from entering your storage tank.
You’ll want to wipe off these leaf guards and ensure both roof and gutters are free of excess debris. Fine dust particulates, etc., do not need to be entirely removed from the roof as your sediment filter will handle these.
FIRST FLUSH MAINTENACE 2-4x / year
With all Harvest Rain potable installations, we include a first-flush to reduce the amount of sediment that ends up in your storage tank. Typically, these first flushes are a run of pipe that ends with a screen.
You’ll want to remove this small screen and rinse. We recommend cleaning the first flush screen on the same day(s) you change your filters and checking after significant weather events.
Your system may utilize an eliminator tank instead of a first-flush. If that’s the case, you’ll need to check that the eliminator automatically drains when full or periodically manually drain to ensure flush capacity during the next rain.
TIP: if your rainwater system does not have a first-flush or an eliminator tank, we invite you to schedule a service call to discuss an upgrade.
STORAGE TANK MAINTENANCE 2-4x / year
All potable rainwater tanks should have a leaf basket/strainer where the inlet pipe meets the tank. There should also be a removable coupling or some way to detach the last PVC fitting/pipe that enters into the tank. Remove this fitting, then the leaf basket, wipe out any debris, rinse with water, and re-install.
NOTE: Cleaning of the interior of a tank is typically only necessary every 15-20 years to help remove any accumulated sediment.
When designing a system for a property with many oaks or overhanging trees in general, we first recommend trimming back tree limbs to prevent excess debris on the roof. Other times, we may also recommend a recirculation system to help negate pollen build-up (which can turn your water a light green – not harmful, but unsightly for sure!)
Give us a ring if you think your tank may need cleaning – we’re happy to direct you to some great resources.
DISINFECTION STATION
The disinfection station is the most essential component of your potable rainwater system. Here, your stored rainwater runs through a sediment filter, a carbon filter, and finally, a UV lamp. If your system does not contain all three steps, we do not consider it a complete disinfection station.
Viqua E4 Ultraviolet Disinfection System
SEDIMENT FILTER Frequency-based on size + demand
The sediment filter should be the first in the disinfection line. We use sediment filters rated @ 5 Microns (meaning they remove anything 5 microns or bigger such as sand, silt, rust.)
Depending on the size of your filter housings, usage level, and the number of occupants, we recommend changing sediment filters monthly or quarterly. Smaller filter systems (2.5″X10″) require monthly changes. Larger systems, such as the Viqua E4 picture above, typically only need to be changed quarterly.
Most Common Filter Sizes
Your system may be equipped with two of the same size filter housings (aka sumps) or two different, depending on the installer and date of installation. Sediment and carbon filters come in various sizes, but the three most common are: 2.5 x 10″; 2.5 x 10″, 4.5″ x 20″.
TIP: If you notice a reduction in water pressure, your sediment filter is the first place to check. When this filter is at the end of its lifespan, it will slow down the water coming into your home. Depending on your home’s water demand, you may find that you need to change your sediment filter more frequently than our above recommendations.
CARBON FILTERS 2-4x/year
The second filter of your disinfection station is the carbon filter, used to condition the water, improving taste and odor. We use a 10-micron nominal carbon filter on our systems.
Like the sediment filters, how often you change the carbon filters depends on the filter size and demand. We typically recommend systems of 2.5 – 4.5×10 be changed quarterly and larger 4.5×20″ carbon filters changed 2x a year.
This excellent chart from WaterFilterGuru.com illustrates micron sizes and how they relate to the particles we’re removing.
UV LAMP Annually
Your ultraviolet light is the most critical part of your filtration system. Not only does it antibacterialize your water, but it also provides a potable supply without the use of chemicals like chlorine.
These UV bulbs are typically rated for 10,000 hours and we recommend changing them annually. Although the bulb may continue to shine, the intensity of the light output will gradually decrease, as will its ability to disinfect your water. Read more about why we use UV light to disinfect rainwater here.
After you have completed the steps above, you have completed the maintenance of your rainwater harvesting system!
Many of our customers enjoy being intimately familiar with their rainwater and opt to maintain their own systems. We sell filters and UV bulbs at our Dripping Springs location.
LOOKING FOR REGULAR SERVICE APPOINTMENTS?
Harvest Rain offers annual service agreements, even on systems we did not originally install. During a service maintenance appointment, our tech will complete the leaf basket cleaning, filter, and UV changes (when needed), as well as visual inspections of the gutters, downspouts, tank, pad, pump, and pressure tank. Contact our friendly service team below to schedule.
IRRIGATION SYSTEM MAINTENANCE
Rainwater systems used solely for irrigation water (i.e., nonpotable) do not employ as extensive a filtration system as potable rainwater collections; hence their upkeep is less involved. However, regularly checking the gutters, leaf guards, and leaf basket at the tank will help protect your irrigation system’s longevity.
If you’re researching the possibility of a rainwater system on your property, you’re likely curious about the availability of tax breaks or rainwater rebates in your area. Below find a list, although not comprehensive, of available rainwater rebates in Texas.
Check out our Top Benefits of Water Reclamation below.
Water reclamation is the process of harvesting rainwater and removing the contaminants to allow it to re-enter the water system for your home. Water recycling is an important step to reducing your carbon footprint, but it also has many benefits to you, your family, and your community.
