Rainwater is safe for both potable and non-potable use depending on treatment and filtration methods

A: Rainwater collection is a function of captured roof square footage & annual rainfall averages for your region.  

By using this formula, you can calculate how much rainfall you can capture based on your structure footprint:

(roof size ft²) x (0.6) x (inches of rainfall) = [Rainwater Captured] in gallons.

A general rule of thumb is for every 1,000 ft²  of roof capture, you will generate approx. 600 gal.

Call us if you have questions regarding how much rainwater you can collect depending on your location.

1. For a potable water supply, a metal, clay tile or cement tile roof is required. These are considered suitable roof materials for a catchment surface because they don’t contain harmful toxins that can contaminate the rain water as it moves across the roof surface. For example, asphalt roofing wouldn’t be an acceptable roof surface if you want to harvest rainwater for drinking.

However, keep in mind some cement and clay tile roofs may not be ideal if they leach minerals. Also, the roofing shouldn’t be coated with another material.

If you are collecting rainwater for irrigation or non-potable use, any roof type could be acceptable.

For potable use – fine mesh gutter screens are required.

At RainSaver Harvesting, we design our systems based on how much is used daily, monthly, or annually. The average person uses approx. 40 gallons of water per day or 1,200 gallons per month.

The idea for determining rainwater storage tank capacity is to store enough collected rainwater to last through a “dry season”, which can be 4 – 6 months out of the year in Central Texas.  We design our rainwater collection system to allow for a minimum of 4 months of full – time usage without a rainfall event to to re-supply your rainwater storage tank.  In the years that we have been designing and installing rainwater harvesting systems, we have not had a rainwater storage tank empty upon reaching full capacity.  

Annual usage plays a factor in design and function as well.  Based on annual rainfall, a family of four using rainwater full-time would require a minimum square footage of roof = approx 3,000 sq. ft.  yielding an annual capture of 54,000 gallons if the region had an annual rainfall average of 30 inches/year.

• Minimal hardness mineral content
• High quality, reliable, & independent water supply
• Environmentally Friendly
• Promotes healthy water conservation practices
• Reduces water draw from local municipalities or water table
• Reduces stormwater drainage, erosion & flooding.
• No sales tax on equipment or services
• Insurance savings, rebates & incentives

RainSaver Harvesting uses Aqualine Storage Tanks manufactured in Round Mountain, TX.  

Tank exteriors are constructed from G90 galvanized steel, approx. 3x thicker than that of competitors tanks, making them especially corrosion resistant.  Roofs are constructed of galv. alum. 

Aqualine Rainwater Storage Tanks are warrantied for 20 years.  

Bartlett Tank Liners supply all of our rainwater storage tanks.  

Bartlett Tank Liners come with a 20 year warranty. 

Liners are constructed of a durable polypropylene exterior & lined with polyethylene.  Liners are NSF-61 food grade certified and BPA free. 

Yes, switching from rainwater to existing well or municipal supply is as easy as turning two valves.  

The rainwater collected in your tank shouldn’t freeze, however there are other issues to watch out for.

With a “dry” in-ground system, you wont have to worry about freezing/cracking pipe conveyance.  

The housing for all your rainwater equipment is climate controlled to prevent small water lines and equipment parts from freezing / cracking.