Rainwater Harvesting for Small Applications
How much water can I collect?
One of the first things to consider when deciding whether or not a rainwater harvesting system will help meet water demands is your collection potential. An easy calculation to determine your collection potential is below:
Yearly Rainfall (inches) X Roof Footprint (square footage) X .62 X .95 = Gallons
Note: When picking out a rainwater tank, do not size it to the total yearly collection potential as you will use water throughout the year. If you need help sizing a tank, please follow the link here.
Filtering the water off the roof is essential to giving you the highest quality, healthiest water possible--especially if it is a primary use of water for your application. The WISY Garden Downspout Filter Package will filter out any particles larger than 44 microns and can be mounted in-line with a downspout. Each filter is suited for up to 1,000 square feet of roof area.
Space is at a premium when it comes to small homes, that is why RMS has developed a rainwater filtration system with a minimal footprint and minimal electrical demand. This filtration skid will remove sediment in the water, reduce odors and discoloration, as well as eliminate bacteria in the water by way of the ultraviolet light. We take the guess work out of setting up a filtration system by mounting components and pre-plumbing the filters--all you need to do is plumb into and out of the skid and supply the power.
TINY HOUSE FILTRATION PACKAGE
This package offers all of the pre-filtration, pumping, and post-tank filtration elements necessary for smaller rainwater harvesting applications such as tiny houses, mobile homes, RVs, sheds, garages, and more.
The purification unit comes pre-plumbed and pre-wired, requiring only two plumbing connections be made and one electrical connection. This system is all powered by either 12VDC or 110VAC connections (choose below).
Included in this package:
- Garden Downspout Filter (choose quantity)
- for filtering up to 1,100 square feet of collection area
- Mounting Clip and Screw
- Hose and Tension Ring
- Pump to provide 40 PSI at 4 gallons per minute
- Pressure switch shuts pump off at 55 PSI
- Pump is on-demand pump, no manual turn on or off
- Sediment Filter (5 Micron) & Housing
- Removes sediment and particles
- Carbon Filter & Housing
- For odor and taste
- UV Light
- For bacterial disinfection
- Necessary ball valves, check valves, pressure gauges already installed
- Plumbed in PEX
- Easy wiring box for electrical and "On/Off" toggle switch to close power circuit as necessary
- Post-tank filtration elements and electrical components pre-plumbed and pre-wired
As this is a custom fabrication, lead time for this package is typically 3-4 Weeks from order. Due to the size, the shipping cost may be high.
Rainwater Management Solutions offers many rainwater tanks in all shapes, sizes and materials of construction. Below are a few rainwater storage tanks that we have selected specifically for small rainwater harvesting applications due to their size, portability and affordability. With water tanks, it is important to keep in mind the weight of a full tank and that your structure can support the weight of the tank: one gallon of water weighs about 8.35 pounds.
The cylindrical rainwater storage tank from Rotoplas is a great option for rainwater storage with a small footprint.
200 Gallon tank: $230.95
40" diameter x 42" tall
400 Gallon tank: $350.95
40" diameter x 80" tall
500 Gallon tank: $399.95
48" diameter x 73" tall
Norwesco Loaf Tanks
The loaf tank from Norwesco is rectangular option for rainwater storage with a small footprint, allowing it to sit flush against a wall.
100 Gallon tank: $250.75
41" long x 27" wide x 30" tall
300 Gallon tank: $455.80
63" long x 42" wide x 30" tall
500 Gallon tank: $670.45
92" long x 48" wide x 31" tall
Fol-Da-Tank Pillow Tank
The pillow tank from Fol-Da-Tank is a good option for storage underneath a house or camper.
100 Gallon tank: $454.00
4'6" x 4'10" x 16" (+/- 6" filled)
525 Gallon tank: $757.00
8'3" x 5'4" x 18" (+/- 6" filled)
800 Gallon tank: $865.00
10' x 6' x 2' (+/- 6" filled)