- A chlorine system requires at least 6.5 gpm.
- An ozone system requires 8 gpm minimum.
- An ECOsmarte system requires 10 gpm.
If the desired system is an ECOsmarte but the flow rate is too low, there are three options:
- Add a 300 gallon (or larger) holding tank and a booster pump designed for 10-12 gpm. This is the best option.
(Average prices: 300-gallon tank, around $700; booster pump between $1000-$2000; installation, around $400)
I recommend Dap Pump 727956.
- Select a different system, like an ozone or chlorine system.
- Use a lighter media in the filter tank that requires lower gallons per minute. The trade-off is that the lighter the media, the less that iron and minerals can be filtered and removed. Optimally, a thick, heavy media with a high flow rate will produce a strong thorough backwash.
- If you happen to be on a chlorinated community water system, the chlorinated water will have reduced the amount of minerals to be removed, and you could get by with 8 gpm instead of 10 gpm.
- If the flow rate is too low, the media will clog quickly and may need to be changed every one to three years.
(a) Accurate psi gauge
(b) 5 gal bucket
(c) Stopwatch or clock
- Make sure the water system is at full pressure (psi).
- Make sure no water is being used during the test.
- Turn off well pump.
- Drain water into bucket until there is no more pressure: how many gallons did you drain?
- Close drain valve.
- Turn on pump and time in seconds until the pump turns off: How many seconds did the pump run?
Repeat 2 or 3 times for consistency.
Formula to figure GPM recovery rate:
Gallons divided by seconds X 60 = GPM