Theplayer11
New Member
I'm trying to figure out what is going on with my well and what size pump to get..I've read about TDH, friction loss, ect, read the charts, graphs of different size pumps and my head is spinning. From my previous posts, I own greenhouses and water 5-6 hours straight during spring, summer.
some facts:
-well is 180', artesian dug in 1993
-refrac in 2010(10GPM)
- I believe pump is set about 20' off bottom
- today I measured water level before I started irrigating - 25 feet down
- I watered for about 2 hours and measured- water was now 50' down
- current pump(which I believe is on the way out) is delivering 5GPM.(used to be more) This was measured from a 15 foot hose filling my 1500g storage tank right next to Amtrol tank and 10 feet from well.
- lots of iron(rust)
Ok..what is this telling me? Is down 25 feet in 2 hours when the pump is delivering 5 GPM mean my recovery rate is below 5GPM??..That would be troubling....but only 50 feet down after 2 hours when well is 180'...would be a positive?
I water by using a booster pump(water gun) that is gravity fed from the 1500g storage tank. I get about 10GPM on the end of 200-250 hose this way.(pressure to water plants is right where I want to be)
My goal is to have the well pump deliver the same or close(7-8 GPM min) to the storage tank so that tank never runs out during 6 hours of watering. I do remember that it used to keep up, but over the years it seems to be draining down faster. The well pump has been replaced a few times, and I'm guessing that maybe it has not been matched up properly. The last time was about 4 years ago and I believe a 1/2HP 7GPM pump was installed. This might have been a used pump even..a plumber friend had it laying around.
From reading the pump charts, I believe I should try a Goulds 1/2HP 10GPM pump. If it is pumping too much, couldn't I just turn down the faucet(usually wide open) on the Amtrol tank to increase PSI?
Any suggestion or input on my situation would be appreciated. I'm trying to learn what I can.
some facts:
-well is 180', artesian dug in 1993
-refrac in 2010(10GPM)
- I believe pump is set about 20' off bottom
- today I measured water level before I started irrigating - 25 feet down
- I watered for about 2 hours and measured- water was now 50' down
- current pump(which I believe is on the way out) is delivering 5GPM.(used to be more) This was measured from a 15 foot hose filling my 1500g storage tank right next to Amtrol tank and 10 feet from well.
- lots of iron(rust)
Ok..what is this telling me? Is down 25 feet in 2 hours when the pump is delivering 5 GPM mean my recovery rate is below 5GPM??..That would be troubling....but only 50 feet down after 2 hours when well is 180'...would be a positive?
I water by using a booster pump(water gun) that is gravity fed from the 1500g storage tank. I get about 10GPM on the end of 200-250 hose this way.(pressure to water plants is right where I want to be)
My goal is to have the well pump deliver the same or close(7-8 GPM min) to the storage tank so that tank never runs out during 6 hours of watering. I do remember that it used to keep up, but over the years it seems to be draining down faster. The well pump has been replaced a few times, and I'm guessing that maybe it has not been matched up properly. The last time was about 4 years ago and I believe a 1/2HP 7GPM pump was installed. This might have been a used pump even..a plumber friend had it laying around.
From reading the pump charts, I believe I should try a Goulds 1/2HP 10GPM pump. If it is pumping too much, couldn't I just turn down the faucet(usually wide open) on the Amtrol tank to increase PSI?
Any suggestion or input on my situation would be appreciated. I'm trying to learn what I can.