Need help with some pump guesstimates.

[John E]

I have a 1/2 hp pump with a 33GPM and a 207' max head. I am putting the unit in a 4" pipe that has a water depth of 35'. 20 gal Amtrol pressure tank. Do I need something to reduce the flow? If so, reduce to what. Doing the math as presented has the pump sucking the well dry relatively quickly. The well is next to a small river , but I would rather be safe than sorry. The pump is from Hallmark. I am using the water for our garden. The pump that was formerly in the well is a Gould powered by a 1/2HP Franklin motor. It had some form of flow restrictor on it when I pulled it 2 years ago, but can't find it anywhere. The only reason for replacing the pump was power. 220 vs 110.. Anyway, thanks in advance for any appropriate advice..

 

[Reach4]

I don't know how many gpm that pump will do, but it will not be close to 33 gpm.

 

[Sponsor]

 

[Reach4]

Their 1 hp pump description matches their 1 HP pump.

The description of their 1/2 HP pump says

• 4" deep well submersible pump, fits in the 5" or bigger well casing.

In other words, it may not fit into a 4 inch pvc pipe, and would be even worse in a 4 inch steel casing.

 

[Valveman]

Reach is right. That is a 1HP pump to do 207' and 33 GPM. Which 1/2 HP pump do you have?

 

[John E]

Reach is right. That is a 1HP pump to do 207' and 33 GPM. Which 1/2 HP pump do you have?

I have the 1 HP. good catch

 

[John E]

I need a little more advice. I'm led to believe that my check valve should be connected directly to the submersible pump. The pump connection is 11/4" NPT female and the check valve seems to be the same on either end. I have a 11/4" male to 1" barbed pipe connecter for the other end of the check valve. What am I looking for to connect the check valve to the pump. It would seem that I need a double 11/4" NPT . I lack the correct terminology to look for this. Thanks for the help and the patience.

 

[John E]

Thanks for all your help. I got a 4" long 1 1/4 "NPT brass double male "nipple to connect the check valve to the pump. I used 2" vinyl tape and a torque arrestor to stabilize the line. The wiring is connected with the appropriate waterproof connections. Thanks to you folks I understood a pitless adapter and connected the pump line to it. I have the pressure tank and pressure switch all connected. I will run the pump tomorrow for the first time. I am sure this all sound basic to you folks, but is a win for me. Again, thanks for all the help.