Here’s what I need from someone. I currently have a Goulds J05N, dual nose, jet pump in my basement. It’s a ½ HP, 115/230 volt, and it turns 3450 RPM’s. This “rebuilt pump” is 25 years old and the impeller housing is leaking.
I want to replace the jet pump with a submersible pump. I have been all over the internet looking for a GPM rating on the J05N and cannot find it. I called Goulds corporate and they recommended a single nose J5S series single nose pump as a replacement. This is obviously first help desk information that really didn’t help me at all. Does anyone have any idea what the GPM rating is on that model Goulds pump.
I realize there are other factors involved in rating a pump such as friction loss due to the material of the supply pipe, peak usage, and air pressure.
There has to be a simple solution to my dilemma. If I replace the jet pump with a submersible pump with the same GPM rating wouldn’t that work? If anyone needs more information than I have provided feel free to ask.
Here’s the specs on the well itself:
The well is 29’ 6” deep
The static water level is 27’ 3” deep
I opened a bathroom tub faucet, wide open, and measured the drawn down in the well. After 6 minutes the static level only dropped 6”.
Thanks in advance,
Larry

Based on a 1/2 hp motor, I'd say your jet pump is somewhere near 9-10 GPM. If you had a 1 hp motor, it would be about double; 19-20 GPM.



Edited 3 times.

Many manufacturers at one time made a 1/3 HP submersible pump but have dropped it out of their line-up over the years and now start at a 1/2 HP. A 30' well is a good candidate for a 1/3 HP pump but if not available, a 1/2 HP rated at 10GPM would be a good fit too. Your county health department has the data on your well if you give them a call.

Yes, a 1/2 h.p. 10 GPM will be fine. You could even use a 110 V model to save a little money if the existing pump is 110 V.