New submersible ??

What would be a good reason to put in a 3 wire vs a 2 wire submersible pump?
I recently bought the house and there's a fairly new shallow well jet pump and bladder tank now, in the basement. When it turns on the noise is enough to wake the dead, and besides I think the foot valve is leaking. The well is about 60 ft. deep with a 6" well casing about 10 feet in front of the house. It has a welded 6" cross connector pipe below frostline to the house. I'm strapped for cash, and my electrician brother and I could replace the pump and piping, with local permit.
Since the current system has old galvanized pump and suction piping which I wouldn't use again, what recommendations would anybody have re new piping? Polybutylene (its got to be a pain to work with, correct?)? Is
1 1/4" PVC now used instead? What schedule? I'd rather not dig 5 ft. down to the cross connector, saw it off the vertical pipe, weld on a patch, and put in a pitless adaptor.
If using PVC, at the 90 degree junction (tee fitting) from the cross connector to the vertical pipe would PVC support the weight of the submersible pump and piping? Would the horizontal PVC cross pipe eventually chafe through at the load-bearing point?
For a 60 ft. well, how much horsepower is needed for 60 or more PSI at the tap?
Thanks much for any info.

electromechanical said:

What would be a good reason to put in a 3 wire vs a 2 wire submersible pump?

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Probably none, I have a 3 wire pump, well people tell me a 2 wire pump will work just as well, but you have less under water to go wrong.

electromechanical said:

Since the current system has old galvanized pump and suction piping which I wouldn't use again, what recommendations would anybody have re new piping? Polybutylene (its got to be a pain to work with, correct?)? Is 1 1/4" PVC now used instead?

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Polyethelene not PB. 160 psi for the PE pipe.

electromechanical said:

For a 60 ft. well, how much horsepower is needed for 60 or more PSI at the tap?

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1/2 HP

Rancher

You are using a shallow well jet pump so the depth to water is 25 ft or less.

60 psi x 2.31 ft per psi = 140 ft.

Add 25 ft of head for pipe losses. 25 + 140 + 25 = 190.

A 1/2 HP Goulds 7GS05 will deliver 8 GPM at that condition and about 10 GPM at 40 psi when the switch turns the pump on. You will probably use a 40/60 pressure switch.

If you want more flow you can get a 3/4 HP 10GS07 that will deliver 13 GPM at 60 psi.

CAUTION: You probably can't buy such a pump off the shelf at any "Big box" store because they usually sell pumps that are designed for wells where it is 150 ft or more to the water. Such a pump might be similar to a 1/2 HP Goulds 5GS05 that will deliver 100 psi at 5 GPM but only 6.5 GPM at 60 psi.

I'm sure there are other brands but you need to match the pump to the well.

Your bladder tank should have an actual volume at least 3 times the GPM rating of your pump. That would mean about a 25 gallon tank with the 1/2 HP pump and a 40 gallon tank with the 3/4 HP pump. Bigger is better.

With a submersible pump you should have a relief valve at the tank because pressure at no flow is often enough to exceed the pressure rating of the tank.

If you want to minimize digging (especially in the winter) you can probably connect the new polyethylene drop pipe to the existing suction pipe of your jet pump. The flow is low enough that it will certainly be big enough.