Advice on new pressure swtich

[Dzd9fy2]

Just replaced a water logged pressure tank [25 years onld] and want to swap out the pressure switch as well as it has on a few instance not kicked on previously, but unsure if I just get the same size or not. Here are the details:

Well depth= 80 ft
Drop pipe= 60 ft
Pump= 18G GPM
Pressure Tank= 119 Gal WX350D pre-charged to 38psi
Existing Switch= 30/50
Existing Pressure Switch kicks on just under 50 and off just under 70

Ok to go with 40/60 as they seem more readily available, but is the pre-chare of 38psi on the tank a concern?

 

[Reach4]

Maybe replace the pressure gauge while you are at it. Does yours go to zero when the pressure is zero?

You could get a 40/60 pressure switch, and that would match a 38 psi precharge. With a submersible pump, you normally want the precharge 2 psi below the cut-in pressure.

Of course precharge is easy to change... although it is good to have a compressor with a CFM or SCFM rating to raise the pressure... or drive the tank to your tire store in the back of your truck.

 

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[Valveman]

Just replaced a water logged pressure tank [25 years onld] and want to swap out the pressure switch as well as it has on a few instance not kicked on previously, but unsure if I just get the same size or not. Here are the details:

Well depth= 80 ft
Drop pipe= 60 ft
Pump= 18G GPM
Pressure Tank= 119 Gal WX350D pre-charged to 38psi
Existing Switch= 30/50
Existing Pressure Switch kicks on just under 50 and off just under 70

Ok to go with 40/60 as they seem more readily available, but is the pre-chare of 38psi on the tank a concern?

Sure you can change a 40/60 switch to a 50/70 by tightening the large adjustment screw about 4 full turns to the right.

I can't imagine what one of those 119 gallon tank costs these days? A Cycle Stop Valve would have prevented the pump from cycling, which is what caused the tank to go bad and has been destroying the pump at the same time. A PK1A kit with a 4.5 gallon size tank would have saved the pump from cycling while delivering strong constant pressure to the house. You can still use a CSV1A with a 119 gallon tank, but you have to use up the 30 gallons in the tank while the pressure drops from 70 down to 50 before the pump will start. But once the pump starts the CSV will keep the pressure at a strong and constant 68 PSI (with that size tank) for as long as a shower is on or water is being used elsewhere.

CSV1A CYCLE STOP VALVE

Compare to the Competition Model CSV1A CYCLE STOP VALVE is recommended for 1 to 25 gpm and is adjustable from 15 psi to 150 psi. It is a stainless steel valve with a molded thermoplastic spring cage. It also has three additional ports (2 - 1/2" and 1- 3/4") and can be used as a pressure tank...

cyclestopvalves.com