Pressure Tank/Switch

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Danny Regalia

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My current pressure switch is 40/60. I guess my pressure tank is 40/60 as well. Lowes didn't have a 40/60 tank so I got the 30/50 tank. So my question is do I really need to do something to the switch? If so, can anyone explain how do change the switch to a 30/50 or a youtube video.
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Dan
 

Reach4

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No. The air precharge would be set at 2 PSI below the 40 PSI if using a submersible pump.

Since you are in SC, I suspect you have a jet pump.. In that case, maybe 5 psi.
 

Danny Regalia

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Nope no jet pump here, have a submersible pump about 200' down in the dark, cold place. But do I really, really need to do anything to the pressure switch?
 

Reach4

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The air precharge should be set to 2 PSI below the cut-in pressure.

You could adjust the air precharge higher with a compressor/ tire pump, or you could adjust the pressure switch downward with the nut on the BIG nut (3.5 turns turns CCW would turn down the pressure switch (both turn on and turn off) by about 10 psi.

Usually you would adjust the air precharge. Air precharge is always measured and set with zero psi water.

Avoid a "250 psi" tire inflator. Those are normally crap. If you buy a compressor, get one with a CFM or SCFM rating. A larger bicycle pump can work.

Checking air precharge is supposed to be on your annual to-do list. I check maybe every 3.
 

GReynolds929

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My current pressure switch is 40/60. I guess my pressure tank is 40/60 as well. Lowes didn't have a 40/60 tank so I got the 30/50 tank. So my question is do I really need to do something to the switch? If so, can anyone explain how do change the switch to a 30/50 or a youtube video.
Thanks
Dan
Pressure tanks don’t come 40/60 or 30/50 like a pressure switch. They do come precharged with air, usually 20-30 psi. The pressure tank needs to be precharged to 2-5 psi lower than the pressure switch cut in. If you have a 40/60 switch, drain the tank until no water comes out, check the pressure at the schrader valve on top, if needed adjust until it has approx 38 psi. No need to do anything with the pressure switch. Maybe post a picture of the tank and switch.
 
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