I have an in-well pump with a solenoid and expansion tank where the line
enters the house. Can someone please advise what the air pressure
should be in the tank? I had thought it was to be 28 or 29 lbs and put
this when the line was depressurized. Upon opening the line, the
pressure of course went up to 60 or 70 lbs with the pressure of the
water on it. I thought this was OK but a neighbour said it was way too
high. So, what is the proper procedure to do this and how much pressure
should I put in the bladder?
Also, what are the proper settings for the high (cut-off) and low
pump/impeller and installation design determines the cut in and cut off
adjust pressure of the air bladder to 2 lbs below cut-in with water
pressures/suction in the tank or and no hot sun beating on it...
anotherwords kill pump power and open a faucet check and adjust pressure.
The pre-charge is adjusted with the tank empty (turn off pump and open
a valve) and is set to approximately 2 psi below your cut-in pressure.
Standard pressures for residentual systems
20/40 - adequate but minimal and not very satisfactory at the low end.
30/50 - good. Some impulse sprinklers might have a problem at the low
40/60 - very good but not really needed unless doing a lot of
irrigation. Some people like this because of the 'hard, needle shower'
at all ranges.
Setting over 40/60 are not recommended as they cause excess wear on
The pressure switch should have instructions on how to adjust it.
Usually one screw taller than the others will adjust both the cut
in/out settings while the others adjust just one of them.
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