"kim gross" wrote in message ...
Your water capacitor is a bladder tank, or pressure tank. It is
normally a metal tank with a rubber bladder in it with a fitting on one
end for the water and the other for air to pressurize the bladder.
Small ones are very common in new houses to help reduce the damage from
water hammer, large ones are used on wells so the pump does not have to
run all of the time. You should be able to find some at your local home
improvement stores in the section that has the pumps.

I was thinking about it, but this bladder tank is usualy pumped to 10PSI
so when I put it in the place in the system which has running pressure
60-70PSI would not give me desired effects...
I could pump the bladder tank to higher pressure, something like 80PSI
but I am not sure if the design of such bladder tank allows for this...

Also, a bladder tank is quite large, so combined with my drinking water
bladder tank at the output already would not fit under my kitchen sink ;-)
BTW - Boomer did not mention bladder tank, just adding the booster pump,
so I asked how to make the pump not cycling... I am just curious, since
I have never seen a working filter installation with a booster pump before :-)