Hi there ..
I'm trying to sort out my sand point pump problems. 3/4HP with a 5 Gallon Pressure Tank.
I was initially having trouble with the pump cycling on / off frequently ... sometimes throwing the breaker. I drained down the tank and checked the air pressure in the bladder ... it had none. I pumped it up to 2lbs below the cut in pressure .. checked it the following morning and it was holding... primed the pump .. and all was good for a month or two. It seems to be slowly losing the air pressure in the bladder. When I depress the air valve on the end of the tank .. it reads zero ... but yet it doesn't leak any water to directly indicate a blown bladder. I shook the pump/tank to see if it had emptied completely .. seemed to be a touch of water in there ... as I pumped up the air pressure leaving the drain open .. a little bit of water continued to escape and I could hear the bladder on the move as I pumped the air.
Looking for a little advice from someone in the know ... before I chase replacement parts. Are the bladders easily replaced if need be .. or are most small bladder tanks throwaways?
Thanks very much .. hopefully I've covered all the necessary info.
Steve