I have a 50 L Truper pressure tank. It loses pressure, water comes out of the air valve and the pump recirculates frquently. I believe that the bladder is leaking water and have purchased a new one.Before opening the tank and replacing the bladder are there any precautions I should take? What air pressure should I put in the tank and do I do this before adding any water?
Thanks

Ed

Not familiar with that type of tank. Evidently it is one which has a replacable bladder. I don't know of any precautions other than to bleed down all pressure to zero. Once you have the new bladder in, you will pressurize it to 2# BELOW the cut in pressure. So, for instance, if the pump cuts on at 40#, you would put the pressure at 38# at the top of the tank. Do this with the pump off and no pressure on the system.