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Old 02-08-2009, 10:52 AM   #1
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no cold water pressure to 2nd story

Hi and help. We are in an older home with a well. We have a well-trex water pressure tank set at 30psi. It looks old and not sure if it has a bladder or not. The switch is a pumptrol D 20/40 psi. It is only a couple of years old and looks to be in good shape, no corrsion and clean. The problem started when we had the piping done to hook up the washing machine. After running it 4 times and our small portable dishwasher once we discovered there was no cold water pressure to the upstairs bath, with the only shower in the house. The toilet tank is pretty much dry too. The downstairs bath works; but after flushing the toilet and running the water a couple of minutes the switch comes on and bangs the pipes around so we run down to hold it down to get the pressure back up. We have read that the pressure should be around 30 psi like the tank and have moved the 2 screws cw and ccw to try and figure out which work, but still no pressure. Not sure where to go from here. Did I over tax the tank? We have checked the pressure with a tire gauge and it still reads around 30 psi. Do we need to call back the plumber. Any advice would be helpful. Thanks chellecalvin


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Old 02-09-2009, 10:00 AM   #2
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The pressurizing tank does not have to have a bladder but it must provide a good air cushion. I'm not sure how to calibrate it but there must be some expert opinions on this. If the pump has short on and off cycles, chances are there isn't enough air in the pressurizing tank. Without a bladder the tank needs to be calibrated more often since air will be gradually absorbed.

Are you sure that pipes leading upstairs did not become clogged perhaps with sediment that got shaken up when you installed the washing machine piping?


The good conscientious technician or serviceperson will carry extra oils and lubricants in case the new pump did not come with oil or the oil was accidentally spilled, so the service call can be completed without an extra visit.
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Old 02-09-2009, 11:38 AM   #3
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add some air to the tire valve looking thing,,see what happens. IF it isnt holding 40# of pressure screw it till it does,,if the 'switch' is defective replace that next. Non bladder tanks needs air regularly!!

You should have either a 20 - 40 switch or a 30 - 50 switch,,,lower is turn well on pressure,upper is shut off pressure

Forgot how to calculate head pressure,,how much pressure loss given rise in elevation,as in second story height. IF your pressure is enough,,,you shouldnt be able to tell the difference in upstairs and downstairs,pressure wise. Low pressure plus some crud,could, block from going upstairs,,or crud has plugged all screens faucets and cartridges.
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