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Bladder in a water tank for a pressurized water system

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RVGRINGO
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Post by phxfunguy Sat Apr 07, 2018 9:19 am

I installed a bladder pressure tank system in 2011 and last year I started having low pressure so my on demand water heater wouldn't kick in due to too low a flow and then the pump started running more frequently. The same plumber checked it out and found a pinhole in the bottom curved part of the metal tank, the bladder was fine, so I had to buy a new tank. I asked if that was typical that the metal would give out after only 6 years and he said "Chinese metal." I don't know how much truth there was to that. anyone else experience that?

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Post by cypress Sat Apr 07, 2018 9:41 am

phxfunguy wrote:I installed a bladder pressure tank system in 2011 and last year I started having low pressure so my on demand water heater wouldn't kick in due to too low a flow and then the pump started running more frequently.  The same plumber checked it out and found a pinhole in the bottom curved part of the metal tank, the bladder was fine, so I had to buy a new tank.  I asked if that was typical that the metal would give out after only 6 years and he said "Chinese metal."  I don't know how much truth there was to that.  anyone else experience that?
Thanks. Interesting. My on demand water heater seems reluctant to come on sometimes (I hate it-the first and last one I ever have I hope).

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Post by CanuckBob Sat Apr 07, 2018 9:46 am

Most of the Bosch ones require a minimum 30psi to turn on. You can get some Mexican brands that require far less flow. I have my pressure switch set to 30psi to 50psi.

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Post by Cincy Thu Apr 12, 2018 10:46 am

The constant problem I have with with my old 62 gal pressure tank is not the membrane/diaphram but a leaky pressure charging valve. Not the screw-in schrader valve but the rubber valve stem in screws into, which does nor seat well in the tank wall. You would never know it leaks until a little washing-up liquid and water applied to the outside of the rubber valve stem produces a bubbling froth. Every 2 - 3 weeks I recharge it with my air compessor - 3 minute job...

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Post by Canada_Mike Thu Apr 12, 2018 12:55 pm

Mine ran out of air, but fortunately was otherwise all right.
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