Sounds like lots of air in the Hot Water Tank to me, which drives hot water backwards out of the tank into the cold water lines when you turn the cold tap on.
I'd think you should be able to blead the air out through the new blo-off valve as it should be the highest thing on the tank. Did you have the water lines disconnected from the tank and possibly reconnected them backwards? The dip tube for the cold water inlet could cause an air bubble in the tank if the lines are connected backward. Ken H. On Monday, 22 October 2018, Rick Rohwer via CnC-List <cnc-list@cnc-list.com> wrote: > > Mine behaves similarly. You should be able to bleed the tank from that new valve. I will give it a shot as well. > > I would guess you have a supply line laying on the hot water hose from the heat exchanger. > > Rick Rohwer > Paikea 37+ > Tacoma, WA >> On Oct 22, 2018, at 11:21 AM, Jim Watts via CnC-List < cnc-list@cnc-list.com> wrote: >> >> I'm baffled. Maybe someone here can figure this out. >> A few weeks ago, I replaced the leaking overpressure/overtemperature valve on our old Raritan water heater, and ever since, the pressure water pump acts very oddly. It starts out sounding normal, then as the pressure builds it is obviously working harder and slower, until finally it stops. When I open the hot water tap, the water runs for quite a while before the pump kicks in, whereas it used to come on almost instantaneously. In addition, when I open the taps after motoring, the cold water tap is providing very hot water for the first 10-15 seconds. >> Yesterday I tried running the system dry then refilling the tank but it didn't seem to help. My best guess is that there is an air bubble in the tank somehow and the pump is compressing the air, so it takes longer to reach pressure and then the pressure bleeds off while the tap is open. >> Any bright ideas on how I might fix this? >> >> Jim Watts >> Paradigm Shift >> C&C 35 Mk III >> Victoria, BC >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray >> > > > _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each and every one is greatly appreciated. If you want to support the list - use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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