The check valve could be built in to the pump discharge but it is definitely
past the impeller and volute. Therefore no back pressure is on the volute
except incoming pressure from the fresh water holding tank.
Don Leith
> Don,
> Interesting. I cannot remember there being a check valve after the
> output of my water pump. If there was one, I would not have had 2 pump
> failures due to back flow pressure from the water heater. When I changed
> out my pump, there was water flowing back from the water heater. I am led
> to believe that the check valve is in the water pump. It is raining
> tonight so I will try to take a look tomorrow to be sure. As you know I
> have been wrong several times. Chuck B
>
> Don & Vicki Leith <dleith@escapees.com> wrote:
> Chuck,
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