"Harry K" wrote in message
...
On Sunday, August 3, 2014 1:14:35 PM UTC-7, Pico Rico wrote:
"Harry K" wrote in message

snip

OK. Told the neighbor I would be using off their well. Turned on the
interconnect and then discovered that there was no shut-ff between the
pressur tank and my well. Neighbor would have been pumping right into
wherever my leak was.

didn't you have a check valve between the pressure tank and the well?

No. I know people think one should be there but it is redundant and does
nothing but add restrictions to the system. The checkvalve goes in the
well, normally just above the pump or it may be part of the pump.

One can be, however, installed between tank and well somewhere if the one
in the well fails.



I saw a report somewhere where someone had installed multiple checkvalves
in the drop pipe on a very deep well. No explanation of why they thought
that was a good idea.

so when the foot valve fails, the entire stack is not drained. And when t
he foot valve and the bottom check valve failes, ditto.

Not sure that is what I would do, though.