Turtle n Peeps wrote:
:h
It's a spring loaded check valve. You can wiggle it all you want and nothing will blow. If it's just slightly off center it will leak just a bit and cause the pump to bump.
Yes it is a spring loaded check valve but what seals it is the o-ring on the plunger that is held closed by the spring.
Wiggling it, pushing in on it etc when there is line pressure can dislodge the o-ring and instead of reseating it it now will not seal at all.
That is why it's best to open a faucet and relieve line pressure first....well second. First would be to secure water source
