They are shut off valves. The pump and filter can run just fine with out them, but using them makes it much easier to service the pump and filter.
. . . membership upgraded.
Re: What do plunger valves do & are they necessary?
They are shut off valves. The pump and filter can run just fine with out them, but using them makes it much easier to service the pump and filter.
. . . membership upgraded.
PoolDoc / Ben
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