Home>Discussions>PLUMBING>sump pump check valve
3 posts / 0 new
Last post
martys2001
sump pump check valve

I am replacing a PRIMARY sump pump with a combo primary/baCKUP UNIT.
The old unit has a check valve behind a wall.....
the new unit has a check valve on the pump.
questions.... can I leave the old check valve behind the wall as it is?
Will there be any issues with having two check valves on the same discharge pipe?
could there be a vacuum created between the 2 check valves that would prohibit the new pump from discharging?
any advice is much appreciated.

martys2001
Re: sump pump check valve

the new combo pump I am going to install is a Basement Watchdog model BW4000

MLBSF
Re: sump pump check valve

not a problem at all having two check valves. it won't make any difference at all, leave the old one in place.

Sponsored Stories

TV Listings

Find TV listings for This Old House and Ask This Old House in your area.