My contractor is installing a Whirlpool 40g water softener and the
main valve is leaking.
I noticed the in and out on the bypass valve is reversed (city water
is going in the Out of the valve, and the house is going to the In).
He said that should not matter as the pressure should still be going
to the home.
The manual also noted this is something that needs to be done
correctly.

Any advice?


Thanks.