I want to put a utility sink in my garage. The main reason is to have
softwater hot & cold for car washing etc. I plan on tapping into bathroom
plumbing in the basement and run pipes up and through the firewall just
above the foundation wall into the garage. I have easy access to the
basement bathroom plumbing in an adjacent unfinished utility room. I know
how to solder copper and PVC pipes etc but have never done any drain/vent
The toilet and sink vent are shared in sort of an 'h' configuration. There
is also a shower drain which is probably connected to that venting as well
but I can't see that. The toilet vent would be the easiest and closest for
me. I don't care about finishing the utility room so the pipes can run
outside the wall cavity.
My question is where to splice the drain for the utility sink? Can I splice
anywhere into the basement toilet (2") or bathroom sink vent (1.5") stack
without causing problems?
What measures do I take when passing the plumbing through the garage wall
Garage can get cold enough to freeze I plan on putting some kind of manual
shutoff/drain valve in the basement, but I would prefer some kind of
automatic (passive) system where the pipes drain back into the house each
time the water faucet is turned off or not in use. Does such a thing exist?
(I know about anti freeze hose bibs but I do not want to use those if
Do anti siphon valves need to be permanently installed on the plumbing? Or
am I OK just using an external add-on hose bib anti siphon valve attached to
the sink faucet?