Exposed ABS in garage

[Allan Chong]

New place we've just purchased in Tahoe (cold but not that
cold). Place was originally built by plumber, 100% ABS circa 1981.

in an effort to get W/D out of kitchen and electric water heater->tankless
out of hallway, I'm moving them to garage, where I'm building a small insulated
utility room. Main plumbing soil stack already passes through utility room.
I'm putting several sections of unistrut on the walls for gas and copper plumbing.

Question:
Can I run new ABS for W/D and laundry sink exposed on the strut, or does it
need to be in-wall (which I'd rather not dig into exterior wall for). can't go on
other wall because of doorway, and garage is a slab. vents can go straight up
without problem.

Or should I do it in Brass DWV (like we did for commercial location)
or hubless cast iron (which seems silly when rest of everything is ABS)

 

[Mr tee]

ABS exposed in the garage runs into problems with the fire code. So does a gas dryer unless it is raised 18" above the floor

 

[Sponsor]

 

[wwhitney]

Seems like once the utility room is built, it's no longer a garage. Assuming you provide the proper garage-to-house drywall barrier between the garage and the new utility room. And use the proper door to the utility room (if you enter it from the garage).

Cheers, Wayne

 

[Allan Chong]

ok, thanks. just haven't seen it that way and wanted confirmation I wasn't
doing anything outside code. (and usually haven't seen ABS DWV run on unistrut)

Yes, 5/8 drywall, insulation, and fire rated door. W/D will probably be stackable.

The main stack is already sticking out in garage surrounded by a drywall chase, so
putting it into wall for 8ft, then coming out and into the stack seemed silly.

 

[Jeff H Young]

No problem with ABS in the garage as long as its not passing through the fire rated wall. that's where you'll have issues.