Correct or Not

[bhartley (Buck Hartley, CMI)]

Would you say anything???

Thanks!

[mnahrgang (Mark Nahrgang, C.R.I.)]

I don’t see anything here that would cause siphoning or any other problem. What is your concern?

[bhartley (Buck Hartley, CMI)]

Mark,

Thanks, just the amount of turns.

Thanks, again.

[dvalley (David Valley, License #566 - CMI)]

The IRC and UPC do not allow a double trap (in series) but you can do a separate trap on each sink (in parallel - as shown) joined together in an appropriate wye to the wall.

[bhartley (Buck Hartley, CMI)]

Thanks! David

[jpope (Jeffrey Pope, CMI)]

The UPC does not allow this installation. Only one trap is allowed on a trap-line. The UPC would require that the two sinks share one trap.

[mlarson (Michael Larson, WI Lic. # 1672-106)]

@jpope

The UPC does not allow this installation. Only one trap is allowed on a trap-line. The UPC would require that the two sinks share one trap.

We do it in Wisconsin but with a clean-out between the two wyes.

[jpope (Jeffrey Pope, CMI)]

What code does WI follow?

[mlarson (Michael Larson, WI Lic. # 1672-106)]

@jpope

What code does WI follow?

Ammended IBC

[rbero (Ronald Bero, 2347-106)]

The irc allows 2traps to drain into a shared trap arm to the vent connection
http://www.nachi.org/forum/attachments/f22/34368d1263658767t-correct-not-dual-trap.jpg
The upc specifically prohibits this practice &all traps must enter the vent through individual trap arms.