I was corrected by my NC county plumbing inspector on the proper way to vent this floor drain.
Even if I change the 4” combo to a sweep and throw in a horizontal 4x3 wye to catch the floor drain, the p-trap is still not protected from the toilet discharge syphoning the p-trap.
“In a perfect world would it syphon? Probably not. Reguardless, the codes must be met.” says my inspector. We’ve actually become friends over the years.
Luckily the floor drain fixture branch travels under the chase. I will install a 3x2 combo for dry vent looking straight up. Dry vents must remain vertical (45-90 degrees) until it is 12” above the flood level rim of fixture. (I think it’s 12”, correct me if I’m wrong, just too lazy to go look it up right now)
Even my field supervisor got this wrong.
Thanks TW, checking with my inspector is definitely the way to go. No wasting time installing something incorrect.
Even if I change the 4” combo to a sweep and throw in a horizontal 4x3 wye to catch the floor drain, the p-trap is still not protected from the toilet discharge syphoning the p-trap.
“In a perfect world would it syphon? Probably not. Reguardless, the codes must be met.” says my inspector. We’ve actually become friends over the years.
Luckily the floor drain fixture branch travels under the chase. I will install a 3x2 combo for dry vent looking straight up. Dry vents must remain vertical (45-90 degrees) until it is 12” above the flood level rim of fixture. (I think it’s 12”, correct me if I’m wrong, just too lazy to go look it up right now)
Even my field supervisor got this wrong.
Thanks TW, checking with my inspector is definitely the way to go. No wasting time installing something incorrect.
