I'm having a conservatory built. All my plumbing is being moved except for the vent stack. I won't need it to vent pipes, but it's venting a drain also used by nearby properties. The builders have cut the vent stack to approximately 2 feet above ground level. My question is: Should they have relocated it, as it'll now be in the conservatory? I understood vent stacks were for releasing gasses but the builders informed me it's a fresh air vent.
Plumbing – can a vent stack be left inside a building and simply cut down
drain-waste-ventplumbing
Related Solutions
905.2 Grade.
All vent and branch vent pipes shall be so graded and connected as to drain back to the drainage pipe by gravity.
This might prevent you from doing what you want, since your lower horizontal connection would have to slope toward the stack. Not sure if this is allowed or not, but it might be something to look into.
There will always be a vent stack in a home if you have plumbing in it. they usually poke out the roof to vent and go all the way to the basement and under the basement floor. All the waste water dumps into these pipes and exits the house to the main waste pipe outside your home. Depending on how many bathrooms you have the number of vent stacks can differ but most homes with one bathroom and a kitchen have two vent stacks. The bathroom vent stack will be the larger one (3-4 inches) and the kitchen is generally around a 2 inch pipe I believe. Usually when you tie into a vent stack you cut out a chunk and insert a "y" fitting of some sort. I am no plumber by any means but I have observed this being done. Also, when you tie into a vent stack there is a code in my state where you have to have the vent for the tie-in go above the fixture above it (i.e. above where the kitchen sink drain dumps into the stack if you tie into that stack) I think the name of that would be a branch vent ( see my simple diagram below). Good luck.
Related Topic
- Plumbing – Where to locate p trap and venting in complicated washing machine installation? See sketch
- Plumbing – How to vent a bathtub trap when the drain is routed under the tub
- Plumbing – Tub drains very slow
- Plumbing – Toilet bubbles and gurgles after capping vent stack
- Plumbing – Venting Plumbing AFTER drywall is up
- Plumbing – Venting basement bathroom rough in
- Plumbing – run these plumbing lines like this
- Plumbing – put a PVC coupling in the vent stack
Best Answer
Say what now..... connected to other drains ... opens in your conservatory....
What are they thinking...
You will be subject to all kinds of gasses, and SMELLS, and possible the odd rodent returning up the pipe.
Even if there is some kind of trap down there that prevents backflow, the pipe will suck air from your conservatory and make noise.
Tell them to move it.