Sink Vent Plumbing

[D45]

For sink piping connections involving vent plumbing........should they be primed/glued?

I was doing some work under the sink and was able to twist all of the fittings and pvc pipes for the vent work

Google says it's for gases and can be sealed, but I cannot find into to say it should be

what's GJ say?

 

[thr3squared]

Is it PVC or ABS? I've always done drain/waste/vents in ABS, and glued all connections.

*just looked it up, nothing wrong with PVC for vents.

 

[duneslider]

I would say yes they should be glued.

 

[D45]

PVC

 

[billconner]

They should be treated just like drain pipes - glued joints. (or solvent welded may be more accurate) If you get a down stream blockage, they'll fill to level of rim of sink.

 

[D45]

Thanks. I will pull it apart and glue it all up

Strange, I wonder why it was never glued

 

[FMB4]

Strange, I wonder why it was never glued

Wife and I bought a house that was built in '92 in '01. We later realized that the sprinkler system supply lines were installed without glue. The lines and fittings were just 'pushed together' and back filled. We later were told by a couple of neighbors that they had the same problem. Lot's of fun...

 

[thammel]

Definitely prime and glue. The pipe goes out the roof and rain can get back in. If not glued, you could end up with drips.

 

[couch67]

Definitely prime and glue. The pipe goes out the roof and rain can get back in. If not glued, you could end up with drips.

not to mention sewer gases in the house

 

[FredWanaker]

Definitely prime and glue. The pipe goes out the roof and rain can get back in. If not glued, you could end up with drips.

my neighbor had a leak and moisture for years. He thought it was a leaky roof but could never find it. Turned out to be one abs vent line in the wall that wasn't glued, rain went down it, ran out the seam and down the outside of the pipe. Since we are only two homes from him and it is a tract home, I put tee's on the top of the vents for years until I could check all the ABS vent pipes to be sure we didn't have the same issue as the cause of a mildew smell. Cut the Tee back at an angle on each side so the top of the non-cut area protects the pipe from rain.

 

[mike93lx]

I can't imagine skipping glue on any plumbing

 

[mikegt4]

Is it PVC or ABS? I've always done drain/waste/vents in ABS, and glued all connections.

*just looked it up, nothing wrong with PVC for vents.

Here in Ohio you really have to look hard to find any ABS plumbing, same with Florida were my brother lived. When I go to California to visit friends everything is ABS. Just one of many things they do different.

 

[thammel]

I had a black spot in my vaulted master bedroom ceiling. Darn. Used a borescope to poke through and look up there. Near a vent pipe. Darn. Poked one of my fiberglass electric "fish" poles through to mark the spot and get all the way through the insulation. So there are scissor trusses up there to create the vaulted ceiling. At 69 I crawled up there and moving sheets of plywood ahead of me so I could get to the location. Sure enough, bad glue joint (not the first bad or nonexistent glue joint I found in this year 2000 built house). I can barely reach the spot. Good excuse to buy a 12 volt milwaukee sawzall (18 volt one was too heavy to hold at arm's length). So I cut out the bad stuff, have all my tools and glue, etc. up there and make the repair. Getting out of there was tough...Can't recall if I had to back out or manage to turn around. I have a respirator on. Naturally I spill the glue! What a mess and I'm in a rush to get out. At the juncture to the non-vaulted area, (mind you, glue is all over me on my shirt and I'm rushing!) I slip and don't want to step through the ceiling below so I stop my fall on my ribs to one of the truss 2x4's. Darn that hurt! Never had bruised ribs before but it hurt for a solid month! And darn, I still had to repair the ceiling I was trying to avoid ruining.

So, yeah, vent pipes can leak. It's just as important to do a good job gluing them as with water supply and DWV pipes.

 

[jkuro]

ABS is cheaper. PVC is a little less noisy due to the thicker walled pipe.

 

[jetnow1]

I rep[aced a toilet for my aunt several years ago, fount the down pipe the flange was attached to was never glued. Been that way for 20 years. I glued it down before installing new toilet. Plumbers are human, they make mistakes just like anyone else, especially in tract housing where speed is demanded.

 

[D45]

All fixed and glued up

Had to run to the hardware store because a $1.29 plastic gasket was missing from a threaded connection on a drain pipe....no idea how it never leaked

 

[FredWanaker]

I think had that been me they would have found me 20 years later.

 

[paredown]

I had a black spot in my vaulted master bedroom ceiling. Darn. Used a borescope to poke through and look up there. Near a vent pipe. Darn. Poked one of my fiberglass electric "fish" poles through to mark the spot and get all the way through the insulation. So there are scissor trusses up there to create the vaulted ceiling. At 69 I crawled up there and moving sheets of plywood ahead of me so I could get to the location. Sure enough, bad glue joint (not the first bad or nonexistent glue joint I found in this year 2000 built house). I can barely reach the spot. Good excuse to buy a 12 volt milwaukee sawzall (18 volt one was too heavy to hold at arm's length). So I cut out the bad stuff, have all my tools and glue, etc. up there and make the repair. Getting out of there was tough...Can't recall if I had to back out or manage to turn around. I have a respirator on. Naturally I spill the glue! What a mess and I'm in a rush to get out. At the juncture to the non-vaulted area, (mind you, glue is all over me on my shirt and I'm rushing!) I slip and don't want to step through the ceiling below so I stop my fall on my ribs to one of the truss 2x4's. Darn that hurt! Never had bruised ribs before but it hurt for a solid month! And darn, I still had to repair the ceiling I was trying to avoid ruining.

So, yeah, vent pipes can leak. It's just as important to do a good job gluing them as with water supply and DWV pipes.

Days like these make you wonder why you didn't hire a professional... and yes, bruised ribs hurt like the devil!

I have found the occasional non-glued connection over the years--I assume it is just forgetfulness on the part of the plumber--unless it is a whole run, and then I think bad thoughts...

 

[no704]

Attach your shop vac to the stack to pull a vacuum on the pipe and apply glue to the joints, it will **** it into the fitting.

 

[HoosierMark]

I built my house 7 years ago. Plumber ran all the vent lines tied together in the attic and even one down to the future basement sump for future bath. Decided to put the bath in this year. Carefully cut the outgoing line to septic expecting the pipe to be filled from the rough in end up to line (about 4 feet). Turned out to be no big deal catching it in a five gallon bucket. No problem cutting vent line as it is an air line with no water, wrong. Drain line had almost as much water in it from condensation and rain over the years into the vent pipe. If you figure you get say 10 inches of rain a year, that has to go somewhere, typically the lowest point. Talked to the plumber and he said, yes, we experience that now and then. I am sure all the lines were glued or they would have leaked in places.