Home Improvement Stack Exchange
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Questions tagged [drain-waste-vent]

A drain waste vent is used to allow drain water to flow freely by permitting air the enter the system, usually through a vent stack or an air admittance valve. Use with the [plumbing] tag

A drain waste vent is a component of a home's plumbing system that is responsible for allowing drain water to run freely by allowing air to enter the system, and thus prevent a siphon effect. Since sewers are filled with gases that range from unpleasant to dangerous, vents must either allow gasses out where they can dissipate (like a roof stack vent) or use a device like an air admittance valve (that allows air in, but not out)

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Do I need vents to devices in the primary waste line?

Assuming the system below (solid is waste, dotted is vent). Do I need vents for the Sink C, Toilet C and Toilet B? They are connected to the primary waste line which is vented at the end of it. Sink C and Toilet C are in the first floor, all the…
Luiz Borges
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Is the DWV Tee in this washer service installed backwards?

This is the rough in in question. On the washer service, for the Oatey Sure Vent, is the DMV Tee installed facing the right direction?
Pat
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Manifold all vent pipes in attic to have one pipe into roof

I'm building a new house, 2 1/2 baths, laundry room & kitchen. What size vent pipe would be needed to manifold all vents into one?
user41442
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What's the minimum vent diameter required for my drain line?

I'm adding a secondary bar sink in a kitchen area, which will extend the waste pipe to it's farthest length, so I need to put in a waste drain vent pipe up the wall and through the roof. The drain pipe is 1-1/2" diameter and I'm wondering if the…
Steve Wasiura
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Amount of drop before vent stack

Redoing an old bathroom with cast pipe. As is fairly common in old houses the floor joist was cut when the toilet was installed. If the soil pipe had dropped another 6" to clear the joist would it create venting problems? Is there a standard for the…
JPC
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Vapors from washing machine stinking the garage and kitchen

This shows that there is a trap in the washing machine drainHow do I hook up a washing machine drain line to this box?. How do I clean this? Other traps under sinks have threaded connectors so I can extricate crap. And somehow my drain hose is…
Edw
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Prevent future holes in PVC vent pipe in walls

Is there any practice or products out there to help protect a PVC pipe where someone might drill into the wall in the future for hanging stuff or something. I'm considering just using metal piping for my vertical vent pipe runs through the walls.
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Need safe practice info for a very tight space waste drain problem

Please bear with me, as I am no plumber, beyond being able to sweat copper pipe, and glue PVC successfully. Thanks, in advance, for any help you can offer! Here's the simplest version of my question: Can I safely use a combination of 45 degree…
anniemcu
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When is a separate vent not needed?

I was of the understanding that every trap needs a vent and that all the vents for all the traps tie into the vent portion of the main stack which vents through the roof. I came across this diagram in a plumbing book and am confused why the laundry…
AfterWorkGuinness
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Why aren't vent stacks usually equipped with hats?

On just about every house I've seen here in the west (CA) the vent stacks are just a bare pipe sticking out of the roof. There is no hat on them. I understand that all the vent stack does is vent the house's sewage system so that water flows…
BillDOe
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How do I Secure the Vent Stack to Replace a Section of the Waste Vent Pipe?

Though similar questions have been asked 1 and 2, neither actually answer what I need. My house was built in 1950 and its iron waste pipes are 'exposed' in the basement. The Vent pipe is clogged, with rust and according to a professional. The…
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How do I determine the exact Nature of my Sewer ventilation problem so that I can correct it?

Issue: When the weather and pressure changes, my bathroom will smell terrible and the sink has trouble draining. Sometimes the sink won't drain until the pressure changes again. Attempts: Changed Toilet Flange, this resolved some occurrences of the…
Void Serpent
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Vent below window

I have a waste vent terminal that will be 2 m below a window (2 storey house). Can I leave this terminal there, or should I extend it above the windows (adding 3.5 m to it and having an ugly pipe on the side of my house)? What is up to code? What is…
Luiz Borges
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Black ABS DWV cleanout plug lubricant?

What is the best lubricant for a threaded black ABS DWV cleanout plug? Needs to be long-lasting and not deteriorate the ABS.
Monkeywrench
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What is the height for the washer box and p-trap? if the finish floor is in the garage 2ft under from bathroom floor. does it work?

Washer machine in the garage is 24" lower than the ff from the bathroom, I'm installing a p-trap 6" from the bathroom finish floor. What is the height of the washer box that needs to be? The bathroom is located on the other side of the wall of the…
E. M. Torres
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