Does a washing machine drain need a vent trap?

Question

Finishing basement...hubby needs to know.
Thanks.

Thanks, guys!
Can it be tied into a sink or tub trap?

Answer 1

Depends on your code. Generally if you are less than 3-6 feet from the stack, you don't need a vent. Over 6 feet, definitely vent.

Mine is about 5 feet from a vented stack, and it drains fine through 2" pvc.

Edit:
Vent and trap are different. You may not need a vent (above); you definitely need a trap. If you connect in before another trap, it may back up the fixture.

I would use a separate trap. Just make a standpipe with a trap below it. They sell these traps at home depot.

Answer 2

Any and all drain lines that lead to the main drain line must have a trap. The trap is there to stop poisonous gas from entering your house and killing your family. The vent is needed if the trap exceeds the distance set by your local code from the main line. The vent stops the water in the trap from being sucked out as the water drains by breaking the vacuum.

Answer 3

Yes, you will need both a trap and a vent. You can run an additional sink into the washing machine trap, but you will not be able to run the washing machine on the sink trap unless your sink is large enough to hold all the water from the washing machine. The trap on the sink will be too small to handle the load of the washing machine.

Answer 4

Vents and traps are 2 different things with completely different jobs. The vent is a pipe that is almost always in the wall and should stick out the roof of your house, the purpose of this is to allow air in the pipes so that the waste water can flow without bubbling up.......The p-trap is shaped like a P so water will stay in the trap preventing Oder's from the sew to escape into your living area.

Answer 5

In some cases, it would be best if a vaccuum relief is placed in the drain line. it will prevent the flow from causing a vaccuum and sucking all of the water out of the trap. it also keeps the sewer gasses in the pipes, and out of your house. These gasses are not only noxious, unhealthy, and (since there is a strong methane componant,) can build up and cause explosions.

Answer 6

Depends if there is another trap downstream from where you plan to put in the washing machine. Typically there is and if there is, then you do not need another one.

Answer 7

Yes- so the water can flow out- it wont flow in a closed system-if your drain hose has a good seal into the drain-you really need one.

Answer 8

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after- leave vent as is, dont tie into it befor the trap- sewer gas will get into landry room

Answer 9

in the UK you can buy a automatic air vent for soil&wstepipe,called a durgo valve which means the vent pipe no longer has to discharge outside

Answer 10

Mine isn't and it works just fine, but its not in the basement