[saindon]

My house was built on a slab, there is a 2" PVC drain coming out of the concrete for my washing machine drain. There is no p-trap and it is the end of the sewer line. I am installing a cleanout as well as venting out the roof. My Question is am I required or should I install a p-trap.

[speedball1]

My Question is am I required or should I install a p-trap.

Yes! You must install traps on every fixture that has a drain.(see image) If you don't you open your house up to the city sewer which will allow sewer gas to enter your home. Good luck, Tom

[saindon]

My house was built on a slab, there is a 2" PVC drain coming out of the concrete for my washing machine drain. There is no p-trap and it is the end of the sewer line. I am installing a cleanout as well as venting out the roof. My Question is am I required or should I install a p-trap.

When you say all fixtures does that include toilets?

[uniquehome]

I don't think it would include toilets as the trap is in the toilet itself

[afaroo]

When you say all fixtures does that include toilets?

See the picture below and you be able to see the toilet installation, Thanks.

John

[speedball1]

When you say all fixtures does that include toilets?

Of course. Toilets have a built in trap,(see johns image) as do most floor drains. Regards, tom