To P-Trap or not

[JCQuick]

Ok here is the deal I'm hooking up a water line from my house to the shop for a hose bib and water for a inside sink. The drain is just going to empty out the concrete block wall about 2ft above grade with an 90 to direct it down . And maybe into a make shift septic tank

Would you bother with a P trap or not?

This is what I just installed its only for washing hands



and well this part I really don't like and need the GJ guys to make suggestions and or better plan BTW my flame suit is on

 

[csp]

Only need a P-trap if it's going into a tank/lines where sewer gases can accumulate.

 

[larry_g]

Years ago I did as you did but on the outside I ran the waste into a 6-8' section of perf pipe to keep from having a puddle or mud mess at the drain. It worked fine for the small amount that I used it.

lg
no neat sig line

 

[plumbing101mike]

Definitely use the p-trap. Keeps breezes and bugs from coming up through your drain.

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[kelpaso1]

Definitely use the p-trap. Keeps breezes and bugs from coming up through your drain.

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Good advice. Also run the water once a week to keep the trap with fresh water so it doesn't stink or dry up.

 

[BADSIX]

Years ago I did as you did but on the outside I ran the waste into a 6-8' section of perf pipe to keep from having a puddle or mud mess at the drain. It worked fine for the small amount that I used it.

lg
no neat sig line

do this and use the p trap for any odors that might come back.
Jay D.

 

[rsanter]

You don't need the trap.
If you set it up like the picture I would add one of those downspout things that will direct the water away from the structure.

Ideally....and if I was you I would go three feet from the structure and auger a hole that I inserted some perf pipe into. Then dump the drain water into that

Bob

 

[ducksface]

There is a spring loaded end cap used for yard irrigation.
Take a look at one for keeping critters out.
With the cap you don't need to run the sink weekly.

If you can't find one easily I'll send you a picture.
HD has them near their sectional long patio drain stuff.

 

[JCQuick]

Years ago I did as you did but on the outside I ran the waste into a 6-8' section of perf pipe to keep from having a puddle or mud mess at the drain. It worked fine for the small amount that I used it.

lg
no neat sig line

Yes I'm going to do something like that, being in Florida the soil is real sandy even during heavy rains I don't have standing water back there

Definitely use the p-trap. Keeps breezes and bugs from coming up through your drain.

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that was my thinking was the bugs getting in

There is a spring loaded end cap used for yard irrigation.
Take a look at one for keeping critters out.
With the cap you don't need to run the sink weekly.

If you can't find one easily I'll send you a picture.
HD has them near their sectional long patio drain stuff.

I will look into that thanks

I still need to figure a better outside set up. mainly because what I have there now is indoor plastic which is not going to hold up to the Florida sun well

 

[ducksface]

Just paint the plastic with house paint. That'll add ten years of life.
Easy.

 

[rburke65]

Bugs and mice possibly. The trap looks as if it's already installed. And yes....paint it.

 

[James E]

P trap isn't that much additional work and will keep the bugs, snakes and baby gators out.

I do like Duck's idea of a flap at the end. Biggest issue you will have is wasps getting into the tube, building a mud or paper nest near the opening and blocking the pipe. If you turn the pipe down 90 degrees towards the ground, this will almost certainly happen.

 

[59 wagon man]

where the elbow is you should have an 1-1/2" pvc dwv t. the pipe you have connected the trap to is not supposed to go outside.

 

[csp]

where the elbow is you should have an 1-1/2" pvc dwv t. the pipe you have connected the trap to is not supposed to go outside.

Really, as if this setup is otherwise up to code?

And why a T? There's no vent.

 

[EOC_Jason]

I would leave the p-trap in for reason stated above...

For drainage I would do a short perf-pipe with a pop-up on the end just in case...

 

[58Yeoman]

I didn't install a P-trap on my sink, as my shop isn't heated in the winter, I didn't want it to freeze. Mine goes straight out and into pvc pipe which runs along the outside wall into my corrugated drain tile behind the shop. I agree that the P-trap will keep out undesireables.

 

[Radix2]

Yes use a trap.

...but that is not a P-trap - it is an S-trap.. haha.

 

[GSRinmyCRX]

duckbill check valve on the outlet is what you need.

Levi

 

[Lassen Forge]

If you don't, and you knock your wedding ring off the edge of your sink while you're washing your hands, you can kiss your ring goodbye...

Put the trap in.

 

[RegeSullivan]

I would want to keep the critters and bugs out and definitely would want to keep odors out if draining into a tank or a makeshift septic system. So... if it were me I'd put in a trap and vent. An aav (air admittance device) would be fine for this situation. No vent and you will **** the water out of the trap especially when dumping bucket or draining a full/partially full sink. This is simple, cheap, effective and trouble free.

The duckbill or check valve would work fine only if you are draining to daylight. They sometimes stick or gum up and require a little maintenance if you do not have enough volume/pressure or are not used much.

 

[Markfothebeast]

I'd just put on a check valve. Cost is $6 - $10. That way you don't have water sitting in the bottom of the sink. I'd put it on the end of the drain.

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[RegeSullivan]

I'd just put on a check valve. Cost is $6 - $10. That way you don't have water sitting in the bottom of the sink. I'd put it on the end of the drain.

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Lost me on this one... Why would a P-trap or no trap leave water sitting in the bottom of the sink vs the check valve?

 

[kbs2244]

You don't need it, but if it is already there you don't need to remove it.
No sewer gases involved.
A coat of paint will protect what you have from the sun and prolong it's life.
Your outlet distance from the ground should discourage mice, but the wasps may be a problem if you don't use it often enough to flush them.

IMHO, your wedding ring would end up outside, by the wall.

 

[Viper98912]

If you don't, and you knock your wedding ring off the edge of your sink while you're washing your hands, you can kiss your ring goodbye...

Put the trap in.

Except that he'll just walk outside and pick it up right off the ground

 

[PT Doc]

Use the p trap. Use the proper exterior couplers.

If the ground cover is rock with proper grade then running a 90 with a 5 foot run would get the water away from the structure. If your grade is kind of funky the a 90 that is ground level pointing parallel to,the structure with a short piece of pic then another 90 pointing away from the structure would allow to adjust the discharge pipe to the grade of the soil.