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Author Topic: Help adding shower/tub and grey water tank to horse trailer.  (Read 144 times)

This is more of a plumbing question. I am in process of adding a shower/tub and grey water tank to my 4 horse trailer with living quarters. My grey water tank will be mounted directly under the tub. What issues will I experience if I let tub drain straight into the grey water tank with out a P trap?  Should I run a vent pipe up from tank and out through the roof while I am building my walls? Any ideas or suggestions are warmly welcome. Thanks Kenny

Rene T

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Re: Help adding shower/tub and grey water tank to horse trailer.
« Reply #1 on: July 18, 2017, 07:29:34 AM »
This is more of a plumbing question. I am in process of adding a shower/tub and grey water tank to my 4 horse trailer with living quarters. My grey water tank will be mounted directly under the tub. What issues will I experience if I let tub drain straight into the grey water tank with out a P trap?  Should I run a vent pipe up from tank and out through the roof while I am building my walls? Any ideas or suggestions are warmly welcome. Thanks Kenny

Welcome to the forum Kenny.
Yes you'll need a trap unless you want smell that yucky stuff all the time. The vent will allow the tank to drain fast and let the smell out of the tank above the trailer so you should have one. Also the vent will stop the water while draining from sucking water out of the P trap.
There's another alternative then a P trap and it's called a HEPVO waterless trap. I have a couple in my RV and never had any issues.
https://www.youtube.com/watch?v=tDNh7lfcIYQ
« Last Edit: July 18, 2017, 07:35:10 AM by Rene T »
Rene & Lucille & co-pilot Buddy
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2011 Chevy Duramax 2500 HD 4X4
2011 Montana High Country 343RL
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& Florida Snowbird in Lakeland FL

Re: Help adding shower/tub and grey water tank to horse trailer.
« Reply #2 on: July 18, 2017, 10:12:57 AM »
Thanks so much Rene. The HepvO trap is really interesting and looks like it should be the fix for me since there will be a lot of time that the camper will not be used and the risk of P trap going dry is increased. I will look into the HepvO. Thanks again!

 

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