Teardrops n Tiny Travel Trailers

by **Iconfabul8** » Sat Aug 20, 2016 4:04 pm

McDave wrote:Well, let's try this.
1.) Small fitting say 3/8" threaded into grey tank at or near top with hose connected to 2nd 3/8" fitting threaded into existing vent pipe well above "liquid" level. This allows air to escape/displace from grey tank while sink/shower is draining.
McDave

This is kinda what I've been thinking. I think a hose would do the trick. Only I have been scheming a way to do it all from just one entry into the tank.

by **McDave** » Sat Aug 20, 2016 5:43 pm

@ Iconfabul8,
Well, you are a crafty little craftsman. This should be good. Won't be the first rabbit to come out of your hat. I'll hold my applause till the big Ta-Da, but you've got my attention. :twisted:

McDave

by **Id10t** » Sat Aug 20, 2016 7:57 pm

Iconfabul8 wrote:
McDave wrote:Well, let's try this.
1.) Small fitting say 3/8" threaded into grey tank at or near top with hose connected to 2nd 3/8" fitting threaded into existing vent pipe well above "liquid" level. This allows air to escape/displace from grey tank while sink/shower is draining.
McDave

This is kinda what I've been thinking. I think a hose would do the trick. Only I have been scheming a way to do it all from just one entry into the tank.

Sounds like you need a dishwasher drain connector.

mcalpneplumbing.com has some great products. We used them in our racecar trailer. Shower drains are fantastic for shallow use.

What I have found vent wise in our trailers is the amount of water flow down the drain is so minimal compared to a house/ real plumbing that is doesn't really matter. Even if you ran the sink full tilt with the shower running it would be very hard to overwhelm the drain pipes and inlet into the gray water tank. We use the hepvo under the sinks and the shower with no vents. I understand the concerns about the air displacement but again the pipes never get full enough for that to be a problem. The vent has more to do with helping drain the tanks than anything else. The air admittance valve helps solve that problem.

Now I will say that if anyone adds a second story with another shower an sink your on your own. :frightened: