Hepvo waterless trap on Casita

[shane n]

While out camping I did the HEPvO waterless trap thing. Pretty easy and had to glue just one connection. No more p-trap, shower valve or going outside wet and naked at 5:00 am to open the shower drain.

hepvo on You-tube

[Al V]

what stops water from going up in to the shower? like what happens when you for get to shut the drain valve.

[Phil Underwood]

excellent write up on it here, have to be a member to read and view the pics though

http://www.casitaforum.com/invboard/...showtopic=3493

[Al V]

neat read! sound like a great mod

[Morgan]

Shane,

Because your Hepvo valve and the line is below the level of the entry to the tank, you will have water standing in that part of the plumbing.

All the other similar mods I've seen (On Casita Forum), kept the plumbing at or above the level of the entry to the gray water tank.

[shane n]

Shane,

Because your Hepvo valve and the line is below the level of the entry to the tank, you will have water standing in that part of the plumbing.

All the other similar mods I've seen (On Casita Forum), kept the plumbing at or above the level of the entry to the gray water tank.

The plumbing is not lower than the original I cut off. When I cut it off with an empty tank I had water in the plumbing. The valve itself should slope down, not level or uphill just to keep plumbing tight against the bottom of trailer. Every trailer is different and plumbing will vary. My application is higher than the original plumbing and the shower drains fast or faster with no back up. The little water in the line don't mean a thing and every trailer will have some regardless of the plumbing.

[shane n]

OK, I re-plumbed my hepvo valve. I had clearance issues with the factory pipes so I cheated and used a flex coupling. I hope this time I get a passing grade.

[brian m.]

Looks good Shane!