Sink drain vent for bottom drain?

[sgtpeper67]

Does anyone have a creative design for a sink drain vent if the drain is underneath the camper? Everything I’ve been able to find shows the PVC or Y-splitter/hose method for campers that drain out the side.

[Mustang65]

We have a bathtub drain vacuum vent that seems to keep going bad and allowing the odor from the gray tank to seep into the bunks above the rear storage area.


I am replacing the 3rd Vacuum vent that screws on to a pipe connected to the bathtub drain with a reducer to 3/4" PVC pipe. I have 3/4" PVC that I am going to run from there to the gray tank vent tube also accessible in the rear storage area. It will become a semi-closed system with no access to the air in the living areas. Should eliminate the odors.


I have been doing this for at least 3 years, finally getting around to it.


Don




My Registry

RVing with SOLAR

[sgtpeper67]

Interesting. I haven’t had an odor problem as of yet but this is the first time plugging into the sewer for grey water. The sink drains glacially at best. I’ve read about this problem before but most of the PVC options seem to be for drains on the side of the camper. For whatever reason Jayco thought it best to put my grey water drain on the bottom...

[bankr63]

Is it still a standard 3/4" hose connector (like the side mounts)?

I would just add a y connector, then a small length of hose on the second arm that runs above the sink level and is open to air. If you are into a larger sewage system, then I would probably run it above the roofline, but we only used a bucket for ours and then dumped in the local pit toilet, so smell was never an issue.

Note, short minimal lengths for both drain and vent hoses is essential. If you are trying to drain through a coiled 25' garden hose, it will take a long time to drain. We used about 3' down hose to the bucket only.

[sgtpeper67]

Great recommendations. Thank you!