Gray Water Question
We have been using our TT in the driveway for cooking and eating and washing dishes during a kitchen renovation. I have been emptying the gray water into my tote, then using my sewer cleanout for dis...
Forum Discussion
2012Coleman wrote:
I looked under both sinks and do not see this valve. There is a pipe that goes up, but it is capped off.
I do always ensure there is water in the toilet, and we use the sink in the bathroom to wash hands before dinner, and the kitchen sink for dishes - so I'm sure water stays in those traps, but I have not turned on the tub faucet. that may be the culprit unless they put the admittance valves below the sinks where I can't access them. I turn the water off at night and relieve the pressure at the faucets.
As suggested.that 'cap' is the air admittance valve.
They are installed after the 'P' traps and allow air into drain line when dumping grey tank. They keep the water in 'P' trap from being sucked out by letting air in drain line downstream of the 'P' traps.
Air admittance valves are simple design. Some use a spring to hold flapper closed, some just use an elastic tab molded on flapper to hold close. When they weaken flapper doesn't fully seat and will allow odors inside rig.
Some mfg. install them on sink & shower drains, some just on sink drains. Depends on drain pipe arrangement and accessibility.
Water can evaporate in an unused 'P' traps.....so shower can also be source of odors from grey tank. Refill trap and pour a couple tablespoons of oil (mineral, olive) into trap. The oil will sit on top of water in trap and minimize any evaporation.
Great for use in toilet bowl during storage also..keeps bowl seal lubricated and doesn't evaporate.
