The second is a grey water tank that holds dirty water from your kitchen sink and shower.
Rv black water tank valve leaking.
In some cases the 1 5 inch gray valve gets sticky over time especially if the rver is not using his rv full time.
The contents inside the valve dry out causing the valve to stick.
Did any water leak out.
The logic behind this is that if one is broken it may not be that long before the other one goes bad.
The last one is the black water tank.
Ion a black water tank it could simply be leaking from around the 3 inch pipe from the toilet or the smaller vent pipe requiring nothing more than new sealant.
The drain valve or your rv s dump valve is the spot where all your plumbing pipes for the holding tanks come together in your rv.
Some rvs might lack the grey tank the black tank contain all the dirty water from the kitchen sink toilet and showers.
To determine which valve is leaking you should have your rv waste tanks empty.
In this article we shall focus more on the black water.
The rvers are usually referring to the black 3 inch gate valve on their black holding tank.
With the wastewater valves closed and the black cap off place a 5 gallon bucket under the sewer drain port.
Most rv parks and campgrounds are absolutely phobic when it comes to the issue of a leaking black water tank drain valve.
You can check the vent pipe from up on the roof.
Close all valves then go back inside the rv and add several gallons of water to just one tank.
Sewage from the black and gray water tanks are plumbed to this valve to allow you to dump the waste at an approved dumping station.
It holds dirty water from your toilet.
If it s noticeable driving down the road it can result in a citation and fine as well.
Wait about 30 minutes then head outside and slowly uncap the waste pipe.
If a vent pipe were to drop it usually drops into the tank through a rubber tank fitting.
Run about 5 gallons of water into the gray water tank through the kitchen faucet.
That will be the smaller wastewater valve.
Proper method of lubrication.