It holds dirty water from your toilet.
Black water tank valve.
The last one is the black water tank.
1 5 for gray water tanks.
3 for black water tanks.
Some rvs might lack the grey tank the black tank contain all the dirty water from the kitchen sink toilet and showers.
Once you can hear that it s completely empty no more sounds of water rushing through close the valve and pull the gray water valve.
The second is a grey water tank that holds dirty water from your kitchen sink and shower.
Flush valves allow you to rinse your black water tank and flush out your sewer hose in order to break up clogs and clean your tank sensors.
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To determine which valve is leaking you should have your rv waste tanks empty.
Let that drain completely as well and then close it.
The black tank collects the waste from the toilet.
Make sure to purchase the appropriate assembly for your needs.
Your black water tank is full and the drain valve is stuck.
That s a horrible enough thought to send just about any rver into a cold swea.
If you just want the valves they re available in two different sizes.
With the wastewater valves closed and the black cap off place a 5 gallon bucket under the sewer drain port.
The black tank should only contain the biodegradable enzymatic product of your choice your solid and liquid waste and septic safe toilet paper nothing else.
Connect a garden hose to the barrel see image then choose either the tank setting or the hose setting to direct the flow of water where you need it.
Pull the black water valve and let the tank drain completely.
Run about 5 gallons of water into the gray water tank through the kitchen faucet.
That will be the smaller wastewater valve.