Originally Posted by Ketchum
On our 73 Tradewind, the black tank dump valve seems to leak a bit. Could that be the result of an old, dry sealer?
If so, is that something that is replaced now and then? Can it be lubricated or softened somehow to make it seal better?
Your valve is 35 years old.
Messing around with it, can cause health problems for you and anyone that may be near your trailer.
Taking that chance ruins the purpose of Airstreaming.
BS, means "be safe" not sorry.
Those valves cost a whole lot less than you would spend on doctors care.