cable dump valves

[Jazz38]

Without pulling the bottom off my 2008Laredo 5th wheel to gain access to my holding tank cable operated dump valves, what is the best way and what product should I use to lubricate the valves?

[bobbecky]

I have not used this yet, but will get some in the near future. I see Thetford Drain Valve Lubricant advertised in Camping World, and assume this is available at most RV shops. It says to use 2 ozs per 40 gallon tank, so you put it down the drain like your normal tank treatment and it will lubricate the drain when you empty the tank. I'm guessing this is a water soluble oil type lube that mixes with the water and coats the gaskets in the valves.

[Ron]

Before you pull the coroplast off the bottom of the trailer you might want to check if you can gain access from inside the cargo area, behind the removable panel. On our Montana I can access 2 of the 3 valves, just a thought...