RV Antifreeze
I just came from an RV repair place and the owner warned me not to use RV antifreeze containing alcohol because it deteriorates the rubber seals. He then went into a sales pitch for his own rv antifr...
Forum Discussion
suprz wrote:DrewE wrote:
A gallon down each drain? Exactly how large are the P traps in your RV?
A cup or so is sufficient in nearly all cases.
Yes, cause there's always something left in the holding tanks too, no matter how long you drain them for.
At least on my motorhome, there is precious little left in the holding tanks after letting them drain for awhile provided the RV is level or tilted towards the drain (driver's) side. The outlet is molded in even with the bottom of the tanks, and so they would drain as fully as a bathtub. The teeny bit of water left in the holding tanks has plenty of room to expand. The piping between the tanks and the drain valves are the main place there to be wary of, and they do get empty--or close enough to call it empty for any practical purpose--with a good drain.
A cup or so down each drains is sufficient. A gallon down each drain is overkill. It won't harm anything, but it's unnecessary extravagance.
