Boon Docker wrote:
wildtoad wrote:
Pour some water down the shower drain and sink to fill up the p-traps which are used to prevent odors.
That would work just fine if there was black water in the grey tank. :B
Gray water smells as bad as black water.
To the OP - my two solutions have already been mentioned. Be sure the vents on the roof are closed. When you drive with them open, the venturi effect causes a vacuum in the MH and can draw odors out of the tanks. And, be sure that all of the traps, sinks, toilet and shower have water in them.
