There should be no access panel, just a small cutout in the plywood floor. If you look under the sink, you should see two or three red handled valves (similar to the hose bibs on your house). Not only will one of these drain your tank, but the others are tied to you water lines that run the length of your trailer alongside the furnace ductwork. So, find your water pipes and follow them until you find the valves, as a previous owner may have moved them from their original position. You'll probably find a couple of other drain valves at the rear for the bathroom.
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Cameron & the Labradors, Kai & Samm
North Vancouver, BC
Live! Life's a banquet and most poor suckers are starving to death! - Mame Dennis
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