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Old 11-08-2010, 06:53 PM   #2
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Join Date: Nov 2005
Posts: 905

In my coach there is a large round white "thing" that is used when you remove the filter, the white "thing" goes up into the filter unit with a twist and that plugs the filter unit so that you can winterize with the filter removed.

Along with the drains you pointed out in the bottom of the water manifold compartment, our coach has a tank drain valve at the end of the tank that goes thru the floor of the compartment.
But it is small also. It takes quite a while to drain the 90 gallon tank if it is full, several hours in fact.

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