Fred,
There is a converter/ adapter for the Coleman units that would allow you to connect into the existing drains in the walls. You may have to contact Coleman but I think it was discussed in a thread right here on our forum. This would allow you to use the Coleman units and drain them properly.
Good luck
__________________
Brett G
WBCCI #5501 AIR # 49
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1978 Argosy 28 foot Motorhome
Wise men talk because they have something to say; fools, because they have to say something. -- Plato
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