I’ve always poured antifreeze down the drains. I didn’t start pushing antifreeze through the plumbing until I installed the SeaLand toilet and the flush valve froze and cracked the first winter. After that, antifreeze is required. I bet now that the SeaLand is standard equipment you’ll see the winterizing procedure changes from the factory.
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2007/21 TM 3326 (Pride of the Fleet)
2000 2720SL (Rebuild Project)
2002 2619 (Parts TM)
SMARTER THAN GOOGLE!
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