I've never noticed a problem when dumping our tanks. If I thought it was going too slow or didn't have any pressure behind it after I opened the valve I believe I would be concerned about a restriction somewhere.
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2011 GMC 4X4 dually CC, 6.6 Duramax with Allison Transmission. Formally 2001 Montana,2007 3400RL Montana, presently 2018 3401RS Alpine.
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