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If you are going to install a Valtera gate valve at the sewer discharge, I'd suggest getting the one that is clear and has a water hose hookup. That way you can back flush your black tank (gray as well) and see when the water is clear. I was amazed with how inefficient the stock black tank flush system is after I used the back flush system.
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2018 Montana 3121RL, 35 feet of home away from home.
2018 Chevy 3500HD, 4WD, Double Cab, SRW, 8' bed, Summit White with stump pulling diesel.
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