I think you also want to put a one way valve on the out line from the tank. That way/in you hook up to city water it won't allow water to push back into the tank. That's how mine was set up. They also put a t-fitting in the out line from the tank. That t then has a shut off valve on it and leads down through the floor toward the pavement. Works great when I want to drain out the tank.
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'03 Freightliner FL112, 295" wheel base, with '03 United Specialties 26' living quarters, single screw, Cat C12 430 h/p 1650 torque, Eaton 10speed , 3.42 rear axle ratio
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