Black Tank Flush Pressure

[catvet]

Our 2021 Alpha Wolf has the black tank flush hookup. Does anyone use an old pressure regulator when hooking the flush hose to flush the tank. I assume the plumbing to it is not made differently from the plumbing elsewhere in the camper so I worry that high water pressures could cause damage to the flush system.

[phipps33]

Unless there is a blockage in the line it shouldn’t build much pressure as it’s not a “sealed” system.

[bubbles]

The valve itself is rated at 125psi and as said is a flow through valve with pressure applied. Also it is normal for some residual water to flow back out the input port when pressure is removed; it's not black tank water. It's just the valve cavity and input line emptying.