hampal
Advanced Member
Both of my gray tanks are draining incredibly slow but the black tank drains like gangbusters.
My sewer hose is going over a low curb before it gets to the sewer so I have to lift the hose and walk the last bits of water out of it to make it drain into the sewer. I've noticed that the water wants to run a little bit back uphill as I'm doing that. It makes me think that there's some suction or vacuum on the other end. Could a blockage on the roof vent cause this? I think if the roof vent were blocked it would slow down the black tank drainage too but that's coming out at full force.
My sewer hose is going over a low curb before it gets to the sewer so I have to lift the hose and walk the last bits of water out of it to make it drain into the sewer. I've noticed that the water wants to run a little bit back uphill as I'm doing that. It makes me think that there's some suction or vacuum on the other end. Could a blockage on the roof vent cause this? I think if the roof vent were blocked it would slow down the black tank drainage too but that's coming out at full force.
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