TURNKEY wrote:
CA Traveler...the black tank itself is vented otherwise how would you dump at all? Right? The hose won't clog, everything is pretty liquid. Now leaks...... :)
Of course the tanks are vented.
Consider the overall problem. The tank and hose which goes uphill are full of liquid. You lift the hose at the RV and nothing happens because it's a closed liquid system and air has no way to enter the raised portion of the hose.
Fill a hose laying on the ground with the open end elevated several feet. Close the valve to simulate water in a tank. Lifting the hose does not drain it except when lifting near the open end.
When you try this with the RV be sure to have a cap for the open end of the hose so that you can transport it somewhere to dump.
