Honey wagon question
So as not to high jack another post, I'll ask my question here. I'm reading to my DH about honey wagons using vacuum to empty RV holding tanks and tanks possibly being damaged. He says it can only...
Forum Discussion
SDcampowneroperator wrote:
every rv has atmospheric vents from the waste tanks. There are no one way (check valves) valves that could permit a vacuum while the tank is being suctioned.
Your tanks and piping cannot be damaged by a pump out service unless you block the vent.
Yes, honey wagons do create suction with diaphragm pumps that can lift water considerably. Waste tanks are vented up through the roof without obstruction. No possible vacuum in tanks.
I'm sorry you are wrong. I have been present when they dump my tank. (I'm the op from the other thread). When they disconnect the hose from my discharge, the vacuum is incredible. I've verified my vent is NOT blocked by running a hose down the vent.
A 1 1/2" vent cannot keep up with a 3" line with a vacuum from a pump on full throttle.
