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
coolmom42 wrote: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.
This.
Absolutely incorrect.....
I have 30+ yrs of DIRECT involvement with 'Vacuum' and personally know what is necessary to establish vacuum and what it can do.
Even with a fully functional 1/1/2" vent line a small vacuum pump can collapse a plastic waste tank.
Why do you think 'opening the toilet flush valve' is recommended when using a pump out service?
To provide an additional source of venting (which is same size as drain line)
