Question Grey tanks open

[Rosy]

The other reason to leave the valve closed? I believe a friend of mine called them "sewer gnats".

 

[JRS]

Great info above. Keep it closed. It's so easy to dump and takes little time to complete. On the other hand one "active person" on this site has electronic/motorized valves which open and close with a click.....

 

[AbdRahim]

I am a believer in treating gray like I do black. I have spent a long time trying to find the balance of the perfect dump sequence.

This graph and data point shows my current process.

Basically, if the gray tank is 65% and black is below 50,then dump gray.

As we approach higher levels hold gray longer.

My rules never dump black below 85, and never let a tank exceed 95%.View attachment 13342View attachment 13343

Definitely suffering from engineeritis. Are you getting treatment?

 

[Gizmo]

We leave our gray tank closed except on laundry day we leave it open. I do know several full-timers that have macerating toleits that not only leave the gray tank open but also the black tank. Now if you have a drop toilet you need to keep the valves closed but these guys have been doing it full-time for years. They set the macerating toilets for the highest water level and one guy has had the same coach for over 8 years and has done since day one. Both of our toilets are macerating type but we old fashion and keep the tanks closed till dumping.