Forum Discussion

myredracer's avatar
myredracer
Explorer II
Sep 15, 2018

Total holding tank volume for two gray tanks? UPDATE

I had to pull down the underbelly coroplast recently due to an overflowing toilet. (:M) I found that the gray tank for the bathroom is 20 gallons (per sticker on the tank). The printed factory br...
ScottG's avatar
ScottG
Nomad
Sep 15, 2018
That's a pretty standard setup - 20/40 except it was 40 for the shower/bath. We had the same combination on our last RV. Our present TT has a single 60 gallon grey tank. So it's really the same capacity.

If yours is backwards from this, you could always install a valeve at the dump connection so they combine.

About Technical Issues

Having RV issues? Connect with others who have been in your shoes.24,191 PostsLatest Activity: Jan 19, 2025