Holding tanks capacity

[AJH]

Can anyone tell me the size of each tank, or where I can find the capacity for a 2005 3475RL. It has 4 tanks. Fresh, gray, black, and galley.
OH YES, I DID CHECK THE KEYSTONE WEB SITE, AND IT DOES NOT LIST THE GALLEY TANK. But I have on.

Also if a tank is full will it leak out from under the Rig, or will it back up into the inside of the rib.

[awaywego]

You have 62 gal fresh water ( includes 10 in hw heater) and gray and black tanks are 38 gallon.
This is a link to the website. http://keystone-montana.com/index.ph...pecs&year=2005
If the tank is full and not leaking it will backup in the tub or sink. If it is leaking under the bottom you probably have a leaking tank.
Hope this helps.

[stiles watson]

Concerning you overflow out the bottom of your RV, this means you have a leaking tank. It is probably on top if it only leaks when full. If the gray tank is full, it should back up into the shower (lowest point). If the galley tank is full, it should back up into the sink. If the black tank is full, it will start "burping" and spitting water when you flush. If otherwise, it is leaking.

Since we full time, we empty tank before they get totally full. Flushing sounds different as the black tank nears full. Time to empty. The way your family uses water will dictate which tank fills first. For us it is the black tank. We dump tanks about every four days.

[dieselguy]

Sometimes if it is a small leak, the belly pan will droop down in the middle and the leak will not be noticable right away. If you push up on the center of the belly pan below the tanks or on back ... liquid may stream out from both sides of the belly pan where it contacts the IBeams. Been there, done that, have a T shirt!

[racerjoe]

Galley should also be 38 gallons

[AJH]

Great That makes sence. Keystone say black 38, and gray 72.. 72 divided by 2 is 38

Now has anyone every changed a galley tank and know the yellow number on it.

[Art-n-Marge]

Actually, 72 divided by 2 is 36, but the specs say the grays should be at 76 (not 72) hence your math would work out. According to specs for my year I have a 38 gallon black tank and a 60 gallon fresh tank. The specs for 2005 and 2006 are pretty much the same according to the model year spec sheets from the Keystone web site. The website combines both gray tanks for all models, hence the 76 gallon specification.