Originally Posted by engnrsrule
By code there will be one somewhere. In Massachussets it was in basement. The main line out from the house will be below frostline and the clean out would normally be dry so not a freezing issue. It may be near a main vent stack which you should see on roof above where toilets are.
That probably explains it - I suspect mine is in the basement where it would not be too much use to me for dumping the tanks.
A direct connection would have been more convenient but I guess for the few times I am likely to use it my Blue Boy method will work ok!
Thx ........ Brian.