Home - Waste Dump

[Lakejumper]

I’m having my sewer clean out moved out from underneath our home. I want to be able to dump the RV in it. What size line should we use, 3” or 4”?

[Lynnmor]

If you have a septic tank, there should be a line in, a line out and a cleanout in the lid. You don't want to dump in that cleanout, instead you should have a tee in the line that goes in. I suspect that your "cleanout" is a Y on the pipe from the house to the septic tank and that would be fine for dumping as long as you maintain a capped Y for future clogging issues. For your dump line, 3" or 4" is fine, the most common size is 4".

In my area they are pushing for installation of a manhole in the tank lid so it can be properly inspected. Yes, pumping and inspection is now required.

[corvettekent]

Mine is 4" but yours should be what ever size pipe that you connecting to.

[ford_truck_guy]

We don't have one at home, but at the shop ours is 4"

[RAllison]

I have a 4" pvc line for my cleanout, works fine.

[rk911]

sewer clean-out access are almost always at least 6"...ours at home is. i have our line cleaned out annually to prevent nasty backups. the guys were here yesterday and used a 6" cutter.

[Dick_B]

I'm thinking the plumber would decide that but I think ours is at least four inches; probably more like 6.