I'm installing a toilet. The flange must be horizontal, but the waste pipe must slope down from horizontal. Standard elbows are 90°, 60°, 45°, and 30°. How do I bend the PVC waste pipe down a little?
Code requires slight slop to the drain line, however, only from the p-trap on down the line. So any normal fitting such as a 30,45,60 or 90 will work.
You must have a p-trap to prevent sewer gas from entering the home.
Check your local building code for specifics.
Why would I use a p-trap in a toilet waste line?
My error, I was thinking of a previous question about sinks when I answered your question.
A p-trap is not required, the line needs a slight slope when installed, you can use standard fittings, your local building code will specify the slope required.
The standard slope is 1/8"- 1/2" per foot depending on local code, most plumbers try to make it at least 1/4 inch.
Contact your city building department for the exact specifications required in your area. If the job is to be inspected the
local code must be followed.
This brings us back to my original question: what standard fittings do I use to create such a shallow slope? Thanks for following up.