It is 3 1/2" pipe size. You may be able to find a 3 1/2" x 3" or 2" bushing to connect the pump discharge into. that is about the only fittings you will find for that size, other than plugs.
: I have a sewage "Y" pipe that is halfway cemented in the wall of my basement and is about 5ft up from the floor that leads to my septic tank.
: One part of the "Y" services the the drain needs of my house and the other is a cleanout plug. I have added a sewage ejection system and wanted to remove the cleanout plug and add a PVC
: "Y" to add my new 3" drain line. After removing the plug I tried to install a 4" male adapter but the pipe is not actually 4", it's slightly smaller. The people at the hardware say it's
: old plumbing with odd sizes. Not enough of the "Y" extends past the wall for me to cut it and add
: a boot. Do they make adapters for this old stuff ? Any ideas ?
: Thanks Again !
: Thanks for all your help, I'm almost finnished with the project.