Cutting hole in sump pit

[Kg5544]

I need to cut a new 4 3/4” hole in my sump pit to add a drain line for a toilet. Would a hole saw accomplish this? What is the best way to go about doing this? I believe the pit is fiberglass.

 

[Twowaxhack]

I use these to connect pvc to Fiberglass basins. UNISEAL - 4 Inch Tank to Pipe Adapter - The Uniseal Warehouse

Takes a 5” holesaw. Pro tip :Bevel the end of the pipe and lube it.

https://www.aussieglobe.com/4-inch-...xoCg9rY-qBb4G4ug-mQJ3NwkJuRG7qh4aAln_EALw_wcB

 

[Twowaxhack]

Here’s one on Amazon
https://www.amazon.com/UNISEAL-Flex...t=&hvlocphy=9012990&hvtargid=pla-571874507508

 

[CT18]

I need to cut a new 4 3/4” hole in my sump pit to add a drain line for a toilet. Would a hole saw accomplish this? What is the best way to go about doing this? I believe the pit is fiberglass.

Whoa, toilet dump into your sump. Something isn't right there. Is it a sewage ejector sealed pit

 

[breplum]

O.P., a sewage ejector system for plumbing is not called a sump pit.
A sump pit typically refers to ground water only.
Also, bathrooms with toilets only need 3" pipe size, not 4"