nicktheplumber
Answers:
–4″ CI pipe is heavy, and a stack going up through your roof can weigh hundreds of pounds. If you are cutting into a vertical stack, you should support the pipe above and below where you will make the cuts.The pipe should already have been supported at several points when it was installed, but you don’t want it to move when you cut it. The 5 foot cut out section will be hefty but you should be able to manhandle it. If it’s vertical or slanted, make the lower cut first and then the opper. If it’s horizontal, support the middle with a cable or rope before you cut it out.
–If you are slicing in a section of no-hub CI, you can use 4″ Mission/Fernco no-hub connectors. If you are splicing in 4″ plastic pipe you need to use special transition couplers, such as the Fernco Proflex. The Proflex couplers have a smooth solid SS band 9as opposed to the corrugated no-hub coupler band, along with a beefier rubber gasket. This is needed to accomodate the slightly different ODs of plastic and CI pipe.
