Repair coupling vs Mission band

[skidvd]

I'm going to be adding a new branch to my under concrete main sewer line (4") for a new bathroom When I splice in the new connections, should I use a repair coupling or a clamped mission band for this?

 

[Terry]

The Mission is easier as you can roll the rubber back and then flip it back over once the fitting is in-line.

 

[Sponsor]

 

[skidvd]

Thanks Terry. While it makes sense that the mission is easier, are there any reliability concerns or other reasons to consider the repair coupling approach as this will be buried under concrete and not accessible?

 

[Jadnashua]

The bigger the pipe, the harder it is to slide a repair coupling to where it needs to be before the cement starts to setup. IOW, good luck should you try to use one!

 

[Sylvan]

I totally agree with Terry as I only use mission couplings and NYC we never were allowed to use the crap that is all rubber with two bands

Relying on a piece of rubber for integrity just does not work in the long term

 

[skidvd]

ok, got it - thanks! With the mission then, I assume I attempting to have the cut ends of the pipes as straight as possible and butting into each other as close as possible inside the mission band - correct? Any tips for ensuring a good connection in the band?

 

[Terry]

The piece that gets cut in is 1/4" shorter. There is a ridge in the rubber seal that fits in that gap on both sides to help center it.