Waste! What type?

[Andy Velcro]

Hello

I'm planning on running my shower, basin and bath waste under my floor boards. The last thing I want is a leak bringing down my ceiling so which pipe system is the most secure, push fit, compression or solvent weld. Also I'd like to join all the waste pipes together so that only one pipe exits the wall, is this a good idea?

Thanks

Andy

 

[kevplumb]

solvent
make the outgoing pipe a size larger then the incoming and fit anti syphon traps

 

[brumylad]

My tip here: Don't cut out a 45mm notch fromyour floor joist.