Boss onto horizontal 110 waste

Oli Clark · Dec 10, 2018

Hi all,

Trying to plan my bathroom and i want confirmation that it’s ok to boss into toilet waste under floorboards (bungalow) as shown in the pic below (boss just clipped on, not drilled/welded yet). This is ‘down stream’ of the toilet itself. Also, assuming this is ok, how many bosses can one use? (Eg 1 for sink, one for bath etc).

I want to limit the number of holes in my external walls (tyvek tape is expensive!), so would like all the waste to go out though the soil pipes if poss.

Trying my best to learn and make sensible decisions so that I can talk sensibly to my plumber.

Cheers,

Oli

Ben-gee · Dec 10, 2018

Yes that’s fine, as you have it on the top of the 4”. Put as many as you want!

Oli Clark · Dec 10, 2018

Cheers. It’s what I thought, but I wanted to double check first!

Best · Dec 10, 2018

Is that underground 110mm pipe?
I heard it won’t solvent weld.
You could use junctions, although extra money and also consider the possibility of using a 110 junction to come out in 110mm to use for to connect to wherever you want, if it suits below your floor layout

Ben-gee · Dec 11, 2018

You can solvent weld brown/orange pipe, done it several times successfully.

Best · Dec 11, 2018

Ben-gee said:
You can solvent weld brown/orange pipe, done it several times successfully.

From what I read, some makes of orange underground pipe is not suitable for solvent weld, but confusingly some are.
Never done it myself

king of pipes · Dec 11, 2018

You can't solvent weld onto underground pipe its either cut a section out and use a bossed tee and a slip coupling or you could use a mechanical boss adaptor . Cheers kop

Oli Clark · Dec 11, 2018

Thanks for all the replies... is there anyway I can tell what sort of pipe it is? What i know is that it’s 110mm, and it’s inside, under the floorboards, but not *underground*. It’s basically a branch connection into a stack outside.

If I can’t use a strap on boss, can I use a tee and a manifold?