My plan for a kitchen move/extension has a critical dependency on being able to tap into an internal boxed-in soil stack for drainage. Having drilled a hole in the boxing today I've thankfully been able to confirm with a borescope that there's sufficient means and room for a strap-on boss to be used..

Given the soil pipe appears to be Osma I figured I might as well go with one of their strap-on bosses[1] too as this isn't a connection I can afford to get wrong. Too this end, I've noted from Osma's design guide[2] that 'Solvent Cement Filler' should be used. Presumably this is given the nature of the joint not lending itself to 'standard' solvent cement?

However, I've since learnt that not only does hardly anywhere seem to sell this stuff (why not?) but also that it's around £20+ for a 200g tube!

So, I was wondering if there are any alternatives (e.g. other brands, standard cement, etc) or should I just swallow the cost on the basis that if that's what's required that's what's required! Can the cement filler be used on 'normal' connections too? I was also wondering why it's in a tube rather than a tub-with-brush which I assume is easier to use?

I have also considered whether instead of the strap-on boss if I could cut the pipe and insert a bossed pipe connector[3] in between but I'm not sure if there's any slack to push the upper pipe up to allow this to work.

Mathew


[1] http://co-uk.wavin.com/master/master...oduct_detail_I
[2] Pg 110 of http://content.wavin.com/WAXUK.NSF/pages/OSMA-Soil-Waste-Design-Inst-Guide-EN/$FILE/OSMA_Soil_Waste_Design_Inst_Guide_SW206.pdf
[2] http://co-uk.wavin.com/master/master...oduct_detail_I