Soil pipe boss sizes

[mfgs]

I need to boss on to an old push fit branch, however the poly pipe boss adaptors I carry are way too big. The internal diameter of the boss is around 49-50mm. Tried 50mm pipe in the boss and it doesn’t fit, a 50mm fitting doesn’t fit over the outside of it either. Any ideas what I need? Think it may be made by Marley? It looks like all the Marley boss adaptors I can find online go straight to push fit, ideally I want to use solvent weld. Also what suppliers stock Marley fittings?

 

[ShaunCorbs]

How close is the 50mm fitting to the od of the boss ?

 

[Scott_D]

Got a picture of the fitting?

 

[mfgs]

How close is the 50mm fitting to the od of the boss ?

A 50mm waste fitting would need to be 1-2mm bigger to fit over the outside of the boss

 

[Scott_D]

Wolsley sell marley gear i believe. I used lots of it on site and the push boss adaptors were always a really tight fit for waste. Never had an issue with them.