Bath waste into cast soil pipe leaking

Discussion in 'Plumbing and Central Heating' started by MugabesDeadCat, 3 Feb 2013.

  1. MugabesDeadCat

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    In the process of fitting a new bath and when we exposed the soil pipe, which is cast iron, the 40mm solvent pipe coming off the bath its terminating into a branch on the soil stack which is about 50-55mm in diameter. All the previous installer has done is shove the bath waste into that branch and siliconed it up, but its now leaking like crazy. Anyone any ideas how you'd connect 40mm solvent pipe to 50-55mm cast soil pipe?
     
  2. cozzmic

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    Take out plastic, clean and dry cast socket and plastic. Refit plastic and pack in something to take up the space (rope, poly bag, caulk preferably) and centre the pipe, while leaving enough room to seal with pure cement. Pack in the cement and smooth off, leave to dry job done.
    Check cast is not choked as cast is inclined to fur up with rust and hair.
     
  3. MugabesDeadCat

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    Cheers cozzmic. Pure cement? As in Portland cement?
     
  4. cozzmic

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    Yes, it sets rock hard and will make a permament fix. Used to be used on old cast iron central heating connections where the pipes were socket and spigot.
    I connected onto the said pipes and used same arrangment and as long as set it will take pressure. Your waste won't have any pressure in it as such so will be Ok..
    One thing, rough up the plastic to give the cement something to key onto.
     
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  5. Nige F

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    rapid set cement - Jetcem ;)
     

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