Soil Pipe - Plastic on to castiron

Discussion in 'UK DIY' started by Peter Hemmings, Sep 26, 2005.

  1. Hi,

    I am just about to start preliminary work prior to installing an en
    suite in my bedroom next to the bathroom.
    ATM the toilet has a connection through the wall onto an old cast iron
    soil pipe going into the garage floor (garage extension built onto side
    of house by previous owners).
    The pipe from the toilet goes through the cavity wall and (viewed inside
    the garage) bends right onto another cast iron "T" where a plastic vent
    pipe has been inserted to vent through a tile on the side of the garage
    roof.
    It looks like this:

    < Plastic | |
    || ||
    _______| |
    toilet ( )_______ | ** < Cast Iron
    | |
    || ||
    | |
    | | < Cast Iron into garage floor

    What I intend to do is to replace the cast "T" and pipe to toilet with
    plastic and to fit a cross pipe connector (sorry don t know exact name)
    ready to drain shower/basin about one metre to the right of "**".

    Hope you got the "drift"!

    Now the questions.
    1. How easy is it to get the old "T" off without breaking the collar of
    the pipe going down the wall.

    2. What diameter pipe must I use from the basin/shower?

    3. I assume I can fit the new plastic junction and cut out the relevant
    holes later or cut it and fit a blank?

    4. If I have to cut the old pipe (because I damaged it), is there a
    neat way of connecting plastic as the only way I have seen is an orrible
    rubber "gator" thingy!?

    Thanks
    Peter Hemmings, Sep 26, 2005
    #1
  2. Peter Hemmings

    chris French Guest

    In message <>, Peter Hemmings
    <> writes
    >
    > < Plastic | |
    > || ||
    > _______| |
    > toilet ( )_______ | ** < Cast Iron
    > | |
    > || ||
    > | |
    > | | < Cast Iron into garage floor
    >
    >What I intend to do is to replace the cast "T" and pipe to toilet with
    >plastic and to fit a cross pipe connector (sorry don t know exact name)
    >ready to drain shower/basin about one metre to the right of "**".
    >
    >
    >Now the questions.
    >1. How easy is it to get the old "T" off without breaking the collar of
    >the pipe going down the wall.


    Probably not to difficult. I had to remove a lead soil pipe from a CI
    socket when I redid a bathroom. Now that was probbaly bit easier as the
    lead is very soft of course. But no matter. the joint was sealed with
    something that appeared to be putty, might not have been, but if you
    imagine 70 year old putty you get the idea It's wasn't that hard to chip
    this out with an old screwdriver and a hammer.

    I'd probably start by using an angle grinder to remove most of the T,
    then work down the sides with aforesaid screwdriver/hammer combo, till I
    could remove the end of the T
    >
    >2. What diameter pipe must I use from the basin/shower?
    >

    Basins normally 32mm, Shower 40mm

    >3. I assume I can fit the new plastic junction and cut out the relevant
    >holes later


    I think so, but I've never done this yet.
    >
    >4. If I have to cut the old pipe (because I damaged it), is there a
    >neat way of connecting plastic as the only way I have seen is an
    >orrible rubber "gator" thingy!?


    That is the only thing I have seen, but it might be that plastic joining
    section might just be the right size if you are lucky - my plastic pipe
    was a nice fit in my CI socket
    --
    Chris French
    chris French, Sep 26, 2005
    #2
  3. chris French wrote:
    > In message <>, Peter Hemmings
    > <> writes
    >
    >>
    >> <
    >> Plastic | |
    >> || ||
    >> _______| |
    >> toilet ( )_______ | ** < Cast Iron
    >> | |
    >> || ||
    >> | |
    >> | | < Cast Iron into garage floor
    >>
    >> What I intend to do is to replace the cast "T" and pipe to toilet with
    >> plastic and to fit a cross pipe connector (sorry don t know exact
    >> name) ready to drain shower/basin about one metre to the right of "**".
    >>
    >>
    >> Now the questions.
    >> 1. How easy is it to get the old "T" off without breaking the collar
    >> of the pipe going down the wall.

    >
    >
    > Probably not to difficult. I had to remove a lead soil pipe from a CI
    > socket when I redid a bathroom. Now that was probbaly bit easier as the
    > lead is very soft of course. But no matter. the joint was sealed with
    > something that appeared to be putty, might not have been, but if you
    > imagine 70 year old putty you get the idea It's wasn't that hard to chip
    > this out with an old screwdriver and a hammer.
    >
    > I'd probably start by using an angle grinder to remove most of the T,
    > then work down the sides with aforesaid screwdriver/hammer combo, till I
    > could remove the end of the T
    >


    OK thanks

    >>
    >> 2. What diameter pipe must I use from the basin/shower?
    >>

    > Basins normally 32mm, Shower 40mm
    >

    Do you know if these must be kept separate to stop the old "gurgling"
    effect in the basin when using the shower for instance?

    >> 3. I assume I can fit the new plastic junction and cut out the
    >> relevant holes later

    >
    >
    > I think so, but I've never done this yet.
    >

    OK
    >>
    >> 4. If I have to cut the old pipe (because I damaged it), is there a
    >> neat way of connecting plastic as the only way I have seen is an
    >> orrible rubber "gator" thingy!?

    >
    >
    > That is the only thing I have seen, but it might be that plastic joining
    > section might just be the right size if you are lucky - my plastic pipe
    > was a nice fit in my CI socket


    What did you seal it with?

    Thanks for the assurances!
    Peter Hemmings, Sep 26, 2005
    #3
  4. Peter Hemmings

    chris French Guest

    In message <>, Peter
    Hemmings <> writes
    >chris French wrote:
    >> In message <>, Peter Hemmings
    >><> writes
    >>
    >>>
    >>> What I intend to do is to replace the cast "T" and pipe to toilet
    >>>with plastic and to fit a cross pipe connector (sorry don t know
    >>>exact name) ready to drain shower/basin about one metre to the right
    >>>
    >>>

    >
    >>>
    >>> 2. What diameter pipe must I use from the basin/shower?
    >>>

    >> Basins normally 32mm, Shower 40mm
    >>

    >Do you know if these must be kept separate to stop the old "gurgling"
    >effect in the basin when using the shower for instance?
    >


    Well, this one of those 'depends' situations . Ideally I think it is
    best to keep them separate, so as to remove the risk of the problem.
    Though when I did the bathroom on my old house ISTR that the basin was
    connected to either the bath or shower waste pipe and I don't remember
    any gurgling, so I guess it depends on various things.

    i'd avoid combining them if I could though.

    >>> 4. If I have to cut the old pipe (because I damaged it), is there a
    >>>neat way of connecting plastic as the only way I have seen is an
    >>>orrible rubber "gator" thingy!?

    >> That is the only thing I have seen, but it might be that plastic
    >>joining section might just be the right size if you are lucky - my
    >>plastic pipe was a nice fit in my CI socket

    >
    >What did you seal it with?


    I used Cerafix 'Roof and Gutter sealant' - mostly because I had some and
    it seemed suitable for the job - the plastic was a nice fit into the CI
    so didn't need to fill a big gap.

    Like this I guess:

    <http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=100147&ts=81553&id=42717
    >


    The sealant is black, looks like it might be bitumen based, but I've no
    idea, doesn't seem to dry hard though - in fact didn't seem to dry
    really at all.. I'd have thought a general purpose silicone sealant
    would be fine though.
    --
    Chris French
    chris French, Sep 29, 2005
    #4
  5. chris French wrote:
    >snip



    >>>>
    >>>> 2. What diameter pipe must I use from the basin/shower?
    >>>>
    >>> Basins normally 32mm, Shower 40mm
    >>>

    >> Do you know if these must be kept separate to stop the old "gurgling"
    >> effect in the basin when using the shower for instance?
    >>

    >
    > Well, this one of those 'depends' situations . Ideally I think it is
    > best to keep them separate, so as to remove the risk of the problem.
    > Though when I did the bathroom on my old house ISTR that the basin was
    > connected to either the bath or shower waste pipe and I don't remember
    > any gurgling, so I guess it depends on various things.
    >
    > i'd avoid combining them if I could though.
    >

    OK TA

    >>>> 4. If I have to cut the old pipe (because I damaged it), is there a
    >>>> neat way of connecting plastic as the only way I have seen is an
    >>>> orrible rubber "gator" thingy!?
    >>>
    >>> That is the only thing I have seen, but it might be that plastic
    >>> joining section might just be the right size if you are lucky - my
    >>> plastic pipe was a nice fit in my CI socket

    >>
    >>
    >> What did you seal it with?

    >
    >
    > I used Cerafix 'Roof and Gutter sealant' - mostly because I had some and
    > it seemed suitable for the job - the plastic was a nice fit into the CI
    > so didn't need to fill a big gap.
    >
    > Like this I guess:
    >
    > <http://www.screwfix.com/app/sfd/cat/pro.jsp?cId=100147&ts=81553&id=42717
    > >

    >
    > The sealant is black, looks like it might be bitumen based, but I've no
    > idea, doesn't seem to dry hard though - in fact didn't seem to dry
    > really at all.. I'd have thought a general purpose silicone sealant
    > would be fine though.


    Thanks for the advice, I will having a go at it later next month.
    Peter Hemmings, Sep 29, 2005
    #5

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