soil pipes

brownieddie · 9 Apr 2005

I am about to install a down stairs toilet and sink. The soil pipe is just through the external wall but is metal.

1. What do i need to drill through the wall, is it hard?

2. How do i cut into the existing metal soil and connect my new waste?

3. Can my sink waste go into the soil stack?

All help will be appreciated.

Nick

kevplumb · 9 Apr 2005

1 i use a diamond core or you could stitch drill it

2 angle grinder make sure the stack is secure before cutting (saves headaches)

3 yes

ChrisR · 9 Apr 2005

It isn't quite as simple as that.
Hire the core drill and bit but not from HSS. £25 tops for both. Hire a small bit for the basin waste too.

Connecting to iron isn't trivial - there are special connectors, ask in your local proper plumbing supplier, eg ugly rubber things with jubilee clips. Many decide to replace the bottom bit of pipe with plastic because it's easier overall.

breezer · 9 Apr 2005

my 2 p worth

if using a core drill make sure the "cut out bit" doesnt fall into the soil pipe. changing the bottom to plastic sounds less hassle

ChrisR · 9 Apr 2005

Bejaypers the diamond core drill is for the wall, not the iron pipe!

I've failed (many times!) to get plastic waste to seal into iron stink pipes. All the boss things leak quite soon despite every goo I've tried.

kevplumb · 9 Apr 2005

drainage centre do a metal strap on boss chris expensive tho

brumylad · 9 Apr 2005

I would remove the cast iron 6" or so above ground level or even dig down to the clay / iron socket for a better job.

Put in an access branch for your new loo. It alows the drains to rodded easily (when roots or other nasties clog it up).

brownieddie · 14 Apr 2005

Thanks guys very helpfull

htgeng · 14 Apr 2005

brumylad said:
Put in an access branch for your new loo. It alows the drains to rodded easily (when roots or other nasties clog it up).

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and you want one of those gerberit ones too as they have a nice oval access port. your local 'drain center' will carry them.

diynot

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soil pipes

breezer

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