Tosh

Hello all,
Having never touched a cast iron soil pipe can someone point me in the right direction of how to add another waste into the stack. What to cut it with what fittings etc. Have seen laods of add-ons for plastic, nice and easy to drill boss strap over the top new waste into new hole simple. But cast iron??

Many Thanks

Tosh

Confusios say: man who go to bed with itchy bum, wake up with smelly finger.

ajs heating

there is a number of ways people do it.
drill the cast stack with a bi-metal hole cutter. then add boss for cast iron.
or change a section of the cast stack to plastic. easy job.
or change the complete stack. pain in the a**e.

not a job i like alls way try to avoid. as cast iron is a pain to work with and can easerly go wrong and crack.


changing the subject do you come from that little village maylandsea ? as i know many people there.

Tosh

You're proving to be my personal advisor on this site AJ

Had a call from my brother tonight actually he's now looking at removing the entire stack and replacing with plastic I won't tell you what I called him.

Didn;t know about putting the plastic in with the cast though, I like the sound of that. Is it a case of just cutting out a section of cast and sliding in a the same size in plastic or are there special joining clamps/braces etc etc.
Forgive the ignorance I am still all very new to plumbing and still finding my feet. Doing small private jobs for friends and such until someone eventually hires me. Usual thing, must be experienced, can't get experience without a job la de da de da etc etc.

On the other note Yes I am from Maylandsea. You're about the only other person on the planet that know's this place is even here ha ha ha

Confusios say: man who go to bed with itchy bum, wake up with smelly finger.

NickH

Fitting a boss onto the cast is easy enough, you can get a bolt on iron fitting with a big rubber sealing washer. You have to drill the hole obviously so get a good holesaw and make sure you get the right size boss as there are different size cast iron pipes. If you need to put in a new section then yes you basically cut out a section and replace with plastic, you can make the joins with rubber repair couplings, basically slip on rubber collars with big jubilee type clips, make sure you get the right size. Ultimately you could replace the whole stack, not too bad a job if it doesn't serve too many fittings or goes higher than a "normal" house, you can cut it off at ground level and again use a rubber coupling to join to the plastic. The dodgiest bit is getting the old stack down, its heavy and its definately a two man, two ladder job.

ajs heating

You're proving to be my personal advisor on this site AJ

i start to charge night rate soon



not that simple if you ever cut a section out of cast stack.
double check the above section never drops.
i prefer to change the complete lot rather than a section.

if you cut a cast stack at say a few inch above ground then insert one of these

Toolstation > Construction > Black Soil & Vent 96056


then carry on in plastic.
or if only putting a section of plastic in you'll need one of these to join the top part of plastic to the original cast stack

Toolstation > Construction > Black Soil & Vent 98452 but in 110mm but they do look sh*t


i'm only local to you
done quite a bit of work their for a firm who build alot of homes their
Soverign homes.

Tosh

That's really cool thanks guys,
Got to be honest I didn;t know you could cut and Boss strap cast the same as plastic so will go for that as it sounds the easiest option.

All he wants to do is move all his waste pipes in the bathroom down a foot so they end up under the floor boards. His cast stack runs down the corner of his bathroom so is accessable. He'd prefer to get rid of the cast and put in plastic but as I'm doing the Fekkin work we'll go for the easiest option. Much appreciated.

Did like the link though AJ thanks. They seem to be cheaper than screwfix and have more choice for plumbing bits.

Confusios say: man who go to bed with itchy bum, wake up with smelly finger.