Drilling a soil pipe?????

[lmhud]

Hi I am putting a macerator unit in for a downstairs toilet, I need to get into the soil pipe and wondered if it is possible to drill the cast pipe so I can put a boss stap on with a 32mm insert for the saniflo waste.
If the cast can be drilled, will ordinary drill bits do it, or what will I need.
Has anyone tried this??
Thanks

 

[kevplumb]

did one once a while ago ,you need to mark the hole out on the pipe then drill a row of holes in a circle then carfully cut out peice with chisel
Tryed a holesaw and lost the teeth apparently there is a hard skin on the outside of cast pipe .hope this helps

 

[lmhud]

Thanks Kev It has to be easier than renewing the soil stack.

 

[kevplumb]

afterthought watch were the bits you knock out go
mine had a ic close by so i could get them out

 

[ChrisR]

You cannot put any sort of strap boss successfully on a cast iron pipe. That's my opinion !
Easy to do with a DECENT holesaw(!) but every one I've ever tried, or looked at, leaks. Yes that IS with the whole affair gunged up with silicone. The strap bosses are designed for plastic pipes.

If someone knows different, I'd love to be wrong!!

There's a variety of special fitings to choose from - ask in a good merchant.

 

[kevplumb]

never used one but apparently plumbcentre do a bronze one for cast

must admit i tryed a plastic one and had to silicone it

holesaw was a starret not exactly cheap

 

[lmhud]

thanks all, will go to plumbcenter and see what they have.
will let you know the outcome

 

[lmhud]

Hi Since I posted the initial post I have had a spell in hospital so I am now back to this problem, I have been to plumb centre but they were no help, after spending about 45 minutes in there I came away with no answers at all.
Does antone have the name of a good plumbers merchant in the north-west that could possibly help me out.
I have all the pipe work in now it is just the little matter of the last 6 inches getting into the cast soil pipe.
Will check back tomorrow to see if anyone has been able to help.
Thanks Kenny.

 

[ChrisR]

There is a thing called a "Fixacon Strap", one of the "Timesaver Couplings" family it seems from the list I have. There are 1 1/4" and 1 1/2" versions. It obviously isn't a piddly plastic thing, its RRP is £63, shop price £43. Plus vat. Cor

 

[kevplumb]

sorry wrong slotted you try drainage centre
all one shop here