soil stack from cast iron to grey plastic .

[wigz]

hi just been to look at a job and a customer has a grey plastic soil stack, apart from a 1/12 metre length of cast iron soil coming from ground level meeting the plastic. the customer wants the cast iron taken out and replaced with grey plastic. if i cut the soil pipe at ground level what type of fitting could i use to go from old cast iron to plastic? can someone confirm the waste sizes thanks for the help

 

[WHPES]

Dig out the cast iron to the bottom and do the job properly. It will sit into a clay spigot (careful not to damage the spigot) Connecting in above ground can lead to problems.

 

[wigz]

will the cast not be fixed in any way the clay? . reason why i said i would go to ground level is to not dig up part of their drive and was unsure how far it would go down. how would you price up for this not knowing whats under there?

 

[GQuigley67]

WHPES is right I'm afraid you'll need to dig up the drive it should only go down a couple of 100mm not too deep

 

[wigz]

im not worried about digging it up, i didnt realise doing it the way i was going to do it would cause problems, thanks for that.

 

[GQuigley67]

you could use a 4" cast iron coupling with the standard rubber, but tbh it wouldn't look great

 

[wigz]

yeah i suggested that to her, but its a nice house and would look horrible and i wouldnt be happy fitting it, i think best option is to dig it out and make it all match. i wont need many fittings just a connector to connect to existing soil, any ideas on time it will take and a price. i obviously have my own idea just curious thanks

 

[unguided1]

City plumbing do a fitting and I cant remeber who makes it, Polypipe I think, any way it has the same connection as a pan connecter on one side which you push into the cast iron and the other end is a 110mm soil connecteor, I have used these to great succsess many times, just cut the cast iron flush with the ground grease up the fitting as it is tight and push into the cast iron then push yer 4" soil straight into it. it makes the whole job very neat

 

[wigz]

thats excatly what i was going to do, but i was advised if i did it that way it could bring up future problems .

 

[unguided1]

I cant see why there would be a problem with it and I have been using them for over ten years with no call backs if it is that much of a worry put an access spigot on top, then if there is a problem it can still be easily sorted.

 

[Guest123]

Use a cast iron to plastic timesaver coupling. It looks like a clamp with a rubber seal and bolts together with a socket wrench. Looks very neat. Use a angle grinder or hire snap cutters to cut it. You can also use Heritage pipe which looks like cast iron and has a rubber seal in its socket. On many properties in Glasgow and Edinburgh and in fact most highly populated cities, the first length coming out of the ground is always cast iron for strength as its less prone to breakage unlike plastic. Plastic is the second length up from the cast iron. Time saver is available from most major plumbers merchants.

 

[PlumbingSucks]

Try bes.co.uk part number 13016

 

[stevetheplumber]

also good idea to use an access pipe at the bottom as your working between two fixed points youll have to half socket it to get it in or use a slip coupling

 

[wigz]

thanks for the advice think i will dig it up and put plastic pipe to the clay underground, will fit a access fitting above ground at low level.