We've just bought a new (to us) house and I am looking to replace the original toilet with a concealed dual flush toilet.
Proposed toilet: Caroma Opal 987073W supplied with uni-orbital connector (http://www.caroma.com.au/bathrooms/toil ... ilet-suite)
Bathroom: First floor, concrete slab (house built in 1942)
Waste Pipe: Cast iron pipe with external diameter of 146mm (internal diameter unknown)
Photo of existing connection (let me know if the link doesn't work): https://plus.google.com/photos/11156859 ... 0179998498
Setout: 188mm (max setout 220mm with supplied uni-orbital connector)
Existing connection: S-trap
The uni-orbital connector is supposed to be pushed into a 100mm (internal diameter) PVC pipe that is flush with the floor.
My question is whether it is possible to connect this Caroma toilet to the existing cast iron pipe?
What I propose is to cut the cast iron pipe flush with the floor (using an angle grinder), protect the cast iron with some sort of rust protection, measure the internal diameter and buy the right size pipe gasket (this general type of product https://www.fernco.com/plumbing/donuts- ... pe-gaskets) or a compression seal and then push the uni-orbital connector into the pipe gasket / compression seal.
Does this sound like the right way to do it or can you think of a better way of doing it? Is it going to work with a gasket given that the uni-orbital connector also uses a type of gasket so you effectively have 2 gaskets against each other (does that provide a sufficiently good seal or is it better to use a compression seal)?