Plumbing in a new toilet to old pipe

[gsport george]

It is time to tackle the bathroom. Unfortunately the original sink is very broken and no other original features survive so we are gutting it and using simple modern stuff.

The bathroom is on the first floor and the room below has a suspended ceiling which houses a lot of the plumbing.
The thing that confusses me is that the "new" 70's toilet has been plonked down on top of the old cast-iron waste pipe in the same location, but we want to move this back against the wall slightly. This means extending the slightly-downward-sloping-but-substantially-horizontal cast-iron main waste pipe.

I know you can get fittings to adapt modern pvc (shudder) to cast iron on the oputside of the building in a vertical run, but will these be reliable in an almost horizontal mode with a "leak" being a horrendous thought?

Any other options?

The horizontal section is a good 5 feet long and passes through the wall of the house, so removing it would be a pig.

 

[middi]

There is no reason whatsoeaver why this modification should leak, considering the array of adaptors and sealants available on the market nowdays.

Takle it with confidence and have faith.

There is nothing else you can do really, unless you want to move the toilet to the bottom of the garden. :wink: