leak from new toilet waste pipe

[nicck]

The old toilet has been changed for a vanity unit.

There is a soil pipe adapter, very well fitted onto the old cast iron pipe which brings the diameter up to modern standards. This has a deep rubber connector aperture.

The soil pipe attaches about 2cm higher than the toilet outflow which makes it slightly uphill.

When fitted there was a slow leak from the standing water both at the connection to the toilet and at the connection to the adapter.

The toilet connection is unglazed, due to it being a vanity unit style.

I have been advised that upgrading the leaky Viva Slinky-Fit Flexible Pan Connector 200mm to a Macfit Flexible WC Connector Straight 160mm should prevent the leak at the toilet output as the Mac has a much tighter seal there. I am concerned about the connection to the soil pipe adapter.

It is unsuitable to raise the new toilet on a plinth.

Any technical advice?

 

[Lower]

An uphill drain is never a good idea. You'll be asking the flexible joint to permanently hold water, it will be more prone to sludging and blocking up.

if you don't want to raise the toilet then you need to consider changing the cast iron down pipe to give it a proper fall.

 

[just pumps]

Put the pan on a pllnth.

 

[Hugh Jaleak]

Any technical advice?

Yes, stop trying to ignore the laws of Gravity. You're asking water and waste to flow uphill, it wont. Only solution is to either raise the pan, (which you said cannot be done), or lower the soil pipe. Trying to bodge it up any other way, is just that, a bodge, and will only serve to cause you further problems down the line.

 

[lostinthelight]

Not an ideal situation having one hanging about in the breach waiting for another to come along and knock it out ..If its unsuitable to raise it on a plinth, toilet outlets heights are not standard so can you look for one that has a higher one?