-
Hi all and welcome to TheWoodHaven2 brought into the 21st Century, kicking and screaming! We all have Alasdair to thank for the vast bulk of the heavy lifting to get us here, no more so than me because he's taken away a huge burden of responsibility from my shoulders and brought us to this new shiny home, with all your previous content (hopefully) still intact! Please peruse and feed back. There is still plenty to do, like changing the colour scheme, adding the banner graphic, tweaking the odd setting here and there so I have added a new thread in the 'Technical Issues, Bugs and Feature Requests' forum for you to add any issues you find, any missing settings or just anything you'd like to see added/removed from the feature set that Xenforo offers. We will get to everything over the coming weeks so please be patient, but add anything at all to the thread I mention above and we promise to get to them over the next few days/weeks/months. In the meantime, please enjoy!
Fitting a back-to-wall WC with an offset fitting.
- Thread starter RogerS
- Start date
Distinterior
Seedling
- Joined
- Oct 1, 2025
- Messages
- 44
- Reaction score
- 38
- Name
- Tim
- LOCATION
- Colchester
Yes, I've had to do this a number of times....I'm assuming you mean a difference in the height of the outlet of the pan, compared with the height of the 100mm waste pipe connection?
If so, you can buy offset pan connectors with various degrees of offset & angles.
McAlpine offer one of the widest ranges and I personally think they are still one of the best quality available.
If so, you can buy offset pan connectors with various degrees of offset & angles.
McAlpine offer one of the widest ranges and I personally think they are still one of the best quality available.
Last edited:
Thank you both for the suggestions. I have two problems. First the existing soil pipe connection is slightly higher than normal and also slopes …luckily in the right direction. Pretty sure that has been resolved by shortening the length so that the point of ‘contact’ with the pan is now the right height.
The second is intractable and is the cold feed for the cistern’s proximity to the soil pipe connection. This pipe is not possible to shift without rebuilding the house as there is no easy or simple access to the other side to reroute it. The ‘fix’ is to use an offset connector (current plan albeit not going well) but rotated 90 degrees to shift the pan enough to the left of the soil pipe connection so as to miss the cold feed.
Trouble is getting the pan to connect ‘blind’. Bit like the children’s game….Pinning the tail on the donkey…only this time I feel like the ass.
The second is intractable and is the cold feed for the cistern’s proximity to the soil pipe connection. This pipe is not possible to shift without rebuilding the house as there is no easy or simple access to the other side to reroute it. The ‘fix’ is to use an offset connector (current plan albeit not going well) but rotated 90 degrees to shift the pan enough to the left of the soil pipe connection so as to miss the cold feed.
Trouble is getting the pan to connect ‘blind’. Bit like the children’s game….Pinning the tail on the donkey…only this time I feel like the ass.
Are flexible expandable soil pipes of no use?
Distinterior
Seedling
- Joined
- Oct 1, 2025
- Messages
- 44
- Reaction score
- 38
- Name
- Tim
- LOCATION
- Colchester
I have always avoided them like the plague.....
Lons
Old Oak
+1
Me too. A potential for future issues, corrugated pipe doesn't fare well with soit waste despite what the manufacturers would have you believe. I've witnessed one that had been in 12 months and it wasn't a pretty sight.
Lons
Old Oak
'Photos Rog?
Surely all those corrugations fill up overtime ? Ending up with a smooth bore?+1
Me too. A potential for future issues, corrugated pipe doesn't fare well with soit waste despite what the manufacturers would have you believe. I've witnessed one that had been in 12 months and it wasn't a pretty sight.
Lons
Old Oak
Fill up - yes. Smooth - no 
Doug
Old Oak
To be honest Roger as long as it’s an upstairs bathroom & from looking at your photos in your position I’d opt for a brand named concertina one, they work fine & will give less of an abrupt restriction than the offset connector in your photo.
The advantage being you can connect the toilet up & check the connections for water tightness prior to finally pushing the toilet against the wall, also be aware they come in different lengths.
I’m not a huge fan of the concertina type connectors but have never known one fail due to normal use & can as in your case be a god send.
The advantage being you can connect the toilet up & check the connections for water tightness prior to finally pushing the toilet against the wall, also be aware they come in different lengths.
I’m not a huge fan of the concertina type connectors but have never known one fail due to normal use & can as in your case be a god send.
Lons
Old Oak
Having seen the 'photos Roger I'd agree that to be the simplest solution as it would be a very short run.
Had that been in my house I'd have done one of three things:
1). Stick in a false wall in front of the cold feed just to the height of the cistern top which means you can put the pan where you like. You would lose maybe 50 to 70 mm space as you bring it forward but that's not much unless it's very tight and what I did in one of our downstairs toilets as the outlet was in the floor to suit the original double syphon WC so too far forward)
2). Cut the waste outlet pipe close to the wall to give more room for one of the offset connectors available, or a short flexi.
3). Cut out the wall around the cold feed and re route it which might not be the easiest but far better aesthetically
I'm sure it wouldn't be likely in your case Roger but I've remembered something else I came across. It was a run of around a foot or so from memory of a concertina pipe, properly supported and luckily ran under the bath next to the WC. The customer had seen a leak and thought it was from the bath waste but it wasn't and a rat had climbed up the drain (upstairs bathroom) and chewed though the thin plastic wall so a bad leak every time the bog was flushed.
No sign of the rat apart from droppings so we knew the culprit.
I had to replace with another concertina but was able to fit a vermin control flap in the manhole to prevent further entry as the lady of the house became a bit paranoid.
Had that been in my house I'd have done one of three things:
1). Stick in a false wall in front of the cold feed just to the height of the cistern top which means you can put the pan where you like. You would lose maybe 50 to 70 mm space as you bring it forward but that's not much unless it's very tight and what I did in one of our downstairs toilets as the outlet was in the floor to suit the original double syphon WC so too far forward)
2). Cut the waste outlet pipe close to the wall to give more room for one of the offset connectors available, or a short flexi.
3). Cut out the wall around the cold feed and re route it which might not be the easiest but far better aesthetically
I'm sure it wouldn't be likely in your case Roger but I've remembered something else I came across. It was a run of around a foot or so from memory of a concertina pipe, properly supported and luckily ran under the bath next to the WC. The customer had seen a leak and thought it was from the bath waste but it wasn't and a rat had climbed up the drain (upstairs bathroom) and chewed though the thin plastic wall so a bad leak every time the bog was flushed.
No sign of the rat apart from droppings so we knew the culprit.I had to replace with another concertina but was able to fit a vermin control flap in the manhole to prevent further entry as the lady of the house became a bit paranoid.
Last edited:
Doug
Old Oak
I’ve been to a couple of jobs in bungalows where Roland has nibbled through the pan connector, the last one the lady said she’d got an awful smell in the bathroom, on taking out some boxing it was obvious to me a rat had chewed through the top of the connector.
The customer just wouldn’t accept this at all so as it was too late in the day to change the pipework & she had another toilet she could use I suggested I foam fill the hole to stop the smells & pop back in the morning to make repairs.
When I arrived in the morning unsurprisingly this is what I found
I’d completely filled the whole of the connector with foam but Roland had been busy & much to the customers horror & disbelief she had to accept the fact there were indeed rats in the drains around her property.
The customer just wouldn’t accept this at all so as it was too late in the day to change the pipework & she had another toilet she could use I suggested I foam fill the hole to stop the smells & pop back in the morning to make repairs.
When I arrived in the morning unsurprisingly this is what I found
I’d completely filled the whole of the connector with foam but Roland had been busy & much to the customers horror & disbelief she had to accept the fact there were indeed rats in the drains around her property.
Lons
Old Oak
Unfortunately people just don't realise or refuse to accept that there are rats in every sewer system and exactly what is is they live on.
Options 1 and 3 are in the Hell will freeze over first category.Having seen the 'photos Roger I'd agree that to be the simplest solution as it would be a very short run.
Had that been in my house I'd have done one of three things:
1). Stick in a false wall in front of the cold feed just to the height of the cistern top which means you can put the pan where you like. You would lose maybe 50 to 70 mm space as you bring it forward but that's not much unless it's very tight and what I did in one of our downstairs toilets as the outlet was in the floor to suit the original double syphon WC so too far forward)
2). Cut the waste outlet pipe close to the wall to give more room for one of the offset connectors available, or a short flexi.
3). Cut out the wall around the cold feed and re route it which might not be the easiest but far better aesthetically
I'm sure it wouldn't be likely in your case Roger but I've remembered something else I came across. It was a run of around a foot or so from memory of a concertina pipe, properly supported and luckily ran under the bath next to the WC. The customer had seen a leak and thought it was from the bath waste but it wasn't and a rat had climbed up the drain (upstairs bathroom) and chewed though the thin plastic wall so a bad leak every time the bog was flushed.
I had to replace with another concertina but was able to fit a vermin control flap in the manhole to prevent further entry as the lady of the house became a bit paranoid.
The corrugated extender option is a no-go as there is no length available between pan and wall to bend it into an offset.
So I very carefully fitted the offset into the wall pipe. Lined the pan up very carefully. Factored in the slight slope in the floor which is another story. Used the endoscope that Amazon delivered today and pushed the pan to the wall. So far it’s watertight but chickens still need to be hatched