New toilet pan not clearing

[Timski86]

Hi All,

I'm new to the forum and looking for a bit of help with a new toilet I'm fitting, I'm quite a proficient DIYer but I could use some expert advice with this problem!

I am replacing the toilet pan in my flat as when I had the bathroom done I had a wall mounted pan fitted but I was never very pleased with how the builder fixed it to the wall so I have now decided to fit a floor mounted one. The toilet backs onto a utility cupboard where the soil pipe is connected by a flexible connector to a more or less horizontal pipe which runs for about half a meter before going into the main down pipe.

The old toilet never had any issues with flushing and would almost always clear it in one go, the new one feels like it has a very strong flush but it seems to be struggling to push all the waste through, a couple of things I think might be the issue.

1 - The waste outlet of the toilet is lower than the old wall hung unit meaning its having a harder time pushing the waste through the soil pipe.

2 - The corrugated connector pipe is holding up the flow and should be replaced with proper solid pipework.

3 - There is an issue with the design of the toilet.

This is my first time dealing with anything related to soil pipework so any advice or input would be greatly appreciated!

Thanks,

Tim

 

[Timski86]

Yes, to see if the water from the WC is flowing past or backing up

It looks to me to be flowing nice and fast through there, no backing up but that's just with water, I'll see that happens next time I use it in anger

It sounds like the conclusion is bad pan, would you say its still worth replacing that ribbed pipe with solid just as a matter of good practice?

 

[Stu-B]

whats the pipe like outside? does it have a vent?

 

[Deleted member 32524]

Maybe the flush pipe is not at the correct angle causing the flow of water in to the pan to not flow where is should. I had it a couple of weeks ago, same set up as you, customer says toilet is really hard to get number 2s away. Went round noticed a pencil line on pipe pused it back into place and the water flow in bowl was now back to effectively pushing paper etc through. Would be much better to run soil pipe to behind toilet and get rid of flexi.

 

[Timski86]

whats the pipe like outside? does it have a vent?

It's an 18 story block of flats so I assume the pipe is well vented at the top, also the old toilet had no trouble.

Maybe the flush pipe is not at the correct angle causing the flow of water in to the pan to not flow where is should. I had it a couple of weeks ago, same set up as you, customer says toilet is really hard to get number 2s away. Went round noticed a pencil line on pipe pused it back into place and the water flow in bowl was now back to effectively pushing paper etc through. Would be much better to run soil pipe to behind toilet and get rid of flexi.

I didn't realise the flush pipe was so critical, I will do a better job of getting this horizontal tomorrow as I probably didn't do the best job.

I have bought solid pipe parts to push together to replace the flexi pipe so I'll try that tomorrow too, one question, with the way I think they will fit together I think I will need a short straight section which will only angle down slightly connecting to the pan first, is this a no no? Should it go straight into a downwards section?

Thanks again for all the help everyone, this is a really great community!

 

[Chuck]

Use a spirit-level to check that the pan has been installed level (front-to-back and side-to-side). Doesn't need to be far out for performance to be impaired.