New toilet - attic cistern - spurting

Xcellor

I've just had a new bathroom put in and I went with following toilet

GoodHome Cavally White Back to wall Toilet set with Soft close seat | DIY at B&Q

and the cistern (not the one supplied with toilet) was fitted in attic. Seems all fine when flushed and no problems but towards the end of flush there is like a spurt of water - not always but when it happens water will splash out of bowl.

I'm being told this is due to the rimless design but it seems more like the delivery of the water into the toilet is the problem. Looking for any suggestions?

Lenar3556

Is it designed for use with a cistern that high up? The flush will be entering the bowl at much higher pressure vs standard wall mounting and that may be the issue.

10-10-20

As Lenar said, the pressure from that height will make the flush-experience a little different than a close-coupled unit. Are you sure it's not a Japanese toilet with bidet function? 😁 They do exist and look just like yours.

https://www.bigbathroomshop.ie/milano-luxus-back-to-wall-japanese-bidet-toilet-78065

Do they offer a reducer for the downward flow because surely this has been an issue elsewhere other than just your bathroom?

Xcellor

https://www.boards.ie/discussion/comment/122732952#Comment_122732952

well the lads who installed it said they've done similar attic cisterns and not had this behaviour, I find it hard to believe changing the toilet will solve the problem. I would think there would be a valve could be fitted behind the toilet to slow the flow down

Lenar3556

Yes, possibly even some kind of restrictor within the pipe. It should be hopefully be realitively easy to resolve.

Xcellor

Just to give update.

I managed to get a diffuser that fit in the in pipe entry before the toilet bowl. Two pieces of plastic that can be adjusted to basically interrupt the flow / slow down flow speed. This has helped significantly… It's not something you can buy online from what i could see. A lot of rimless toilets going back to manufacturer due to this issue…

10-10-20

https://www.boards.ie/discussion/comment/122802075#Comment_122802075

As, so a 'diffuser' as opposed to a restrictor. I know them - it's like a helicoil which you twist to adjust. Perfect.

Lenar3556

https://www.boards.ie/discussion/comment/122802075#Comment_122802075

It’s likely the height of the cistern rather than ‘rimless’ that is the cause here.
Good that you got a working solution.

Xcellor

https://www.boards.ie/discussion/comment/122802202#Comment_122802202

Yes two bits of plastic - just took the edge of the water hitting the bowl first… The plumber was highly skeptical it would do anything but had to accept the results. In any case it saved changing the toilet which was a win !