Twyfords Donut

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Hi - my Twyfords toilet of some 20 years vintage needed a new siphon as it would not flush. So, guess what I was doing on bank holiday Monday? When I fitted the siphon I noticed that the 'donut' washer was in quite a bad way. Well, I didn't have a spare so chanced reassembling and trying the thing anyway. Sure enough when I flushed the cistern water was pouring out. Ah well a visit to the plumbers merchants the next morning should sort it.

I took the plastic elbow in to help identify the part and the chap sold me a close coupling kit which included the metal bracket as well as a new donut. I noticed that the new donut was a large rubber affair whereas the original seemed to be some sort of foam.

The cistern was duly assembled and sure enough it worked perfectly. However, the new donut is so thick that the tank no longer rests on the back of the pan as it is designed to. Rather it hovers about 2mm above, thus all its weight must now be on the plastic elbow (it is fixed to the wall but the screws are not carrying any load). Is this OK or should I be finding a different donut before the plastic gives way?

Any advice much appreciated.
 
you can get foam donuts as well - but theyre not as tasty as the dough variety.

plumb centre stock a few types i have always got them on the van alongside close coupling kits.
 
The actual weight of the cistern is on the doughnut not the bottom of the plastic siphon, which is why you now have a small gap, the plate is pulling it down, make sure tight and it will be ok, little tip if when you remove old cisterns and do not have new doughnut, before you remove old doughnut, remember which way it is sitting and replace the same way after new siphon replaced that way its deformed shape will fit the pan same as before it was removed

eating-14.gif


imho
 
Thanks for the replies chaps.

Still a little confused about what is now carrying the weight of the tank. I appreciate that it is not resting on the bottom of the siphon but as it is on the donut that in turn must be resting on the plastic elbow which sits below it. But if thats OK I'll just leave well alone. Good tip about removing the donut although I think mine was well past it (like lots of other things) 😉

Ta again.
 
plastic elbow - now im confused.....

i thought you said it was a closed coupled set you used - in that case it would be sitting on the pan would it not?
 
maybe it is a siphonicd w/c and the 'plastic elbow'refered to is the spreader/aspirator


imho
 
Hi q-plumb

Sorry, I have no doubt it's just my terminology. I have always understood that this design was called close coupled because there is no gap between the pan and the cistern. However the cistern does not feed directly into the pan rather it uses a plastic elbow that is clamped to the tank with the donut inbetween. I have heard this referred to as the 'accelerator' but am willing to bet that puddle has identified it correctly as the spreader (as this is exactly what it does).

I'm beggining to think now that the kit I have is meant for sitting directly on the pan. What do you think?
 
correct!!!!!

sure its not a low level type flush cone or have i skipped too much info?.
 
Hi Redsaw34

Do you mean that my assesment that I have the wrong kit is correct?

I'm obviosly not describing this wc very well so I'll have another go. The cistern sits on a raised ledge on the rear of the pan. The siphon delivers water into a plastic elbow shaped piece of plastic which feeds into a hole in the rear of the pan. The donut washer is clamped between this piece of plastic and the bottom of the tank. There is another smaller foam seal where the plastic enters the pan. On the end of the piece of plastic is a nozzle that splits the water into three streams - left, right and straight down. The plastic tube is in two parts that slide together.

I don't think I can add much more. If somebody can tell me what these parts are called by the professionals (printable🙂) it will make life so much easier when buying spares.

Thanks again for everybodys help.

Steve
 
Well I think you w/c is alot older than twenty years, maybe from the late seventies, when close couples w/c's started to hit the mass market,twyfords used a standard low/high level pan and clamped a plastic elbow on back, which cistern sat on,to cut costs ,this seems to be what you have,
some cisterns sat on the pan and others used the bottom cistern wall brackets,if your new doughnut lifts cistern from supporting pan and put all weight on plastic elbow, this should be corrected to be on safe side, as if you break plastic elbow, it will be a new w/c as parts no longer available I believe,
As said you could get 'L' shaped cistern supports that you drill into wall to support, or remove cistern and cut few mill off top of new thick rubber doughnut to allow cistern to sit correctly, or as said you can still get foam doughnuts, replace with one of these ,so cistern sits on pan, as was


imho
 
Thanks Puddle that's clear then I need to get the correct parts. Thanks for all your help, it is much appreciated.

Just for information these toilets must have been available much later than you think. I have three of these in my house the newest one fitted in 1994 when we added an extension.

Cheers

Steve
 
p4230032v.jpg


Here you go.

I have now obtained a foam donut from another merchants. The cistern now sits correctly on the pan and there are no leaks.

Thanks to all 🙂

Steve
 
Thesub said:
Here you go.

I have now obtained a foam donut from another merchants. The cistern now sits correctly on the pan and there are no leaks.

Thanks to all 🙂

Steve
Click to expand...

nice one Steve 😀

did not know they were still selling them into the mid nineties !!

imho
 
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prefer the jam variety🙂🙂🙂 foam gets stuck in my teeth🙂🙂🙂
 
Im not 100% sure but i suspect that this could possibly be a Twyford nocturn pan and cistern H.James in Romford road Manor Park London E 12 is very good for older spares .You could try Twyfords website be lucky regards turnpin
 
Have you tested the overflow for leaks.

pour water down the plastic tube on right side of cistern.
 
turnpin said:
Im not 100% sure but i suspect that this could possibly be a Twyford nocturn pan and cistern H.James in Romford road Manor Park London E 12 is very good for older spares .You could try Twyfords website be lucky regards turnpin
Click to expand...

Thanks Turnpin - Yes, I found this supplier on the web when we needed a new seat. Quite difficult to get one in Almond now. They're not cheap though!!

Steve

Alanc said:
Have you tested the overflow for leaks.

pour water down the plastic tube on right side of cistern.
Click to expand...

Hi Alanc - Thanks for the tip. No, No leaks from the overflow.

Steve
 
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