Whatever happened to those siphonic toilets?

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i remember as a kid several of mums friends had a toilet that when you hit the lever the bowl filled with water for a while then, whoosh, it all went away as a siphon started. The outlet was smaller than a standard bog too.. Don't seem to see them any more as I idly browse bathroom stockists.. Was there something particular that caused them to disappear?
 
They need a larger cistern than modern WCs (which don't flush well anyway)

Most people don't know how to fit or renew the valve, so they end up not flushing well

They were expensive - in my first house I got one and it cost more than the rest of the (budget) bathroom suite put together.

I think they're great.
 
I agree with JohnD

We had one and never any problems with it. Did use a bit more water but never needed a second flush as some modern ones do.
 
You needed one of these (bomb) or they would not work and a lot of people left them out.
 

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Hi, just come across the thread. We have one of these toilets and had the innards of the cistern replaced about a year ago. As suggested, the toilet now only flushes with half the force and, whilst adequate, really needs sorting. I am pretty sure all the components are there but the flush mechanism is desgned for too low water out. I wonder if there is a recommended replacement part. The toilet is made by armitage shanks. Thanks
 
Hi and thanks for coming back. We are just about to start renovating the house and was looking to change the bathroom suite. However, the existing toilet appears to be really good quality and we would be interested in fixing it if we could find the correct parts. A local plumber fitted the part shown below which can be set to 4l or 6l - I think this cistern needs 9L but not too sure?

Thanks again.

cyst1.jpg


and this is the toilet itself

toilet1.jpg
 
If you have one, either hang on to it, or sell it on eBay.

People like me, who've had one, think they're great.

There should be a special valve (which plumbers call a bomb) in the throat where the cistern and pan join. About half the size of a small coke bottle. It might be worn out. Spares are still available.
 
John D is right and luckily you can take the syphon out by pushing out that yellow pin - look down the tube in the cistern and you should see the bomb. If it's there then replace the syphon making sure there are no holes unplugged in the square part (6l. flush with hole open) put it back and adjust water level as high as you can without it running down the syphon. See what happens then.:notworthy:
 
you guys are talking about toilets like this one, right ? (Cause that one in the pics doesn't look like it would flush like this)


Ps, I was gobsmacked how many people have videoed a toilet flushing and putting it on YouTube.. The Internet really is a million monkeys reproducing Shakespeare
 
From my limited D-I-Y experience the 'bomb' itself can't really wear out as it is just a circular piece of plastic.
HOWEVER the rubber washer/grommet that seals the bomb to the toilet body will wear out and without the seal you will not have syphonic action.
I did source a complete bomb for one toilet only to find that it just needed the washer.
On my other toilet I just purchased a washer from 'Tool Station'.

andytw
 
I know next to nothing about them, but I understand you need a traditional syphon, not one of the modern quiet flushing valves. One of my relations had a flapper fitted, and the syphonic WC never worked properly again. It should suck the pan and trap empty first, then perform the wash-down and refill (perhaps they are others that work differently)
 
You're right John - the syphon fitted is OK and easy to replace the diaphragm - awaiting report from O.P:notworthy: The wash down is constant with the flush if you're a pedant like me;) pretty much all the same principal with a vacuum between 2 traps - even ones from the 1930's with a lead trap on the floor.
 
That American bog is like the Enola Gay - the bomb's long gone:notworthy:
 

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