Toilet overflow mechanism

[AndyDavis]

I've got an old-fashioned box type cistern that has a separate outlet for the overflow pipe. I've like to get rid of the external overflow pipe. A friend mentioned that you can get an "internal overflow" where the overflow just goes out into the toilet bowl.

Anybody know what its called and where I can get one? Can I fit it into my cistern and what should I do about the separate overflow pipe hole?

 

[Al-Glasgow]

syphons act as overflows, check the spillover level.

a lot of the more modern push button syphons have an overflow pipe built in.

can you post a pic of your syphon ?.

 

[AndyDavis]

Pic attached. Mines one of the old fashioned ones but I don't think the syphon acts as an overflow. Can I still fit a new inside with an internal overflow?

View media item 33445

 

[dcds4]

you need to take the lid off the cistern and take a photo of what you see in there...

 

[Al-Glasgow]

Andy,

I meant a picture showing inside of cistern he he he...

Yes, you can replace a traditional country pattern syphon with a push button style if it suits your cistern, checking hole size in cistern, usually 1.5 or 2 inch.

Also check the push button will fit thru the cistern hole.

If its a close coupled WC, then youre looking at replacing the fishplate/donut between pan/cistern.

Good luck.

 

[barkie1]

That pan looks like it's a siphonic trap I think?

 

[AndyDavis]

Oops, I'm blaming the Easter Bunny!

Pics below, the overflow is on the left hand side. I'd like to replace just the inside and keep the lever handle. Or is that asking for too much?

View media item 33447 View media item 33446

 

[bookahandyman]

you can buy a blank off for overflow and a new syphon flusher probably a 9 inch high one. keep the lever. just ensure the syphon has internal overflow on it and it will go into toilet if overflow occurs.

 

[Al-Glasgow]

If you measure up from inside base of cistern, maybe you'll get 10".

If 10" then you could get a 9" syphon to act as internal over flow.

If you push down on the fluidmaster float to make it overflow, look and see if water goes over syphon or down overflow pipe.

Does that make any sense to you ?.

Al

 

[AndyDavis]

Yep, tried it out, the overflow goes down the overflow pipe.

 

[Al-Glasgow]

So, if you block the overflow, does the water go over the syphon.

Or does it leak thru the notch at the back of the cistern ?.

Al