"BillR" wrote in message
...
hays wrote:
Can a loo with an external overflow be converted to internal overflow

It would mean I could loose a long run of overflow pipe

Yes, replace with the Flowmater valve which has built-in overflow as most
valves do.
Around 13 quid. BTW it means changing the lever to the supplied
pushbutton.

Or with a bit of DIY, you could use a Fluidmaster flap valve and your normal
lever handle: a friend has one of these valves fitted on a high-level
cistern, with a bit of 15mm tube, partially flattened at one end, fixed to
the lever arm to extend it to where it connects to the chain that pulls up
the flap of the flap valve. He also has a bit of bend stainless steel wire
arranged as a hook for this extended lever arm to fall back on in its rest
position.

Actually almost any syphon-type flush valve will work as an internal
overflow, as when the water level in the cistern rises higher than the U
bend at the top of the valve it will flow down the flush pipe. Problem is
this level is higher than the inlet, overflow and handle holes in yer
average cistern.


Another way is to feed the overflow pipe to a valve made for the job and
then into the soil pipe.
In my opinion this looks messy and the valves don't seem to be able to
cope
with cisterns filled by mains pressure, but you only find this out when
you're on holiday and the toilet overflows :-(

I hope you mean into the flush pipe, not the soil pipe! As CodsWallop*
pointed out that's a bit smelly!

* :-)

--
John Stumbles
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