How can I replace the diaphragm on a Jetflow syphon?

I have a jetflow syphon and the diaphragm was in tatters. About £2.50 for 2 replacements on ebay. It looked impossible to take apart but, as it was no good anyway I decided to try. I ran the holder and rod under a hot tap for a few minutes and then put it over a suitably gapped vice. Holding it firmly with a bit of downward pressure, I gave it a sharpish tap with a small hammer and it came apart lovely.

Stephen A
June 2022

Many thanks Steve ! You have helped me out with the screwdriver tip.
My lav is flushing like an old pro again. Merry Christmas!

TeeJay
December 2014

I realise its a bit of a late answer but I've just experienced EXACTLY the same problem. Tried prising open the green housing to slip the pull rod through but it was impossible to do. The housing doesn't seem to just "slip" over the end of the rod. There seems more to it. Better to but a new, slimline syphon equivilent. Only good thing about the Jetflow syphon is how small it is.

Mark Ames
March 2012

Using a screwdriver make the hole on the housing slightly bigger to allow it to come over the retaining section on the stem. If you do it just enough, it will click back in place, but the spring will also hold it in place.
Then either cut out a shop bought diaphragm, or thick grade plastic liner. I have used the liner with no problem.

Steve Bridge
July 2010