Out with the old! I chucked the old syphon and hooked the new one on to the flush handle:
After the new syphon was in place, I wanted to change the ‘close coupling’ seal. From what I’d read, you change the ‘close coupling’ seal to prevent leaks between the cistern and the pan once they’re reintroduced. Well, not this time. The seal on this weird toilet is not at all like the standard one, which just looks like a thick rubber doughnut. The original was much thinner and also hexagon shaped to fit on the plastic nut. The loo wouldn’t go back together with the thicker new one shown here in place:
Here’s a comparison photo showing old and new. Annoyed, I reused the old seal – without problems, luckily.
Nearly finished now...