I fit Fluidmaster valves in most instances because they are.....
On the rare occasions where these valves won't fit your toilet I do carry alternative valves on the van to cover most installations.
If I am replacing your syphon then I usually fit one of these. They have many advantages over the older style one piece syphon:
If I am replacing your drop valve then I usually fit one of these. These valves:
These are great for replacing existing traditional syphons whilst keeping a lever as a means to flush your toilet. However, unlike using a traditional flush handle these are much easier and lighter to operate.