On Wed, 19 May 2021 10:13:18 +0100, John Rumm
wrote:

On 19/05/2021 08:26, MM wrote:
The cistern is fitted with the Fluidmaster bottom entry fill valve,
but Screwfix doesn't stock this currently. They do however stock the
Flomasta bottom entry fill valve. The two products look
interchangeable, but can someone please reassure me that the Flomasta
should be okay?

As a general rule they are interchangeable. It can be worth checking
that the threaded bit which fits the tap connector is similar in length
so that it will still mate ok with any rigid pipework.

The Flomasta has a shorter threaded bit! So I couldn't use it. Anyway,
turned out that I just needed a new fibre washer. I'll keep the
Flomasta for when I do the downstairs toilet cistern. Now I know what
to expect, I'll get the right bits in first. Downstairs it's not
leaking right now, but I want to replace the flush valve at some point
with a cable operated one.

MM