[j timms]

can anyone tell me how to remove old membrane from housing as i cant seem to do it?

[dannymack]

Not sure if its the same sort of casing I use but I've got a plastic type spanner to undo end cap !!!

[CleanClear]

There should be a large white circlip which you need to remove first. Once thats removed the centre cap (usually black) can be difficult to pull out. Its just a tight fit, you need to get molegrips on the fins of it taking care not to break them, turn it and pull slighltly at the same time.

[richard jagger]

Here you go Mate

I would go with this guy mark he knows his stuff.
http://www.youtube.com/watch?v=ska_S8IV7Q0

[lozsing]

clean it all out with a bleach solution before fitting new membrane

[David D]

Is bleaching something you should do every time you change the membrane?

[richard jagger]

Bleach all the plastic fittings,YES I WOULD.NOT THE THICK STUFF, BLEACH THAT IS.