Replacing zodiac valve inserts

[SiClapham]

Evening all
I'm looking to replace the valve inserts on my zodiac mk2 classic HD.
When the boat is at pressure you can hear the insert leaking......but when the over-cap (with rubber sealing ring) is screwed in, all is contained and hardly any pressure is lost. They are the inserts with the green tip.

Advice seems to be that it's a little awkard to hold them while unscrewing the insert, likewise when tightening the new ones

Any of you guys got some cool tips to make it easier

[Peter_C]

I replaced mine with brand new ones. Very easy to do. I think I just used a pair of needle nose pliers. You have to push the rubber part of the valve through with a narrow screwdriver or something not sharp.

With that said they still leak after replacement and the outer plug is the actual seal.

[donald463]

[QUOTE the outer plug is the actual seal.[/QUOTE]

That's what the handbook tells you on new models.