[combat1]

Hi All
I have an 11 litre resin vessel, last refill I only tightened the riser hand tight but now it’s locked solid.
Tried gentle taps with a rubber mallet and using mole grips for greater leaverage but locked solid.
Has anyone overcome this problem in the past? Any suggestions would be appreciated.
Thanks

[Smudger]

only do what your doing now - if you can strike the cap at a shallow angle between the in/outlets so the force takes it anti clockwise

Darran

[NWH]

I don’t know if it’s the top cap which is locked with what you’re talking about where the riser goes in to,if you take the fittings off either side you can slide a screwdriver through the top through both fittings twist and undo.

[combat1]

Thanks Guys,
Sorted, was a little too gentle with the tapping😂 couple of heavy bangs freed it off.
Thanks for your help.

[DaveG]

If you lube the ring with vaseline it makes it easier to come off 

[Arnold Palmer]

If you lube the ring with vaseline it makes it easier to come off 

Words to live by right there.

[֍Winp®oClean֍]

If you lube the ring with vaseline it makes it easier to come off 

Better to use silicone grease, vaseline is petroleum based ans can actually ruin rubber seals.
https://www.wolseley.co.uk/product/regin-silicone-grease-50g/