MagnaClean Professional System Filter - can't remove the lid

[talktalk]

We had a new MagnaClean Professional system filter fitted (the one with the red body and black plastic ribbed lid) a few months ago and I would like to check/clean the magnet for sludge.

However, I have tried using the plastic lid spanner (anti-clockwise) to loosen the lid but it won't budge. I can feel the canister twisting on the two valves so am reluctant to use too much force.

Has anyone any tips on removing the lid?

 

[ShaunCorbs]

Turn the valves off and open the air bleed screw should turn ok with spanner now

 

[townfanjon]

It will come off , it sounds like its been overtightened, just hold the body of the filter when you try release the top, I never use the supplied spanner to tighten them , just go with a strong "hand tight"

 

[Riley]

Have used large stilsons before