Removing torbeck style valve from concealed cistern

[bsr]

Hello

This cistern is filling very slowly. I suspect dirt in the filter or washer. Any hints/tips on removing the valve, as access looks pretty tight?

Do these come apart half way up, or do I need to remove the whole valve from the inlet? There doesn't look to be enough space. Pic attached.

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Thanks

 

[PrenticeBoyofDerry]

The plastic nut on the top side of valve will unscrew, there is a pin and washer enclosed, if the washer is split or debris blocking. It can cause slow filling, replace or clean.