Water tank lock

[Demelza83]

Hi all
New to posting on club 80-90 though archives well used all ready thanks
Bit of a dull question comparatively but I ve trawled search engines and can't seem to find definitive answer.My T25 is a 1983 W.C Diamond RV conversion RHD - bought her in May - so far a massive learning curve...anyways I m getting round to all the jobs ready for summer of camping - decided I'd tackle cleaning water tank only to find out I don't have a key for it...doh. Are the caps generic? I can only find info about Westys-and do I just unscrew to remove & replace?
Advice greatly appreciated thank you.

[bigherb]

Usually a generic type
Look at the CAK tanks catalog to see if one is the same as yours.

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