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Old 4th June 2010, 08:45 AM
Enoch Enoch is offline
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Join Date: Nov 2009
Location: Near Boston, Lincolnshire
Posts: 788
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Hi there, if you undo the lid you will see that there is a chain attached to teh lid at one end. At the other end is a sprung metal piece that gets lodged across the tank opening.
Regards,
Enoch
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