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Old 18th January 2014, 02:15 PM
paul4be paul4be is offline
Why do I bother????????
Join Date: Feb 2011
Member of: Darlington RA
Location: Richmond, North Yorkshire
Posts: 1,201

Yes as above they can be retested as per a metal cylinder. They do have a limited shelf life. Some are a total of 15 years use, however there are C/F bottles now with a much longer life that 15 years.
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