Replacement UML water sensing cartridge for all Burke automatic PFDs.
An annual inspection of your Inflatable PFD should begin 12 months from date of purchase. Instructions for self-inspection can be found here - Instructions for Annual Self Inspection.
You should also check with your local Maritime Authority and / or sailing club for current requirements.
We also recommend servicing by a Burke accredited service agent. Your nearest certified Service Agent can be found here by entering your suburb and checking the PFD Service Agent box: http://burke-marine.myshopify.com/apps/store-locator