Our sprinkler servicing contractor has advised that an annual inspection of 100% of sprinkler heads is not necessary.  The contractor is a well-known installer and servicing provider however their advice appears to conflict with the British Standard guidance BS9251, 7.1, e. which states: “The sprinklers and cover plates should be inspected to determine whether they have been tampered with or whether their spray pattern has been impeded” as part of the annual service.

Have other members implemented 100% checks of all sprinkler heads or are members accepting certificates that don’t detail 100% sprinkler head inspection?