DV Diving only authorised service technicians for Intersprio aga Divator and OTS Guardian full face masks in Northern Ireland
At least once a year and more frequently if in heavy use. Every 6 years they will require a complete overhaul
The service includes disassembly, ultrasonic cleaning with approved fluids, and reassembly using the manufacturer's service kit components. Any worn or broken parts will also be replaced.
Once the mask is reassembled, all parts are function tested and the medium stage and cracking pressure are set per manufacturer's guidelines.
Its depends on which of regulator you use but roughly: