OMS Drysuit P-Valve  A20918001 The OMS P Valve fits to Drysuits and is a fantastic solution to what was a long-term issue at times during long duration dives. The OMS P-Valve has been developed from feedback provided from divers with many years of underwater experience. The patented P-Port system allows the diver to remove and replace the P-Valve so that it can be easily cleaned, or simply removed for dives where it is not required, with the unique ability to remove the Balance Valve & Replace with a Sealed Blanking Plug when not required. The unique bayonet mount stops the valve accidentally being removed when the diver manipulates the ?on-off knob? during the dive. Self-Servicing was a prerequisite at the design stage, this is easily done & Consumables are available.