Attwood Marine 90 P-Trap Vent The P-traps have been tested and certified by a third party lab to meet the ABYC weathertight and watertight requirements and ensure no liquid water will reach a fuel vent line, carbon canister or fuel tank. The 167016711674 P-traps allow air to vent freely during normal sea conditions and washdowns and meet the ISO 10088 requirement for minimum venting area. For 58 I.D. hose. Meets ABYC Standard. Cover can be removed for vent inspection, debris removal and fuel sys