• Allows air to enter to break siphon, but does not permit air and odors to escape. Cap is threaded 1/2" NPT to accept a barb fitting if you wish to vent overboard.
• Overboard venting is required if PVL or HVL series is used in an exhaust system.
• HVL and PVL Series vented loops assure clog-free anti-siphon protection for sanitation or engine exhaust systems. The oversized vent valve can easily be removed for inspection or cleaning without tools. Mount Hardware is included.

Sanitation - Water Pressure - Pumps - Valves & Seacocks - Strainers - Fittings