• Universal 3-in-1 Sizing: Fits 32 mm, 40 mm and 50 mm waste pipes using the included detachable adaptor-one valve covers all common sizes to simplify installations and reduce stock requirements.
• Dual Connection Compatibility: Designed for both push fit and solvent weld systems, making it ideal for mixed material setups without additional adapters or specialised connectors.
• Stops Odours and Trap Siphoning: Automatically admits air into the waste system to balance pressure and prevent trap seal loss-protecting rooms from unpleasant foul smells.
• Internal Use Only: Engineered for indoor installations above the flood level of connected fixtures-ideal for bathrooms, kitchens and utility areas where roof venting is impractical.
• Compact Serviceable Design: Smooth ABS construction with removable top cap for easy cleaning and maintenance; low-profile body suits tight spaces and discreet fitting.
• Easy Vertical Installation: Installs quickly on vertical waste pipe sections using standard fittings; no special tools required. Always fit above the highest connected trap water level for best performance.

The LavaTap 32/40/50 mm Universal Air Admittance Valve keeps waste systems balanced by allowing air in when negative pressure occurs, preventing trap siphoning and foul odours. Its 3-in-1 modular design fits 32 mm, 40 mm and 50 mm waste pipes using the included detachable adaptor, providing flexibility for plumbers and DIY users while cutting the need for multiple valve sizes. This valve is compatible with push-fit and solvent weld pipe systems and must be installed vertically for internal use only, above the highest connected trap water level. The durable ABS body includes a removable top for inspection and cleaning, ensuring long-lasting reliability and quiet operation. Ideal for bathrooms, kitchens and utility rooms, the LavaTap Air Admittance Valve offers a compact, professional-grade solution where external venting is impractical. Engineered to meet the functional principles of BS EN 12380 design standards.