Air Release Valves

Our range of polypropylene (PPH) air release valves is designed to safely and efficiently remove trapped air from pressurised pipework systems, helping to maintain consistent flow, protect system components and improve overall performance. Commonly used in chemical processing and industrial fluid handling, these valves are an essential component in polypropylene pipeline installations where reliability and chemical resistance are critical.

Manufactured from high-quality polypropylene, these air release valves offer excellent resistance to a wide range of aggressive chemicals, along with strong abrasion resistance and long-term durability. The smooth internal surfaces reduce the risk of build-up and blockages, ensuring dependable operation even in demanding environments.

Pipestock offers one of the most comprehensive selections of PPH air release valves, with multiple connection types and seal materials to suit different system requirements:

• Plain metric air release valves for socket fusion pipework
• BSP threaded air release valves for easy integration into threaded systems
• EPDM seal options for general chemical compatibility and water-based media
• FPM (Viton) seal options for enhanced resistance to fuels, solvents and higher-temperature chemicals

This flexibility makes our polypropylene air release valves suitable for both new installations and system upgrades.

Our PPH air release valves are available in a wide range of sizes to suit different pipeline diameters:

• Plain metric sizes: 20mm to 110mm
• BSP threaded sizes: 1/2" to 3"

All valves are manufactured in a beige-grey finish, consistent with polypropylene pressure systems, and are available with either plain metric or BSP threaded connections to suit your installation method.

Trapped air within a pipe system can lead to reduced flow efficiency, pressure fluctuations and unnecessary stress on pumps and fittings. Polypropylene air release valves automatically vent accumulated air, helping to:

• Maintain stable flow and pressure
• Reduce noise, vibration and energy loss
• Protect pumps and downstream equipment
• Improve system efficiency and service life

Thanks to polypropylene’s excellent chemical and abrasion resistance, these valves are particularly well suited to harsh industrial environments.

PPH air release valves are widely used across a range of industries, including:

• Chemical processing and transfer systems
• Industrial waste and effluent treatment
• Pharmaceutical and laboratory installations
• Water treatment and process water systems
• Acid and alkali conveyance
• High-temperature or corrosive fluid handling

Whether you require a plain EPDM valve, plain FPM valve, BSP threaded EPDM valve, or BSP threaded FPM valve, Pipestock provides reliable solutions backed by technical expertise.