Sprayer Pressure Release Valve Key benefits PP construction provides strong resistance to deformation for long service life and reliable use. Improves knapsack sprayer efficiency by delivering dependable pressure relief, helping save time during spraying tasks. Auto deflation feature releases excess air when pressure rises above the set value, helping protect the bottle body. Easy to install and remove, making it simple to old or damaged air release valves and maintain sprayer performance. Product features Material: Polypropylene (PP) for durability and shape retention Function: automatic pressure relief to prevent overpressurization Performance: dependable operation with longterm durability in garden and agricultural use Installation and compatibility Very easy to install and disassemble; designed to worn or damaged air release valves on standard garden sprayers Suitable for knapsack sprayer systems that require a reliable pressure relief valve Use scenarios Home and garden spraying: use with pesticides, herbicides, or liquid fertilizers in small to medium gardens and landscapes Greenhouses and nurseries: maintain consistent spray pressure for uniform coverage during plant care Replacement part: install to a worn or damaged air release valve, restoring safety and efficiency to an existing sprayer