2Pack Pressure Relief Valves — Replacement for 3L / 5L / 8L Backpack Sprayers Key benefits Prevents dangerous overpressure: builtin Shoulder Safety Valve Mechanism prevents excessive pressure buildup during operation, reducing the risk of hose or tank failure. Keeps you working: automatic pressure release activates when a preset threshold is reached, maintaining safe operating conditions and avoiding interruptions from trapped gas or sudden pressure spikes. Durable, easy replacement: made from longlasting PP material with a rugged surface finish. Engineered threaded connection provides an easy, secure install for quick maintenance in the field. Compatible and versatile: designed specifically to fit 3L, 5L and 8L portable/backpack sprayers. Available in green, black, and blue options to match or original caps. What it does Pressure relief through an automatic valve action: when internal pressure exceeds the designed limit the valve opens to release excess pressure, then reseats to maintain normal operation. Threaded connection and robust finish ensure a solid fit and reliable sealing in standard backpack sprayer housings. Specifications Pack: 2 valves Fits: 3L, 5L, 8L portable/backpack sprayers Material: polypropylene (PP) Mechanism: Shoulder Safety Valve (automatic pressure release) Finish: rugged surface finish Color options: green, black, blue Typical use scenarios Garden spraying: a worn relief valve on a 3L or 5L sprayer to maintain safe pesticide or fertilizer application around beds and borders. Small farm and orchard work: use on 8L backpack sprayers to avoid overpressure when treating larger areas or moving between tasks. Greenhouse and nursery maintenance: keep constant, safe pressure for repeated applications without interrupting workflow. Notes for users Confirm thread compatibility with your sprayer before installation. Designed as a direct replacement for common 3L/5L/8L backpack sprayer models that accept threaded relief valves. Regular inspection of the valve and threads will help ensure continued safe performance.