Directional air release valves (DARVs) vent trapped air from pool piping, preventing air locks and restoring optimal water flow. - Benefits: Prevent air pockets and cavitation in pumps and filters, improving circulation and skimmer performance; reduce pump cycling and energy use; reliable, low-maintenance operation in pool systems. - Key specs: Durable PVC body with corrosion-resistant seals, suitable for chlorine and saltwater pools; connection sizes from 1/2" to 2" to fit most residential and commercial plumbing; compatible with standard unions and fittings; designed for main line or return line placement. - How it works: Automatically vents accumulated air through a vent cap and closes when water reaches the cap, maintaining continuous flow. - Use scenarios: - New pool installations with long pipe runs or multiple loops to prevent air locks. - Retrofit for commercial/public pools to boost circulation and reduce pump load. - After backwashing, winterization, or startup to purge air and normalize flow. - Care and installation: Install on primary circulation lines using appropriate unions or glue; inspect seals during routine maintenance and replace vent caps or O-rings if leakage occurs.