7305 Pool and Spa Check Valve Replacement 2 inch to 21/2 inch Product highlights Prevents backflow and system drain down so pumps and spa lines hold prime when equipment shuts off. Fits 2 inch to 21/2 inch connections and is compatible with pool pumps, heat pumps and spa systems. Handles flow rates up to 170 gallons per minute with minimal head loss for efficient water circulation. Durable CPVC and stainless steel construction with reliable sealing for long service life. Clear lid and red seal plate allow quick visual inspection without disassembly. Swing and spring hybrid design permits both and intake flow and can be taken apart easily to clear debris. Corrosion resistant superalloy spring suited for heater and chemical dispenser and salt generator installations to support stable operation. Why you need this check valve Stops water from flowing back down the pipe when pumps turn off, preventing pumps from slowly draining and avoiding loss of prime. Keeps spa water from draining into the pool when the pump stops, preserving spa water level and reducing maintenance. Low head loss design maintains efficient circulation, helping system components operate as intended. Key features and benefits Compatibility and size: Designed for 2 inch to 21/2 inch plumbing and common pool and spa equipment, simplifying replacement and upgrades. Performance: Supports up to 170 gallons per minute while minimizing pressure loss to maintain flow efficiency. Material quality: Tough CPVC body and stainless steel internal parts resist corrosion and provide strong sealing under typical pool and spa conditions. Serviceability: Clear lid, red seal plate, and easy disassembly make inspection and debris removal straightforward, reducing downtime. Reliable spring: Corrosion resistant superalloy spring provides consistent operation in heater lines and near chemical feeders or salt generators. Typical applications Install in front of a pool pump to prevent the pump from losing prime and from slowly draining after shutdown. Use in a spa bypass line to stop spa water from draining to pool level when the pool pump turns off. Fit into heater lines, chemical dispenser lines, or salt generator loops to maintain one way flow and steady equipment performance. What to expect A robust check valve that reduces unwanted backflow and helps maintain system water levels. Easy inspection and maintenance with components designed for quick access and debris clearing. Compatibility with common pool and spa equipment and plumbing sizes for a straightforward replacement. Model: 7305. Compatible with pool pumps, heat pumps and spa systems. Handles up to 170 gallons per minute.