Sturdy and Durable: The swimming pool parts for the piston valve are made of sturdy and durable plastic materials; the clamp can firmly connect the hose holder and the pool to prevent water leakage Efficient Maintenance: The shut-off valves can isolate parts of the pool system, making it easy to clean or replace parts without interrupting the operation of the entire pool. Wide Compatibility: Compatible with 1500, 2500 and 4000 gallons per hour salt water chlorinator and 2000 gallons/hour chlorinator pump Quick and Easy Installation: These pool control valves are designed for easy installation with above ground pools and accessories, reducing the time and effort required to integrate into your pool setup. Wide Application: Compatible with above ground pools, use with 1-1/2 inch diameter hoses and 2-1/2 inch threaded fittings, replacement parts for pool pumps swimming pool