Specifications:

• Hydrostatic Relief valve installs inside main drain to relieve hydrostatic pressure when pool is emptied.
• Helps prevent swimming pool damage due to hydrostatic pressure beneath the pool shell when pool is drained.
• Materials: ABS Plastic
• Color: White
• Spring-loaded
• Leak proof
• Self-cleaning
• Non-corrosive
• 1.5-inch and 2-inch Port Sizes