Pressure Relief Valve
Protect your deep pond liner from hydrostatic pressure damage with the Pressure Relief Valve. Engineered for ponds with a minimum depth of five feet, this spring-loaded safety device automatically manages groundwater pressure to prevent liner bulging, shifting, and costly repairs.
How It Works
When groundwater levels rise, hydrostatic pressure builds beneath your liner. At 90 PSI, the spring-loaded valve automatically opens, allowing groundwater to safely enter your pond. Once pressure equalizes, the valve closes and the spring gasket re-seals—no manual intervention required.
Key Benefits:
- Prevents liner damage from hydrostatic pressure buildup
- Rated at 90 PSI for reliable pressure relief
- Automatic operation—opens and closes on its own
- Spring gasket re-seals system after pressure release
- Essential protection for ponds 5 feet deep or greater
- Threads into standard 2" bulkhead fitting (sold separately)
- Durable construction for long-term reliability
Trusted by professional pond installers and serious pond owners, the Pressure Relief Valve is an essential component for any deep pond system. Once installed, it operates completely automatically—no maintenance, no monitoring, just reliable protection.
Frequently Asked Questions
Q: What pond depth requires a pressure relief valve?
A: Pressure relief valves are recommended for ponds with a minimum depth of five feet, especially in areas with high water tables.
Q: What is hydrostatic pressure and why is it a problem?
A: Hydrostatic pressure is the force exerted by groundwater beneath your pond liner. When groundwater levels rise, this pressure can cause the liner to bulge, shift, or tear.
Q: Does the valve require a bulkhead fitting?
A: Yes, a 2" bulkhead fitting is required to install the pressure relief valve. The bulkhead fitting is sold separately.
Q: How does the valve know when to open and close?
A: The valve is spring-loaded and rated at 90 PSI. When hydrostatic pressure reaches this threshold, the valve opens. When pressure drops, the spring forces the valve closed and the gasket re-seals automatically.
Q: Will groundwater entering my pond affect water quality?
A: The valve only opens when significant hydrostatic pressure is present. The amount of groundwater entering is minimal and designed to equalize pressure, not flood your pond.
Q: Does the valve require maintenance?
A: The pressure relief valve is designed for automatic, maintenance-free operation. Once installed, it works continuously without requiring monitoring or adjustment.
Q: Where should the valve be installed in my pond?
A: The pressure relief valve should be installed at the deepest point of your pond where hydrostatic pressure is greatest. Consult with a pond professional for specific placement recommendations.