Hayward
Hayward Hydrostatic Relief Valve SP1056 – 1-1/2" / 2" MPT
Hayward Hydrostatic Relief Valve
Spring-loaded hydrostatic relief valve designed to release groundwater pressure beneath compatible inground pools and main drain assemblies.
Warranty Information
1-Year Manufacturer Warranty
Ultimate Pools is your first point of contact for compatibility verification, installation guidance, and warranty support.
The Hayward Hydrostatic Relief Valve (SP1056) is designed for compatible inground pool main drains to help relieve groundwater pressure that can build up beneath the pool shell. By allowing excess pressure to release through the main drain system, the valve helps reduce the risk of hydrostatic lift that can contribute to cracking, bulging or lifting of the pool structure.
Constructed from durable ABS plastic, the SP1056 uses a spring-loaded mechanism and self-cleaning O-ring seal. It is specified with 1-1/2-inch and 2-inch MPT threading for compatible main drain housings and is suitable for concrete, vinyl and fiberglass pool applications.
Key Features
Designed to release hydrostatic pressure that can build beneath an inground pool shell.
Uses a spring-loaded mechanism to respond when groundwater pressure builds beneath the pool.
Helps reduce the risk of sticking or leaking while maintaining proper sealing.
Designed for compatible main drain housings using the specified male pipe thread connection.
Made from durable ABS plastic for use in compatible pool main drain applications.
Suitable for compatible concrete, vinyl and fiberglass inground pool installations.
Compatibility & Fitment
Designed for use with:
- Compatible Hayward main drain sumps that accommodate the SP1056 hydrostatic relief valve
- Compatible concrete inground pool installations
- Compatible vinyl inground pool installations
- Compatible fiberglass inground pool installations
Compatibility may vary by production year, configuration and installation. Verify your exact main drain model, thread size and part number before ordering.
Applications
- Relieving groundwater pressure beneath inground pools
- Compatible pool main drain installations
- Concrete pool construction
- Vinyl pool construction
- Fiberglass pool construction
- Replacement during pool draining and main drain service
The valve is recommended for replacement each time the pool is drained. Confirm the main drain housing and thread configuration before installation.
Specifications
| SKU | SP1056 |
| Brand | Hayward |
| Product Type | Hydrostatic Relief Valve |
| Connection | 1-1/2" / 2" MPT |
| Mechanism | Spring-Loaded |
| Seal | Self-Cleaning O-Ring |
| Material | ABS |
| Colour | White |
| Compatibility | Compatible Main Drain Sumps Designed to Accommodate Hayward SP1056 |
| Pool Construction | Concrete, Vinyl and Fiberglass |
| Application | Groundwater Pressure Relief Beneath Inground Pools |
| Replacement Guidance | Recommended for Replacement Each Time the Pool Is Drained |
| Warranty | 1-Year Manufacturer Warranty |
| Final Sale | Yes |
| Manual | Download Product Manual |
Frequently Asked Questions
It is designed to release groundwater pressure that builds beneath an inground pool shell, helping reduce the risk of hydrostatic lift and related structural damage.
The supplied application information identifies it for compatible concrete, vinyl and fiberglass inground pool installations.
The SP1056 installs into a compatible main drain sump designed to accommodate the hydrostatic relief valve.
The supplied guidance recommends replacing the valve each time the pool is drained.
Yes. This product is final sale, so confirm the main drain housing, thread size and part number before ordering.
No product videos available for this product.