Hayward 1.5″/2″MPT Hydrostatic Relief Valve | SP1056Product Overview The Hayward SP1056 1. 5" 2" MPT Hydrostatic Relief Valve is a genuine Hayward replacement valve designed to help protect in ground swimming pools from damage caused by external groundwater pressure. When a pool is drained, groundwater pressure beneath the pool shell can build up and potentially cause structural damage. This spring loaded relief valve helps release that pressure safely through the main drain or sump area. Made from

allowing the pump to adjust performance for efficient circulation and improved system control

Back Port Inlet: Designed with a discreet back port for the water supply connection

Confirm circuit requirements

Supports consistent chlorine production from dissolved pool salt

Includes 2" x 2

Pentair EQ Series pumps

Why Choose Hayward AquaNaut® 200

while the EPS core helps reduce weight and resist moisture-related damage

This product is a chemical primer and should be handled carefully

The added relays are typically displayed as HVR5 through HVR8 in the OmniLogic relay table

This 2-pump commercial system is commonly supplied with the IntelliChem controller

internal automatic vertical float switch