This is not a standard irrigation solenoid. Standard irrigation solenoids will not suit spa or pool water, or the high temperatures of a spa. Some solenoids from Bunnings or Reece can damage the spa heater controller such as from SpaceAge or SPLASH Accessories.
Suits many solenoid flow-controlled heater controls for LAD, SpaceAge and other heater controllers.
3/4" BSPT / 20mm Thread