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AquaCal 0040S External Flow Relay (Grid Flow) Switch Kit
 Switch Kit "Pin It")
AquaCal 0040S External Flow Relay (Grid Flow) Switch Kit
* Used when the pool / spa elevation is higher than the heat pump.
* Used when a variable two-speed filter pump set on low-speed mode does not provide enough water pressure to activate a heat pump’s water pressure switch.
* Also used for automatic pool / spa thermostat switching.
ECS0040S ECS 0040S
* Used when the pool / spa elevation is higher than the heat pump.
* Used when a variable two-speed filter pump set on low-speed mode does not provide enough water pressure to activate a heat pump’s water pressure switch.
* Also used for automatic pool / spa thermostat switching.
ECS0040S ECS 0040S
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