mains switch pump over run.
"Mains switch pump over run is ideal for preventing electrical cord damage when a pump is left to run unsupervised."
Salus Mains Switch Wireless Pump Over Run Switch GGPC1
Mains Switch RF Solution Wireless Pump Overrun Switch
Salus Mains Switch GGPC1 RF Solution Wireless Pump Overrun Switch - UK Seller!
