Compatibility: Flow switch compatible with Intellichlor salt chlorinator IC-15, IC-20, IC-40, IC-60 systems. Replaces part number 520736. Helps protect your salt and chlorine equipment. Designed to last in various weather conditions. Easy Connection: Flow switch features 4 button connectors, waterproof and moisture-resistant design for easy wire connection at both ends. Includes sealant tape to prevent leaks. Arrow on switch indicates water flow direction for correct installation. Sensitive Detection: Red, black, and blue wires detect water flow. White and green wires detect temperature. This product addresses water flow and temperature issues for Intellichlor salt systems only. Does not measure salinity and will not resolve low salt readings. Easy Installation: Compatible with 2-wire, 3-wire, and 4-wire cells. Pre-stripped wires allow quick installation. Typically takes only a few minutes to eliminate the "no flow" warning light. What You Will Get: 1 x Flow Switch, 1 x Waterproof Sealing Tape, 4 x Button Connectors Color: As shown in photo Material: Plastic Package Contents: 1 x Flow Switch Note: Light reflection and different display settings may cause slight color variations between the image and the actual item. Measurement may vary by +/- 1-3 cm.