Item Number: 902518A Fits SolarPro Pool Heaters The Solar Multiple Heater Bypass Kit lets you connect multiple Solar pool heaters for more efficient solar heating power. With this, you have the ability to connect multiple Solar Heaters in order to heat larger pools more efficiently. The Solar multiple heater bypass kit is required for hooking up 2 or more solar heaters. With the Solar Multiple Heater Bypass Kit, you can now use the energy and cost saving SolarPro Heater with in-ground pools. To install multiple Solar Pro units, you MUST use a bypass valve and "T" connector with pressure gauge. The hose for a multiple unit installation MUST be at least 1/2" in. diameter. ** Please Note: The Solar multiple heater bypass kit is also required if you plan to use a SolarPro pool solar heater with a pool pump that is 1 HP or greater.** Solar Heater Bypass Kit includes: (1) Bypass Valve 1 - "T" Connector with Pressure Gauge (1) 6" 1.5" Flex Hose (2) 1.5" ID to 2" OD Adapters (6) Hose Clamps