The Current USA 8 watt UV Upgrade for Prime Chillers can be integrated into the following chillers: Current USA 1/4HP Prime Inline Aquarium Chiller (Dual Stage Controller)Current USA 1/4HP Prime Inline Aquarium Chiller (Single Stage Controller)Current USA 1/3HP Prime Inline Aquarium Chiller (Dual Stage Controller)Current USA 1/3HP Prime Inline Aquarium Chiller (Single Stage Controller)Each of the Current USA Chillers (listed above) can take one or two UV Upgrades. No other parts are needed to integrate the UV Upgrades.Product Manual (pdf file in new window)