Jandy Gas Valve Natural LX LT Lo NOx Replacement Kit R0386600 Used on the followin models: LX-L 250, 400 LT-L 250, 400 For More information You can click on the images to enlarge them. The images give important information on the orientation of the gas valve when being installed in all LX/LT Model swimming pool/spa heaters. The instructions must followed exactly. Read through the completely before starting the procedure. These instructions are to be used with the following Replacement Kits: R0336800-Natural Gas Valve Replacement Kit, Pool Heater Model LX/LT R0336900-Propane Gas Valve Replacement Kit, Pool Heater Modal LX/LT R0386600-Natural Gas Valve Replacement Klt;nPooIHeater Model LX/LT Low NOx Page 1 Page 2