Pump adjustment kit PP217 or HA3020. Used in every low pressure oil fired heater made by DESA and TORO PP217: Pump Adjustment Kit Parts included:M27694: Adjusting Screw currently black, not yellow M22997: Plug currently black, not yellow M8940: Ball M10993-1: Spring DESA BRANDS: Dayton, Knipco, Koehring, Master, Reddy, Remington, Sears, and TSC: (PP217, HA3020) Same as Mr Heater # 21284 Toro Brands: Champion, Toro, Lawn Boy, Guardian, Red Line, Green Line, Arctic Flame, Century and more