This Danfoss pump designed for small/medium-sized domestic oil burners and fit a multitude of Oil burners. This pump has the 2- pipe screw under the cover. Without the horse-shoe-shaped washer the pump has been adjusted for 2-pipe operation and with the washer the pump has been adjusted for 1-pipe operation. The Danfoss Oil Pump, BFP41 L3, is designed for small and medium-sized domestic oil burners. The pump has the 2- pipe screw under the cover. Without the horse-shoe-shaped washer, the pump has been adjusted for 2-pipe operation. With the washer, the pump has been adjusted for 1-pipe operation. .
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