Quick view LMI 48646 LMI COUPLING KNOB, 4FV MSRP: $10.00 48646 LMI Metering Pump Part 48646 LMI Metering Pump Repair Part – COUPLING KNOB, 4FV, LMI Chemical Metering Pumps & Pump Repair Parts Available Online! There are thousands of LMI Pumps and we can help you find the right model for... MSRP: $10.00 Add to Cart The item has been added Add to Wish list Compare