Flushing Gun 4300-15 - Nu-Calgon 4300-15 - 13 Lb Canister Rx11 Flush Rx11-flush® 1lb. canister flushes 3-4 tons. During such an event, the refrigeration system becomes contaminated with large quantities of unwanted particulate, sludge, acids, carbon residues and possibly moisture. Item: Flush Injection Tool Application: Cleaning Of Refrigerant Lines For Use With: Mfr., No. Nu-Calgon 4300-50, Rx11 Line Flushing Tool Reusable valve does not pierce the pressurized can., Use with Nos. From time to time, refrigeration and air conditioning systems suffer failures which result in contamination. Nu-Calgon 4300-38 Rx11-flush Liquid Starter Kit At a glance Brand Nu-Calgon Dimensions 4.40 x 2.70 x 1.90 Inches Material Flush Line Set Tool Pack quantity 1 Condition New Occasion Holiday The NU-CALGON flush injection tool screws directly to the Rx11-Flush pressurized canister and attaches to the flush hose to inject cleaning/flushing product into a refrigeration system. This makes it ideal for system flushing after burnouts, retrofits and for flushing line sets for R-410A conversions. All of these contaminants must be removed before the system can be returned to duty.