Customer Questions and Answers for Tube Insert (Compression Fitting) by Whirlpool

This small insert slides into the end of plastic water tubing to reinforce it for a compression-style connection. It helps create a secure, leak-resistant seal at valves and couplings on appliance water lines.

• Supports the tubing wall so the ferrule and compression nut can tighten without collapsing the tube
• Helps prevent drips or seepage at the connection point
• Useful when the tubing end is cracked, deformed, or won't hold a tight seal
• Common symptoms include leaks at a fitting, a connection that won't stay tight, or restricted flow from a pinched tube end

• Shut off the water supply and disconnect power before servicing
• Cut the tubing square; remove any damaged section and deburr the edge
• Slide the compression nut and ferrule onto the tube, fully seat the insert, then assemble the fitting—do not overtighten
• Restore water and check all connections for leaks