The W11504420 is an OEM Lokring tube coupler used in refrigerator sealed systems. This 8mm-to-6mm brass reducer creates a permanent, vibration-resistant connection between refrigerant lines — no soldering required. It's the correct factory replacement for refrigerators showing refrigerant leaks or cooling failures caused by a failed tube joint.

✓ Model-Specific Repair Pages

Don't see your model? Contact us and we'll confirm compatibility.

This coupler is part of the refrigerator's sealed refrigerant system. It connects copper or aluminum tubing sections using Lokring's press-fit technology — a factory-approved method that creates a leak-proof joint without heat or flux. Correct sizing (8mm inlet, 6mm outlet) is critical for proper refrigerant flow.

✓ Common Symptoms Fixed

Refrigerant leak at tube junction, refrigerator not cooling or cooling inconsistently, ice maker not producing ice, frost buildup in freezer, compressor running constantly without reaching temperature.

✓ Key Features & Specifications

OEM part number W11504420. Replaces W10890102 and W10895723. 8mm-to-6mm brass reducer coupler. Lokring press-fit technology — no soldering required. Compatible with Whirlpool, Maytag, Amana, and Jenn-Air refrigerator models. Sold individually.

✓ Buying Options

OEM/New — The original factory part manufactured to Whirlpool specifications. Recommended for sealed system repairs where exact fit and certification matter.

These aftermarket replacement parts are not affiliated with, sponsored by, or endorsed by Whirlpool or any OEM manufacturer.

✓ Replacement Part Numbers

W11504420 (OEM) | W11504420XP (aftermarket cross-reference) | Replaces: W10890102, W10895723

✓ Installation Tips

Recover all refrigerant before opening the sealed system — this is required by law. Cut tubing cleanly and deburr before inserting into the Lokring coupler. Use the correct Lokring pressing tool to crimp the fitting — do not use pliers or substitute tools. Pressure-test the system before recharging with refrigerant. This repair is recommended for certified appliance technicians only.

✓ Compatible Models

10667802410, 10667803410, 10667809410, AZF33X16DW08, AZF33X18DW06, AZF33X20DW06, MZF34X18FW06, MZF34X20DW06, WRQA59CNKZ, WRT312CZJB00, WRT312CZJV00, WRT312CZJW00, WRT312CZJZ00, WSZ57L18DM06, WSZ57L18DM07, WZF34X16DW08, WZF34X16DW09, WZF34X18DW06, WZF34X18DW07, WZF34X20DW04, WZF34X20DW05, WZF56R16DW08, WZF56R16DW09, WZF57R16FW08, WZF57R16FW09, WZF79R20DW06, WZF79R20DW07

✓ Frequently Asked Questions

Is this the right coupler for my model? Check the Compatible Models list above or contact us with your full model number.

Do I need a special tool to install this? Yes — Lokring fittings require a dedicated pressing tool. Standard crimping tools will not create a proper seal.

Can I install this myself? Sealed system repairs require EPA 608 certification to handle refrigerants legally. We recommend a certified technician.

What does this part replace? This part directly replaces W10890102 and W10895723.