Whirlpool Refrigerator Lokring 8 mm to 6 mm brass reducer/coupler, also cataloged as a sealed-system service valve or refrigerant tubing connector W11504420, Replaces W10890102, W10895723

Genuine Whirlpool sealed-system Lokring reducer/coupler joining 8 mm (5/16 in.) and 6 mm (1/4 in.) refrigerant tubing. The part is used in refrigerator and freezer sealed-system repairs.

Is This the Right Part?

✅ Cross Reference Information

Common Symptoms

• Refrigerator or freezer temperatures rise or fail to recover when a sealed-system refrigerant leak is present.
• An accessible tubing joint may show oily residue or physical damage; this is only an inspection clue and does not confirm that W11504420 is the failed part.
• A qualified sealed-system test may identify a refrigerant leak at the 8 mm-to-6 mm connection.

Check Before Replacing

• Confirm the exact appliance model's official repair-parts list calls for W11504420 (identified as 8/6 NR MS 00) at the applicable sealed-system tube junction before ordering or servicing.
• Without loosening, cutting, or disturbing refrigerant tubing, visually inspect any safely accessible connection area for obvious damage or oil residue.
• Have a qualified sealed-system technician evaluate cooling loss and perform refrigerant recovery, leak testing, and recharge as required; do not use symptoms alone to diagnose this coupler.

Pro Tip

Part Details

Key Features

• Genuine Whirlpool OEM part W11504420.
• Brass Lokring reducing connector.
• Connects 8 mm and 6 mm refrigerant tubing.
• Listed in Whirlpool repair-parts literature as “8/6 NR MS 00”; NR denotes a reducing connector and MS denotes brass.
• Used for refrigerator/freezer sealed-system tubing repairs.

Installation Notes

• This is a sealed-system repair involving refrigerant recovery and recharge; Whirlpool/Sears guidance supports service by a trained, licensed refrigeration/appliance technician.
• Use the specified Lokring connection method and appropriately sized professional tooling for the model-specific repair location.
• Do not substitute a different-size or different-material Lokring connector based only on appearance; follow the appliance's repair-parts documentation.
• For Whirlpool products using aluminum heat-exchanger tubing, Whirlpool specifies a Lokring connection rather than brazing for applicable sealed-system repairs.

Verified Compatible Models

10667802410, 10667803410, 10667809410, AZF33X16DW08, AZF33X18DW06, AZF33X20DW06, MZF34X18FW06, MZF34X20DW06, WRQA59CNKZ, WRT312CZJB00, WRT312CZJV00, WRT312CZJW00, WRT312CZJZ00, WSZ57L18DM06, WSZ57L18DM07

Fitment reminder: Match the complete appliance model number, including suffix or revision where applicable, before ordering.