LG Washing Machine Bellows

The LG Washing Machine Drain Plunger Valve Bellows (Part Number: 4378EU2001A) is an authentic original equipment manufacturer (OEM) replacement rubber seal component designed for LG top-load and semi-automatic washing machines. Installed inside the lower drain valve housing assembly, this 119.6mm EPDM rubber bellows works in tandem with the drain motor or pull-rod mechanism. It expands and compresses to seat the valve head tightly against the tub drain port during wash and rinse cycles, then pulls back to release wastewater during drain and spin stages.

Key Features

• Durable EPDM Rubber Construction: Molded from heavy-duty 1.8mm-thick black EPDM elastomer engineered to resist continuous exposure to detergents, bleach, hot water, and mechanical stretching.

• Precision Accordion Folds: Designed with a flexible pleated bellows body that provides smooth expansion and contraction under pull-cord and spring tension.

• Exact Factory Dimensions: Precision-engineered with a 33mm outer diameter and 119.6mm length to guarantee an airtight, watertight seal inside the drain valve chamber.

Benefits

• Solves continuous water draining, washing machines failing to fill/hold water, or slow drain leaks caused by hardened, torn, or mineral-crusted rubber seals.

• Restores proper water level retention so wash and rinse cycles run efficiently without constant water top-ups.

• Direct OEM replacement ensures exact seating against the valve seat without binding.

Applications

Designed specifically for select LG top-load and semi-automatic washing machine models requiring part number 4378EU2001A.

What's Included

• 1 x Genuine LG Washing Machine Drain Plunger Valve Bellows (4378EU2001A)

Usage Instructions

1. Unplug the washing machine from the main AC electrical outlet and turn off water supply valves before starting repairs.

2. Tilt or safely support the machine to access the lower drain valve assembly at the bottom of the outer tub.

3. Unscrew the threaded outer cap on the drain valve casing.

4. Carefully pull out the internal compression spring, linkage rod, and the old worn rubber plunger bellows.

5. Clean out any lint, coins, or detergent scale from inside the plastic valve housing chamber.

6. Insert the new LG 4378EU2001A EPDM bellows onto the plunger shaft/spring, seat it into the housing, hand-tighten the threaded cap securely, upright the machine, and test for water retention.

Safety Instructions

• Disconnect main AC electrical power and ensure all water is drained before disassembling lower valve components.

Care Instructions

• Routinely clear out the drain valve chamber to prevent sharp debris (pins, coins) from puncturing the rubber bellows folds.

Technical Specifications

Attribute	Specification
Brand	LG
Model / Part Number	4378EU2001A
Component Type	Top-Load Washer Drain Plunger Valve Bellows
Material	Extruded EPDM Rubber (1.8 mm Thickness)
Outer Diameter	33 mm
Total Length	119.6 mm
Color	Black
Package Contents	1x Drain Plunger Valve Bellows