Product Description

The Kirby Classic III Bag Top in brown rubber (part number Star KB331R) is a genuine replacement bag top connector for Kirby direct-sale vacuum systems. This rubber bag top seals the vacuum bag to the main motor head, maintaining proper suction and airflow during operation. It is a critical wear component that ensures your Kirby operates at peak performance.

Crafted from durable brown rubber, this bag top features a secure connection design that locks onto the bag collar without slipping or leaking. The rubber material resists cracking and maintains flexibility through regular use, providing years of dependable service when properly maintained.

Compatible with Kirby G-series vacuums: G4, G5, G6, G7, Sentria I, Sentria II, Avalir I, and Avalir II. Cross-compatibility across these models makes this an essential inventory item for Kirby owners with multiple machines or those upgrading within the G-series line.

Swiss Boy Vacuum is an authorized Kirby dealer serving the Wasatch Front since 1963. Located in Bountiful, Utah, we stock genuine Kirby parts and provide expert service for all G-series models. Call 801-298-3656 for availability or questions about your Kirby system.

Why Choose This Product?

• Genuine Kirby part (Star KB331R) — ensures perfect fit and seal
• Durable brown rubber construction — resists cracking and maintains flexibility
• Cross-compatible with G4, G5, G6, G7, Sentria I&II, and Avalir I&II models
• Critical component for maintaining proper suction and bag seal
• Easy installation — direct replacement, no tools required
• Part of Swiss Boy's complete Kirby parts inventory

Specifications

• Brand: Kirby
• Part Number: Star KB331R
• Material: Brown rubber
• Type: Bag top connector/collar
• Compatible Models: G4, G5, G6, G7, Sentria I, Sentria II, Avalir I, Avalir II

Compatibility

• Kirby Models: G4, G5, G6, G7, Sentria I, Sentria II, Avalir I, Avalir II

Use Case

This bag top replacement is essential for Kirby G-series owners experiencing loss of suction, bag leakage, or difficulty securing the bag to the motor head. The rubber deteriorates over time due to heat and regular compression cycles. Replacing a worn or cracked bag top restores proper airflow, improves filtration, and prevents unfiltered air from bypassing your motor — protecting both cleaning performance and motor longevity. Recommended maintenance every 3-5 years depending on use.