Gicar Flowmeter O-Ring – 1.78mm x 28.30mm ID

This is an OEM-specification replacement O-ring for the Gicar flowmeter assembly used in commercial and prosumer espresso machines. The flowmeter O-ring creates a watertight seal within the flowmeter body, preventing water leakage around the rotor assembly and ensuring accurate volumetric dosing. A worn or damaged O-ring will cause water to bypass the flowmeter, resulting in leaks, inaccurate dose volumes, and potential water damage to surrounding components.

Technical Specifications

• Material: Rubber
• Ring thickness: 1.78mm
• Internal diameter: ø 28.30mm
• Weight: 100g

What Is a Gicar Flowmeter and Why Does the O-Ring Matter?

Gicar flowmeters are used in many commercial and semi-commercial espresso machines to measure and control the volume of water delivered to the group head for each shot. The flowmeter contains a small paddle-wheel rotor that spins as water passes through — the O-ring seals the rotor chamber to prevent leakage. Without a good seal, water bypasses the rotor, causing dosing inaccuracies and internal leaks.

When Should You Replace the Flowmeter O-Ring?

Replace this O-ring if your espresso machine is showing any of the following: water leaking from the flowmeter body, inconsistent or drifting volumetric doses, the machine delivering more or less water than programmed, or during any routine flowmeter service or disassembly.

How to Replace the Gicar Flowmeter O-Ring

Isolate the machine from power and water and depressurise the system before starting. Remove the flowmeter from the hydraulic circuit, disassemble the flowmeter body, extract the old O-ring using a pick tool, clean the seating groove thoroughly, and fit the new O-ring ensuring it seats evenly without twisting. Reassemble and test for leaks before returning the machine to service. Bear Coffee Machine also offers professional in-house servicing if preferred.

Frequently Asked Questions

Which espresso machines use the Gicar flowmeter? Gicar flowmeters are used across a wide range of commercial and prosumer espresso machine brands. If you are unsure whether this O-ring suits your specific flowmeter model, contact our technicians with your machine’s brand, model, and the flowmeter part number before ordering.

Is this a genuine Gicar part? This is an OEM-specification O-ring sized to the Gicar flowmeter assembly dimensions (1.78mm x ø 28.30mm).

Can Bear Coffee Machine service my flowmeter? Yes — we offer in-house repair and servicing for espresso machines. Contact us to arrange a booking.