When to Replace Your Series 1 Water Tank
By Fellow Products | Published: 2026-10-27
Category: Tips & Care
Learn the signs that indicate it's time to replace your Fellow Series 1 water tank, plus care tips to extend its lifespan.
Quick answer
Replace your Series 1 water tank when you notice cracks, persistent leaks, mineral buildup that won't clean off, or if the tank no longer fits securely in the machine. Regular cleaning can extend its life, but physical damage or degraded seals mean it's time for a new tank.
Why the water tank wears out
The Series 1 water tank is a lift-out plastic component that handles daily temperature changes and mineral-rich water. Over time, the plastic can become brittle, especially near the connection points. The tank's seals may also degrade, leading to slow drips or poor fit. While the tank is designed for durability, it's a consumable part that eventually needs replacement.
Care tips to extend tank life
Empty and rinse the tank after each use to prevent mineral scale buildup. Once a month, clean it with a mild descaling solution (follow your machine's descaling instructions) and a soft brush. Avoid using abrasive scrubbers or putting the tank in a dishwasher, as heat and harsh detergents can warp the plastic. Storing the tank dry when not in use also helps prevent mold and odors.
Diagnosis: Is it time to replace your water tank?
- Symptom: Water pooling under the machine or around the tank base. Visible cracks or chips in the plastic. The tank wobbles or doesn't sit flush in its compartment. Mineral scale that won't scrub off. Cloudy or yellowed plastic.
- Likely cause: Normal wear from thermal cycling and mineral exposure. The plastic has become brittle or the tank's seals have deteriorated. Cracks often start at stress points near the handle or outlet. If you see cracks, stop using the tank immediately to avoid electrical damage to the machine.
- Corrective action: First, try deep cleaning with a descaling solution and a soft brush to remove scale. If the tank still leaks or doesn't fit properly, purchase a genuine Series 1 replacement tank. Install by lifting out the old tank, rinsing the new one with clean water, and placing it into the machine. Always use a genuine replacement part to ensure compatibility and avoid voiding your machine's warranty.
- When to stop or choose another option: If the machine itself shows signs of internal leaking (water inside the machine body, electrical issues, or error codes), the problem may be beyond the water tank. In that case, contact Fellow support or a qualified technician before replacing the tank.
Replacement part you may need
- Series 1 Water Tank: A replacement lift-out water tank designed for use with Espresso Series 1. Not compatible with Aiden Precision Coffee Maker. If your original tank is damaged or leaking, this genuine replacement ensures proper fit and function for your Series 1 machine.
Series 1 Water Tank
