Limescale Leakage

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A few customers have complained about a hissing sound coming from the pressurestat. If you look closely at the pictures below you can see a discoloration (greenish). It is limescale that created the opening in the elbow, then the descaler removed the limescale to cause a leak at the elbow. Descaler turns most boiler parts into a pinkish color. In this case, with machine unplugged and cold, one would need to remove the thermostat and then the elbow. Place thread seal tape around the threads of the elbow and tighten back on.

Close-up of electrical wires and connectors attached to a metal cylinder, possibly part of a machine or appliance, with various copper pipes and cables visible in the background—signs of limescale build-up are present. © 2025 1st-line.com
Close-up of a frosted metal component inside a mechanical or refrigeration unit, showing ice buildup and possible limescale on pipes and fittings, with visible screws, wiring, and copper tubing that may indicate leakage issues. © 2025 1st-line.com

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