Are anti-limescale (anti-cal) shut-off valves just a marketing stunt?

Question

I have found anti-lime (anti-cal) valves, they were ball valves with a plastic ball inside instead of the usual brass/chrome.

Is it a marketing trick or is the plastic ball inside better in any way then the commons for sink/tap water or washing appliances like washing machines or dishwashing machines.

If they really work, does clearing limescale really matter?

d.george · Answer

Since most scale is a reaction between chemicals in water and a metal surface, using a plastic ball in theory will not allow the scale to build up on the ball. If you are using these valves on domestic water they would probably be a waste of time Unless your water is extremely hard or has an excessive amount of chemicals in it.

Answered by d.george on April 24, 2021

Are anti-limescale (anti-cal) shut-off valves just a marketing stunt?

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