Quartz Sleeve (15/25w Yamitsu)

If your Yamitsu UV clarifier isn’t delivering the clarity it should, the quartz sleeve may be the issue. The Quartz Sleeve (15w / 25w Yamitsu) is a replacement glass sleeve designed to fit 15 watt and 25 watt Yamitsu UV units.

The sleeve creates a sealed barrier between the UV-C lamp and pond water, allowing ultraviolet light to pass through while protecting the electrical components inside the unit.

Why it matters

• Protects the UV lamp from direct water contact
• Maintains correct UV transmission
• Supports effective green water control
• Essential for safe UV operation

A cracked, cloudy or heavily scaled sleeve reduces UV performance, even if the lamp has been replaced.

When to replace

Consider replacing the sleeve if you notice:

• Visible cracks or chips
• Persistent limescale or mineral staining
• Water inside the UV housing
• Reduced water clarity despite a new bulb

Installation & Safety

• Always unplug the UV unit before servicing.
• Allow the lamp to cool before handling.
• Handle the quartz sleeve carefully — it is fragile.
• Inspect and refit O-rings correctly to prevent leaks.

Replacing a worn quartz sleeve helps restore full UV efficiency and keeps your 15w or 25w Yamitsu unit operating safely and effectively.