LSE Lighting UV-C Replacement Kit for Viqua D4 — 43W 15.5" Lamp with Quartz Sleeve & O-rings

The LSE Lighting 602805 kit is a complete replacement assembly containing a 43W UV-C bulb and a quartz sleeve engineered to fit Viqua D4 series ultraviolet water systems.

Keep your Viqua D4, D4+, D4-V or D4-V+ system running at designed performance with this purpose-made maintenance kit. It combines a 15.5-inch (391 mm) 43W UV-C lamp rated for up to 12,000 hours with a precision quartz sleeve and O-rings to restore proper lamp positioning and system sealing. Manufactured by LSE Lighting in an EPA-registered facility, the kit replaces worn components quickly to avoid downtime and preserve the unit's UV intensity and water flow characteristics.

How does this kit restore my Viqua D4 system’s performance?

Replacing both the lamp and the quartz sleeve refreshes the system’s UV output and optical clarity in one service visit. The lamp supplies 254 nm UV-C energy while the new sleeve ensures that light transmits through clear, undamaged quartz rather than cloudy or fouled glass.

• Includes matched lamp and sleeve to meet original equipment dimensions.
• New O-rings recreate the factory seal to prevent leaks and maintain chamber pressure.
• 12,000-hour lamp life reduces frequency of replacements for easier maintenance.

Is this kit directly compatible with my Viqua D4, D4+, D4-V or D4-V+?

Yes — the 602805 kit is engineered as a direct replacement for Viqua D4 family systems. It follows the same physical and electrical specifications so installation is straightforward and reliable.

• 15.5" (391 mm) lamp length matches OEM D4 lamp size.
• Designed to fit the D4 series lamp holder and sleeve housing without modification.
• Supplied O-rings sized for original chamber sealing points.

What are the practical benefits of the 43W UV-C lamp and quartz sleeve combo?

Replacing lamp and sleeve together maximizes UV transmission and preserves system efficiency, helping maintain designed flow rates and in-chamber exposure. The long-life lamp reduces service intervals while the new sleeve avoids light-blocking deposits or scratches.

• High-output 43W lamp for intended chamber UV intensity.
• Quartz sleeve restores clear optical path for consistent performance.
• Factory-quality components cut troubleshooting time after service.

How do I replace the bulb and sleeve safely and correctly?

Always disconnect power and follow the Viqua D4 service instructions; the LSE kit uses the same handling steps as the original parts. Replace O-rings, seat the sleeve properly, and install the lamp without touching the glass to avoid oils that shorten lamp life.

• Turn off power and relieve system pressure before opening the chamber.
• Install supplied O-rings and slide in the quartz sleeve fully seated at both ends.
• Handle the lamp with gloves or a clean cloth and verify proper lamp-holder engagement.

Who this kit is for: The LSE Lighting 602805 43W UV bulb and quartz sleeve combo is for homeowners, service technicians, and facilities managers who own or maintain Viqua D4 series ultraviolet water systems and need a reliable, OEM-compatible maintenance kit that restores designed UV performance and system sealing. It’s ideal for routine annual service, system refurbishing after extended operation, or when replacing degraded sleeves and lamps to preserve consistent water-treatment operation.