Description
The Excelight EL720L UV Lamp & EL720Q Quartz Sleeve are genuine replacement components for the Excelight EL720AK ultraviolet (UV) water disinfection system and other compatible 8 GPM UV units. This lamp & sleeve combo restores your system’s ability to inactivate harmful microorganisms—such as bacteria, viruses, and protozoa—ensuring your water stays microbiologically safe without chemicals.
Key Features
- Complete replacement set: Includes the EL720L UV lamp and EL720Q quartz sleeve, the two core parts that enable effective UV-C disinfection.
- High-quality construction: Both components are OEM-designed for durability, optimal light transmission, and reliable fit.
- Maximum UV performance: Designed to deliver the correct UV dose for safe water treatment at up to ~8 GPM flow rates.
- Simple maintenance: Quick swap-out parts that make annual servicing fast and easy.
- O-rings included: Sleeve often ships with replacement O-rings for a proper seal.
Compatibility
Compatible UV Systems
The EL720L lamp and EL720Q quartz sleeve are made to fit Excelight Waterite Technologies UV systems with an ~8 gallon-per-minute capacity, including:
- Excelight EL720AK 8 GPM UV disinfection system
- Some Purifiner and Water Depot UV systems that use the same electrical base and chamber size as Excelight units (8 GPM models).
Tip: If your system is not labeled “Excelight,” you can often verify compatibility by measuring your existing lamp and sleeve — the EL720L is typically ~25 3/8″ long and the EL720Q sleeve ~26 3/16″ long.
Specifications
UV Lamp – EL720L
- Model: EL720L UV lamp
- Technology: UV-C germicidal output
- Lamp Life: ~9,000 hours (≈ 1 year) recommended replacement cycle
- Wattage: ~32 W typical for 8 GPM units
Quartz Sleeve – EL720Q
- Model: EL720Q quartz sleeve
- Material: High-purity UV-transparent quartz glass
- Function: Protects the lamp from water contact and allows maximum UV transmission
- Includes: Replacement silicone O-rings for sealing
Applications
This lamp & quartz sleeve set is ideal for:
- Residential and cottage UV water disinfection
- Well water treatment systems
- Point-of-entry UV systems up to 8 GPM
- Replacement maintenance during routine UV system servicing
By keeping UV components fresh and fully transparent, you maintain effective disinfection at the design flow rate, helping protect against pathogens like E. coli, coliforms, Giardia, and Cryptosporidium without adding chemicals.
Maintenance & Replacement
- Annual lamp replacement: The UV lamp gradually loses intensity over time, so replacing the EL720L every ~9,000 hours or once a year ensures continuous performance.
- Quartz sleeve care: Inspect the quartz sleeve during every lamp change. If it appears cloudy or has mineral scale that cannot be cleaned off, replace it with the EL720Q to maintain UV efficacy.
- O-ring hygiene: Always replace O-rings when servicing the sleeve; lubricate lightly with silicone grease for a good seal.
Why Replace Both Together?
The UV lamp and quartz sleeve work as a pair: the lamp generates the germicidal UV-C light, and the sleeve protects it while letting the light reach the water. Over time the sleeve can accumulate scale or become damaged, blocking UV light and reducing effective disinfection. Replacing both helps restore your system to like-new performance and avoids the common issue of replacing a lamp but leaving a fouled sleeve in place.
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