Whole House UltraViolet Systems
This page carries whole-house UV water disinfection systems and parts: the USWF 4C151 (15 GPM) and 4C101 (10 GPM) systems, plus Viqua and Aqua Flo replacement lamps, quartz sleeves, a UV sensor and a lamp kit. Match each replacement part to your system model.
What UV does and doesn't do
UV light disinfects water as it passes the lamp, but it does not remove chlorine or sediment. NSF/ANSI 55 defines two classes: Class A systems inactivate bacteria, viruses and cysts, while Class B systems reduce non-disease bacteria. Check each product page for certification. Install sediment prefilters ahead of a UV system, since UV does not remove particles.
Lamp and sleeve upkeep
Viqua rates its UV lamps for 9,000 hours and recommends changing them yearly. Viqua lamps on this page include the 602855, 602856, 602805, 602807 and S463RL, and sleeves include the QS-012, QS-810, QS-463, 602733 and 602734. The 650580 is a UV sensor and the 602810-102 is a kit, and an Aqua Flo lamp is also available. Each part must match your system, so check the product title. Shop more UV replacement lamps and UV quartz sleeves.
Common questions
Do whole-house UV systems work?
A whole-house UV system disinfects water by exposing it to UV light. Under NSF/ANSI 55, Class A systems inactivate bacteria, viruses and cysts. Results depend on correct sizing for your flow rate, a working lamp, and prefiltered water.
What GPM do I need?
The GPM you need matches your home's peak water flow rate, so choose a system rated at or above it. The USWF 4C101 is rated 10 GPM, and the USWF 4C151 is rated 15 GPM.
Should I install a prefilter before whole-house UV?
Yes, a prefilter is recommended before a whole-house UV system, because UV does not remove sediment. A sediment filter installed ahead of the UV unit handles particles before the water reaches the lamp.
How often should you change the UV lamp?
A Viqua UV lamp is rated for 9,000 hours, and Viqua recommends changing it yearly. For USWF and Aqua Flo lamps, follow the manufacturer's replacement interval listed on the product page.
