HQUA Germicidal UV Tube Replacement for OWS-12 Series — 40W 36.4in 2-Pack, 4-pin

The HQUA-OWS-12L 40W germicidal UV tube is a direct-replacement UV lamp for HQUA OWS-12 series water purifiers, sold here as a convenient two-pack to restore UV disinfection performance.

Keep your HQUA OWS-12 family system operating at design output with these factory-compatible 40W, 4-pin germicidal lamps. Designed to emit ultraviolet light with a peak wavelength of 253.7 nm, these bulbs provide chemical-free UV treatment that does not alter taste, odor, pH, or the general chemistry of water. Each lamp is engineered to match the physical dimensions and electrical requirements of OWS-12/121/124/12T fixtures and the OWS-455EB/OWS-12EB ballasts for straightforward swap-in replacement.

How do these UV tubes work inside my water system?

These lamps produce germicidal UV-C light at the peak wavelength of 253.7 nm, which inactivates microorganisms in flowing water without adding chemicals. The process is purely physical and leaves no residual taste, odor, or chemical change in the treated water. For consistent performance, lamp output and the quartz sleeve cleanliness must be maintained according to schedule.

• Peak wavelength: 253.7 nm for UV-C germicidal action
• Operation is chemical-free and does not change water chemistry
• Works inside the HQUA UV chamber; requires clear quartz sleeve for effective transmission

What are the installation and compatibility details?

The HQUA-OWS-12L lamp is 36.4 inches long with a 0.6-inch diameter and a 4-pin standard base, making it physically compatible with OWS-12/121/124/12T housings. It runs at 40W and 425 mA and is designed to function with OWS-455EB and OWS-12EB ballasts. Installation follows the included user manual; if you encounter issues, HQUA support can assist by online chat or email.

• Length: 36.4 inches; diameter: 0.6 inch — fits specified HQUA housings
• Electrical: 40W, 425 mA; 4-pin standard base
• Compatible with OWS-455EB and OWS-12EB ballasts for plug-and-play replacements

How should I maintain and replace these UV lamps for reliable performance?

To keep the UV system effective, replace the UV lamp every 12 months and inspect or clean the quartz sleeve every 6–12 months. The sleeve can accumulate scale or film that reduces UV transmission; cleaning restores lamp effectiveness. Replace the quartz sleeve itself approximately every 24 months or sooner if damaged.

• Replace lamp annually for best germicidal output
• Clean quartz sleeve every 6–12 months to maintain UV transmission
• Replace quartz sleeve about every 24 months or if compromised

Where can these HQUA UV tubes be used?

HQUA germicidal lamps are suitable for a range of water treatment contexts, from household purification to industrial and wastewater reuse applications. They appear in residential systems to improve daily water safety, in industrial settings for process or cooling water, and in reuse projects to reduce pollution and conserve resources. Use within the lamp’s intended system ensures proper exposure and performance.

• Residential point-of-entry and point-of-use HQUA OWS-12 systems
• Industrial water supplies like irrigation, aquaculture, or production cooling
• Wastewater reuse applications where UV treatment is specified

Who is this for? This two-pack is aimed at homeowners, service technicians, and facility managers who operate HQUA OWS-12 series UV water treatment units and need genuine-spec replacement lamps. Choose this set if you require exact-fit, 40W 4-pin tubes to maintain system performance, avoid chemistry changes to treated water, and follow a clear maintenance schedule for reliable UV disinfection.