HQUA 55W Replacement UV Lamp for TWS-12/TWS-121 — 19in 4-Pin, Ballast-Compatible

The HQUA-TWS-12L is a 55W, 19-inch replacement UV lamp engineered to restore germicidal performance in compatible HQUA-TWS-12 and TWS-121 water purification systems.

When a UV lamp ages or fails, your HQUA UV system can no longer provide the intended ultraviolet exposure for disinfecting water. This HQUA-TWS-12L replacement lamp is sized and rated to match the original factory specifications so you can quickly return your purifier to proper operation. The details below explain fit, electrical requirements, and practical installation notes to help you choose the correct replacement part.

Will this UV lamp fit my HQUA-TWS-12 or TWS-121 system?

Yes — the lamp is built specifically for HQUA-TWS-12 and TWS-121 housings and aligns with the original mechanical and electrical interfaces.

• Length: 19 inches (approx. 48.3 cm) to match the lamp chamber.
• Diameter: 0.6 inch tube diameter for the existing sockets.
• Base: 4-pin standard base compatible with original lamp holders.
• Compatible ballasts: designed for TWS-455EB and TWS-12EB ballasts.

What are the electrical and performance specifications I should know?

This lamp operates within the electrical envelope the original system was designed for, ensuring safe and reliable replacement without modifying the ballast or wiring.

• Power rating: 55 watts for intended UV output and system balance.
• Current: 800 mA operating current consistent with specified ballasts.
• Ballast pairing: optimized for TWS-455EB and TWS-12EB to ensure correct striking and steady operation.
• Connector: 4-pin base provides secure electrical contact and correct orientation.

How do I replace the HQUA-TWS-12L lamp safely and correctly?

Replacing the lamp requires basic care to protect the tube and ensure system safety; always follow manufacturer instructions and power-down procedures.

• Power off and disconnect the purifier before servicing to prevent electrical hazard.
• Wear clean gloves or use a cloth — oil from skin can reduce lamp life and performance.
• Match the 4-pin base orientation and gently seat the lamp into the holders without forcing.
• Verify ballast compatibility (TWS-455EB or TWS-12EB) before switching the unit back on.

How will I know when the lamp needs replacement?

UV lamps gradually lose output even if they still illuminate, so replacement is time-based and also signaled by performance indicators on many systems.

• Replace according to the purifier’s recommended lamp-life interval (typically yearly for many systems).
• If your unit reports low UV intensity or fails a performance check, the lamp may be the cause.
• Visible flicker, difficulty starting, or physical damage are clear signs to replace the tube.
• Using an OEM-equivalent HQUA-TWS-12L maintains system specifications and safety margins.

Who is this for: The HQUA-TWS-12L replacement lamp is intended for owners and service technicians of HQUA-TWS-12 and TWS-121 UV water purifiers who need a direct-fit, factory-spec 55W lamp. Choose this lamp if you require the correct length, 4-pin base, and compatibility with TWS-455EB or TWS-12EB ballasts to restore proper UV performance in residential or light-commercial systems. If your system uses a different ballast, lamp length, or base type, verify specifications before purchasing to ensure safe, reliable operation.