How to Replace a UV Lamp
Before changing a UV lamp, it's best to refer to the owner's manual for your specific UV system. There are many different UV system manufacturers, and the instructions provided are meant to be only a general guideline.
- Close all faucets and turn off the water supply.
- Press the pressure button to release the pressure from the cartridges.
- Unplug the power. There may be an alarm that goes off as a warning.
- Check to make sure the UV system is not too warm. You may want to allow the system to cool down for 10 minutes.
- Carefully remove the protective cover or safety cap (at the top of the UV system) by squeezing the tabs, but make sure the lamp plug wires remain connected.
- Remove the lamp plug, but make sure the strain relief wires remain connected.
- You may consider putting on latex gloves before removing the lamp or sleeve as the oils on skin can damage the UV lamp and sleeve.
- Remove the lamp/sleeve assembly along with the sleeve bolt from the chamber.
- Unscrew the UV lamp by holding the sleeve bolt.
- Unscrew the sleeve bolt and remove o-rings from the quartz sleeve.
- Clean or replace the quartz sleeve. To clean, use a cloth soaked in CLR, vinegar or some other mild acid. Rinse with water.
- Insert new o-rings and tighten the sleeve bolt to the quartz sleeve.
- Install and secure the new lamp into sleeve being careful not to over tighten which can break the sleeve.
- Insert and secure the lamp/sleeve assembly.
- Carefully align connections by rotating the ring clamp and installing the lamp plug.
- Insert the safety cap and plug the system in again.
- Open the faucets and turn on the water supply.
- Check for leaks.
- Perform the disinfection procedure per your owner’s manual.
How often should a UV Lamp Be Changed?
To maintain your UV water disinfection system, the UV lamp should be replaced on schedule. Most UV lamps are designed to run continuously for about 9,000 hours or 12 months before losing their effectiveness.
Unlike regular light bulbs, UV lamps do not burn out – they solarize. This means that they gradually lose their light wave intensity to about 60% of what a new UV bulb provides. Thus, it is important to change the lamp on time, otherwise, the system cannot effectively protect against viruses and other waterborne microbes.
Water is purified as it runs through the chamber, passing by a UV lamp which sterilizes the water from waterborne microbes with a special wavelength known as UV-C. Microorganisms present in the water will absorb the UV rays, altering their DNA so they cannot create infection or reproduce.
It is important to note that even if your UV lamp is still shining and hasn’t burnt out at 9K hours or 12 months, the ultraviolet bulb should still be replaced in your UV system as a precaution.
How to know WHEN to Replace an Ultraviolet Light Bulb?
To help you know when to replace your UV lamp, some UV systems have a "ballast" or controller that will indicate it is time to change out the lamp. The indicator may be a visual cue like a green light, an audible alarm or an LED display countdown from 365 until the replacement due date.
If your UV water disinfection unit does not have a lamp countdown, we suggest setting a calendar alarm for yourself. And as a courtesy, we send our ESP Water Product customers emails reminding them when the UV lamp is due for replacement.
Are UV Lamps Safe?
UV lamps used for germicidal purposes in UV water disinfection systems, are safely housed within a durable 304 stainless steel UV chamber. This chamber protects against UV rays leaving the chamber. In fact, safety measures are in place so that when you go to replace the lamp, you cannot take off the bolt to open the chamber without first removing the power cord.
What Is The Difference Between Hard And Soft Glass UV Lamps?
Hard glass is pure-fused Quartz and maintains its ability to transmit UV light over a longer period of time than soft glass lamp. Soft glass lamps use a glass more like normal window glass. The UV light causes this glass to solarize and inhibits the transmission of UV light. Normally soft glass has a life span of 90 days and hard glass lamps can usually operate for at least one (1) year. We only sell hard glass lamps on this website.
If I Turn The UV Lamp Off While It Is Not In Use, Will It Last Longer?
No. It is NOT recommended to turn the UV light on and off. On and off cycling of a UV lamp that is designed to be left on at all times can cause premature lamp failure. On average the lamp can lose as much as six (6) hours of lamp life each time it is turned on and off.
Video courtesy of Viqua