How to Change a ClearRay Bulb

Need help changing the ClearRay™ bulb in your hot tub? We’re here to talk you through it.

Let’s start with the basics. If you want to jump straight to the instructions, click below.

How do I change a ClearRay™ bulb?

What is ClearRay™ on Jacuzzi?

ClearRay™ is a hot tub water purification system that uses ultraviolet light to disinfect your tub’s water, to stop the growth of bacteria and treat 99% of water borne pathogens. This reduces the amount of hot tub sanitiser you need, saving you money and giving you a crystal clear spa. The ClearRay™ Water Purification System was introduced in Jacuzzi® and Sundance hot tubs manufactured from 2012 onwards. 

Find out more in Jacuzzi's video below.

Do I need chlorine with ClearRay™?

Jacuzzi Chlorine granules

ClearRay® reduces the amount of sanitiser you need in your hot tub by up to 50%. It’s compatible with both chlorine and bromine sanitisers. We stock premium Jacuzzi chemicals for quality you can trust. 

How long does a ClearRay™ bulb last?

We recommend ClearRay™ UV-C bulbs are replaced every 12 months to maintain clean and safe hot tub water. The quartz tube that the bulb sits in needs cleaning annually, so it’s best to do this at the same time.


How will I know it’s time to change my ClearRay™ bulb?

Your hot tub’s control panel will display a ‘blb’ message when it’s time to change the bulb. Refer to your tub’s manual for instructions on how to reset this message once you’ve replaced the bulb.

Where can I buy a replacement ClearRay™ bulb?

Jacuzzi ClearRay

You can buy a replacement ClearRay bulb here. We also sell spare quartz tubes for the bulbs. Don’t forget, we offer free next working day delivery when you spend over £50*.

Where can I buy a replacement ClearRay™ unit?

ClearRay system

We also offer the complete ClearRay unit, choose from pre-2016 hot tubs and tubs from 2016 onwards. Shop our entire range of ClearRay spare parts

How do I change a ClearRay™ bulb?

We’ve put this guide together to talk you through how to change your ClearRay™ bulb. Or, you can have your ClearRay™ bulb changed by one of our skilled hot tub technicians during your annual hot tub service.

Step-by-step guide to changing your ClearRay™ bulb

  1. Turn off the hot tub breaker, and allow the bulb to cool completely.
  2. Drain the hot tub completely, as you’ll also need to clean the quartz tube.
  3. Locate the ClearRay™ system, you may have to remove panels to access it. Unfasten the four screws from the ClearRay™ system enclosure cover and gasket. This will expose the UV bulb and connections.
  4. Disconnect the bulb socket from the power cord socket.
  5. Slowly (and carefully) remove the bulb from the quartz tube.
  6. Remove the quartz seal compression nut by turning it anti-clockwise, use a pair of channel-lock pliers if needed. There’s a stainless-steel compression washer which slides over the quartz tube, save this for later.
  7. Next, use a paper towel or dry cotton cloth to wipe the quartz tube until clear. If needed, you can use a shower limescale cleaning product. Don’t use abrasive cleaners as they can scratch the quartz tube surface.
  8. Rinse the quartz tube with clean water to completely remove any cleaning products.
  9. Place the compression washer over the open end of the quartz tube.
  10. Reinstall and hand tighten the quartz seal compression nut by turning it clockwise.
  11. Refill your hot tub with water.
  12. System test 1: Ensure there’s no water dripping from the seal compression nut. If water is visible, stop and tighten the compression nut using a pair of channel lock pliers to a maximum of ¼ turn. If that does not fix the leak, then repeat the steps from step 1. Make sure there’s no water leaking before proceeding to step 13.
  13. System test 2: Turn the breaker back on and turn on the pump to circulate the water through the ClearRay™ system. Wait for 5 minutes and ensure no water is dripping. If water is visible, stop, fix the leak by repeating from step 1. Make sure there’s no water leaking before you proceed to step 14. Turn the pump and breaker OFF.
  14. Use the latex glove provided when handling the UV bulb and reconnect the UV bulb socket to the power cord socket. Do not touch the new UV bulb with your bare hands. Oil on your skin will cause hot spots on the UV bulb and shorten its lifespan.
  15. Carefully slide the new UV bulb back inside the quartz tube.
  16. Reinstall the black bulb boot over the quartz seal compression nut.
  17. Reinstall the enclosure cover with gasket and secure with the screws.
  18. Dispose of the old bulb safely and in accordance with local disposal laws, as the bulb contains mercury.
  19. Turn the power back on and check the ballast to see if the ClearRay™ system is functioning. A solid green light indicates that the ClearRay™ system has power and should always be on. A solid red light indicates that the UV-C bulb is fully installed and activated.
  20. Refer to your hot tub manual for instructions on how to reset the ClearRay™ timer.

Need some more assistance?

This step-by-step video will guide you through how to change your ClearRay™ bulb. Or, let us take care of it by booking your annual hot tub service.

*Free next working day delivery when you spend over £50 and order before 3pm Monday to Friday.

Parting advice

Need more advice? Give us a call on 01482 212322 or email and we’ll help you out. Or drop in and see us in our Hull or Leeds showrooms. 

Not near one of our Yorkshire hot tub showrooms? No problem, if you’re looking for a new hot tub you can explore our virtual showroom or book a video call with our showroom team.

Stay up to date with our latest products, hot tub guides and updates on Facebook or Instagram.

Older Post
Newer Post
Close (esc)


Use this popup to embed a mailing list sign up form. Alternatively use it as a simple call to action with a link to a product or a page.

Age verification

By clicking enter you are verifying that you are old enough to consume alcohol.

Shopping Basket

Your basket is currently empty.
Shop now