Pentair BioShield UV Disinfection Sterilizer 120W UV Lamp | 523037
Pentair
SKU: 523037
Pentair BioShield UV Replacement Lamp, 120 Watt | 523037
The Pentair 523037 is a genuine 120-watt UV replacement lamp for select Pentair BioShield UV disinfection systems. This lamp is a routine service item that restores UV output for proper water disinfection performance when the existing lamp has reached end of life or is no longer producing the required intensity.
Key Features
- 120W UV lamp designed for BioShield UV units that specify part 523037.
- Annual service item: commonly listed as a required periodic replacement component for BioShield UV systems.
- Restores UV performance to help maintain effective disinfection when the old lamp is aged or failed.
- OEM Pentair part for correct fit and electrical connection in the matching BioShield chamber assembly.
Compatibility
- Fits: Pentair BioShield UV System model 522637 (where parts diagram specifies 523037)
- Tip: Verify your BioShield model number and parts list before ordering. BioShield systems use different lamp wattages by model.
Specifications
- Brand: Pentair
- Part Number: 523037
- Part Type: UV replacement lamp
- Wattage: 120 Watt
- Quantity: Sold individually
Common Reasons to Replace
- Scheduled UV lamp change to maintain consistent UV output
- UV system alarm or reduced performance due to lamp age
- Lamp will not ignite or operates intermittently
- Physical damage during service (chips, cracks, broken pins)
Installation Notes
- Turn off power to the UV system and follow all lockout/tagout and safety procedures.
- Allow the unit to cool before servicing.
- Handle the lamp carefully; avoid touching the glass with bare hands (use clean gloves). Oils can shorten lamp life.
- Inspect the quartz sleeve for scale, clouding, or damage while the unit is open and replace/clean as needed.
- After replacement, verify the unit starts normally and there are no leaks at service seals or unions.
- UV system service should be performed by a qualified pool professional/technician.
Related Products
- Search Aqua Pool Supply for 523037
- BioShield Quartz Sleeve (for 522637) - 523041
- BioShield 4-Pin Lamp Connector - 523034
- BioShield Lamp Spacer - 523423
- BioShield Retaining Nut - 411000
- Pentair BioShield UV parts
Maintenance Tips
- Replace the UV lamp on schedule to maintain disinfection intensity (UV output drops over time even if the lamp still lights).
- Keep water chemistry balanced and control scale—mineral buildup on the quartz sleeve reduces UV transmission.
- During lamp service, inspect O-rings/seals and replace worn seals to prevent leaks.
- Record the install date so future service intervals are easy to track.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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