Pentair AquaLumin III Nichless Light Vinyl Mounting Bracket Assembly, 3/4" | 78887700
Pentair
SKU: 78887700
Pentair AquaLumin III Vinyl Liner Mounting Bracket, 3/4" Hub | 78887700
The Pentair 78887700 is a vinyl liner mounting bracket for the Pentair AquaLumin III nicheless pool and spa light. It provides the proper mounting interface through a vinyl liner wall and includes a 3/4" hub connection point for the light’s conduit/cord routing.
Key Features
- Designed for vinyl liner pools/spas using Pentair AquaLumin III nicheless lights.
- 3/4" hub connection for conduit/installation routing.
- New-installation hardware component (commonly specified when installing or converting an AquaLumin III light in a vinyl application).
- OEM Pentair replacement part for correct fit and alignment.
Compatibility
- Fits: Pentair AquaLumin III nicheless pool & spa lights (vinyl liner installations)
- Tip: If you are replacing an existing bracket, confirm the hub size and the light model to match your current setup.
Specifications
- Brand: Pentair
- Part Number: 78887700
- Part Type: Vinyl liner mounting bracket
- Hub Size: 3/4"
- Catalog Reference (common): 3626-25
- Quantity: Sold individually
Common Reasons to Replace
- Bracket is cracked, warped, or damaged from impact or freeze conditions
- Conduit/hub area is stripped or no longer seals properly
- Light is being reinstalled during a liner replacement and the bracket is worn or corroded
- Converting/adding an AquaLumin III light to a vinyl liner wall application
Installation Notes
- Follow the AquaLumin III installation instructions for correct placement, sealing surfaces, and liner cutout alignment.
- Confirm the hub/conduit routing is properly supported and watertight per code and manufacturer guidance.
- Use care when tightening fasteners on vinyl applications to avoid distorting the liner or bracket mating surfaces.
- Underwater lighting work should be performed by a qualified pool professional/electrician as required by local code.
Related Products
- Search Aqua Pool Supply for 78887700
- Pentair AquaLumin III lights & parts
- Pool light gaskets
- Light conduit & electrical fittings
Maintenance Tips
- When servicing underwater lights, inspect sealing surfaces and replace worn gaskets to reduce the risk of moisture intrusion.
- Keep chemical levels balanced—highly aggressive water can accelerate corrosion and degrade plastic components over time.
- If you see recurring moisture/fogging or leaking around the light area, stop use and inspect the mounting/sealing stack immediately.
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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