Pentair Junction Box Brass Base w/ Polycarbonate Cover, (3) - 1/2 in. ports | 78310500
Pentair
SKU: 78310500
Pentair Pool & Spa Light Junction Box, Brass Base w/ Polycarbonate Cover (3) 1/2" Ports | 78310500
The Pentair 78310500 is a heavy-duty pool/spa light junction box designed for making secure, code-compliant electrical connections for underwater pool and spa lighting. It features a brass base with a durable polycarbonate cover and includes (3) 1/2" conduit ports for flexible wiring and conduit routing.
Key Features
- (3) 1/2" ports: supports multiple conduit entries for light cord, line feed, and bonding/grounding routes (installation dependent).
- Brass base: corrosion-resistant foundation for long-term outdoor pool pad environments.
- Polycarbonate cover: impact-resistant cover helps protect internal connections from weather and debris.
- Built-in strain relief: helps secure the light cord and reduce stress on electrical connections.
- UL listed: intended for use in pool/spa lighting junction box applications (follow local codes).
- Serviceable design: allows future access for inspection, re-termination, and lighting service.
Common Applications
- Underwater pool and spa lights (junction point between the light cord and the supply wiring)
- New pool construction or remodel lighting upgrades
- Replacing a cracked, corroded, water-intruded, or non-code junction box
Specifications
- Brand: Pentair
- Part Number: 78310500
- Junction Box Type: Pool/spa light junction box
- Base Material: Brass
- Cover Material: Polycarbonate
- Ports: (3) x 1/2"
- Quantity: Sold individually
Installation Notes
- Pool and spa electrical work should be performed by a qualified electrician and must follow all applicable local codes.
- Confirm your conduit size and layout: this model uses 1/2" ports (other versions are available for different port sizes).
- Ensure proper bonding/grounding per code and manufacturer requirements for the light and transformer (if used).
- Keep the junction box accessible for future service and inspections.
Related Products
- Pool light junction boxes
- Pool light gaskets
- Pool light face rings & trim
- 1/2" conduit fittings for pool lights
- Pool light transformers
- Outdoor-rated wire connectors
Maintenance Tips
- Periodically inspect the cover and gasket/sealing surfaces for cracks or gaps that could allow water intrusion.
- If you notice corrosion, moisture, or flickering lights, shut off power and have the junction box inspected immediately.
- Keep the box area clear of mulch and standing water to reduce corrosion and improve service access.
- Any time a light is serviced, confirm strain relief is secure and wiring terminations are clean and tight.
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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