Pentair Junction Box Brass Base w/ Polycarbonate Cover - (3) - 3/4 in. ports | 78310600
Pentair
SKU: 78310600
Pentair 78310600 – Junction Box with Cover (3× ¾″ Ports)
Product Overview
The Pentair 78310600 is a durable electrical junction box designed for pool and spa lighting systems. It features a brass base, polycarbonate cover, and three ¾-inch entry ports—making it suitable for wiring connections in aquatic environments.
Key Features
- Brass base offers corrosion resistance and long service life.
- Polycarbonate cover provides weather-proof protection for electrical connections.
- Three ¾″ ports allow flexible conduit wiring and multiple connections.
- UL-listed and suitable for residential pool/spa lighting system installations.
Technical Specifications
- Part Number: 78310600
- Port Size: (3) ¾″ NPT entries
- Base Material: Brass
- Cover Material: Polycarbonate
- Intended Use: Electrical junction box for pool and spa lighting wiring
Applications & Compatibility
This junction box is ideal for the equipment pad or lighting panel where underwater lights or pool/spa electrical systems require a secure, corrosion-resistant enclosure. It is commonly used alongside Pentair lighting products and accessories. Confirm that your lighting or control system calls for a ¾″ conduit-ready junction box with three entry ports before selecting.
Installation Instructions
- Turn off all power to the pool equipment and lock out the circuit prior to installation.
- Mount the junction box on a stable surface near the light fixture disconnect or wiring route.
- Run conduit or cable through the ¾″ ports and secure connections using appropriate strain relief bushings.
- Connect wires in accordance with local electrical code, sealing around conduits to prevent moisture ingress.
- Replace the polycarbonate cover and restore power; test the lighting circuit for proper operation.
Troubleshooting
- No light or power to fixture: Verify that wiring enters correctly, circuit breaker is on, and connections in the junction box are secure.
- Corrosion inside box: Ensure proper sealing of cover and conduit, check for water intrusion, and replace damaged gaskets as needed.
- Loose conduit or wires: Confirm that strain reliefs are installed and cables are secured; re-tighten if necessary.
Maintenance Tip
Inspect the junction box annually for signs of moisture ingress, corrosion, or damaged conduit connections. Keeping the cover tight and entries sealed will prolong the life of the electrical connections and prevent lighting failures in pool or spa systems.
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.
Related Products
