Pentair Junction Box Brass Base w/ Polycarbonate Cover | 78310700
Pentair
SKU: 78310700
Pentair 78310700 – Pool Light / Spa Light Junction Box (Polycarbonate Cover & Brass Base)
The Pentair 78310700 is a junction box designed for pool and spa lighting systems. It provides a waterproof, code-compliant enclosure where low-voltage wires from underwater lights are connected to the main power supply — making it an essential component for safe, reliable pool lighting installations or repairs.
Key Features
- Durable brass base and UV-resistant polycarbonate cover — built for long-term exposure to pool chemicals, water spray, and sunlight.
- Port configuration: ¾″ × 1″ × ¾″ inlets / outlets — fits standard conduit and flexible conduit fittings used in pool / spa light wiring.
- Comes with gasket, cover-screws, and built-in strain relief — ensures a watertight, electrically safe seal.
- Meets electrical-safety standards for pool lighting enclosures (suitable for installations requiring compliance with pool & spa wiring codes).
- Compact and weather-tight — ideal for retrofit jobs or replacing aging junction boxes during pool remodels or light upgrades.
Specifications
- Manufacturer: Pentair Pool & Spa
- Part Number: 78310700
- Type: Light junction box (for pool / spa underwater light wiring)
- Base Material: Brass (corrosion-resistant)
- Cover Material: Black polycarbonate (UV- and chemical-resistant)
- Ports: ¾″ × 1″ × ¾″ conduit ports
- Includes: Brass base, polycarbonate cover, gasket, cover screws, internal strain-relief fittings
- Typical Dimensions: ~6″ × 4″ × 4″ (box size) — suitable for most pool light wiring runs and splices
When & Why to Use
Use the 78310700 junction box when installing new underwater pool lights, replacing a cracked or leaking existing light junction box, or upgrading old components to meet current safety standards. A proper junction box helps protect wiring from water intrusion, keeps connections dry, and reduces the risk of electrical hazards — essential for pool-side lighting reliability and safety compliance.
Installation & Maintenance Tips
- Always de-energize and lock out power before servicing or installing the junction box.
- Use conduit fittings and PVC or flexible conduit appropriate for pool-side exposure; tighten ports with approved fittings to maintain waterproof seal.
- Ensure the cover gasket is clean and properly seated before tightening cover screws — replace gasket if cracked or degraded.
- Inspect box periodically for corrosion, cracking, or water intrusion — especially before pool opening or after winter. Replace if any part shows signs of deterioration.
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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