Pentair Junction Box Brass Base w/ Polycarbonate Cover | 78310700
Pentair
SKU: PEN78310700
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.
Hours Of Operation:
Monday - Friday: 8:00 am to 4:00 pm Phoenix Time
Saturday and Sunday: Closed
- Orders costing more than $300 WILL be required to have signature confirmation upon delivery.
- Handling time is typically only 1 day.
- Any item ordered after 1pm Phoenix time, may not ship same-day.
- Call us if you require expedited shipping and we can give you quotes based on your needs.
Return Policy:
- All products, except as noted below, are eligible for return up to 30 days after receipt of item.
- For returns, an RMA form must be filled out HERE or customers can call for additional help.
- Shipping costs will be deducted from all returned items.
- Any item that is missing accessories, original packaging, or is not returned in the same condition that it was received in, may be subject to a re-stocking fee up to 100% based on the condition we receive it in.
- Items broken, damaged, or inoperable due to installer error will not be refunded.
- Fill out the return form or give us a call to obtain an RMA and return shipping label.
- There are no returns on the Pentair Colorsync 618031
- No returns on pool cleaners.
- No returns on opened seals and o-rings.
- No returns on capacitors.
- If a light is returned because it "doesn't work" and it tests fine, the cost to ship and a re-stocking fee will be deducted from the refund.
- All products denied upon arrival at customers house WILL be charged the cost to ship.
- Visa Gift Card Promotions: Gift cards are sent within 14 days of the order. When accepting the Visa Gift card, you agree that if your order is returned or refunded, this amount will be deducted from the refunded amount. All Visa Gift cards are sent via email in an E-Gift Card format and are non refundable.
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