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PVC Junction Box · 4 x 4 x 4 in · Gasketed PVC Enclosure · Westlake Pipe & Fittings RJB444
SKU: RJB444
4 x 4 x 4 in PVC junction box with gasketed cover, threaded brass inserts, and approximately 47.5 cu in internal volume for rigid PVC conduit runs. Suitable for indoor or outdoor use where a non-metallic enclosure is needed for moisture, dust, or corrosive conditions.
What this product is for
This 4 x 4 x 4 in (102 x 102 x 102 mm) gasketed PVC junction box is used to join conductors, make splices, and provide an accessible pull or transition point in rigid PVC conduit systems. It is commonly selected where a non-metallic enclosure is preferred for wet, dusty, or corrosive environments.
Use for
- Rigid PVC conduit runs in indoor or outdoor installations
- Washdown, damp, or corrosive areas where PVC is preferred over metal
- Lighting, controls, branch circuit junctions, and equipment terminations
- Commercial, industrial, agricultural, and residential service areas
Avoid for
- Applications requiring a metallic box for bonding or shielding
- Installations where box fill or conductor bending space exceeds the available interior volume
- Direct use with incompatible fittings or entries that cannot maintain the enclosure seal
Best for
Best for electricians needing a compact non-metallic junction box with a gasketed cover and brass threaded inserts for rigid PVC conduit systems. It is a practical choice when corrosion resistance and weather resistance matter more than metallic construction.
Installed in
Typically installed on exterior walls, service areas, utility rooms, agricultural buildings, mechanical spaces, and industrial process areas. Commonly mounted anywhere conduit splices or pull points need to remain accessible.
Why this product exists
PVC junction boxes like this one provide a corrosion-resistant alternative to metal enclosures while maintaining a sealed wiring space for conduit systems. The gasketed cover helps protect connections from moisture and dust, and the threaded brass inserts support repeated cover removal during service.
Compared with similar products
Compared with standard non-gasketed boxes, this style is better suited to wet or dirty locations. Compared with metal junction boxes, PVC will not rust and is commonly chosen for corrosive environments. A typical buying check is internal space: this model offers approximately 47.5 cu in, so confirm conductor count, splices, and fittings before ordering.
Rule of thumb: use a larger enclosure when multiple conduit entries or heavier conductor splices are expected. Actual fit depends on conductor size, splice method, fittings, and local electrical code.
Specifications
- Product type: PVC junction box with gasketed cover
- Manufacturer part number: RJB444
- Nominal size: 4 x 4 x 4 in (102 x 102 x 102 mm)
- Internal volume: approximately 47.5 cu in
- Material: PVC
- Colour: Grey
- Cover: Gasketed
- Threaded inserts: Brass
- Typical use with: Rigid PVC conduit
- Enclosure ratings listed in source material: NEMA 1, 2, 3, 4, 4X, 12, 13
- Approvals listed in source material: UL, CSA
- Country context: Made in Canada listing indicated in source catalogue context
Minimum Order $20
We accept the following payment methods:
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Standard Shipping-Free on orders over $500 in Metropolitan Areas / Subject to $750 in Rural Areas.
Minimum Order Is $20
Freight Surcharge Apply To Oversized/Over-Weight Items(Not Limited To):
- PVC and EMT Pipe
- Wire and Cable
- Items over 48 inches in length
Surcharges are applied to items on an individual basis regardless if the rest of the order meets prepaid levels. If a freight line appears at the time of check out it only applies to the Items carrying a surcharge and not the entire basket of goods.
Shipping Options:
- A courier can deliver to your home, office, or your job site
- Pick up at local depot near you (applies to the following locations)
Edmonton Warehouse 8135 Roper Rd Edmonton, T6E 6S4, AB
Orders are typically delivered within two to eleven business days. The transit time begins the first full shipping day after your order leaves our warehouse. Please allow an additional 2-5 days for delivery to remote locations, additional fees may apply.
THE FOLLOWING APPLIES TO STANDARD SHIPPING OPTIONS
- We cannot deliver to P.O. boxes.
- A signature may be required for shipments over $500.
- No weekend delivery.
- Wire & cable, EMT or PVC conduit, tube lamps 4ft or greater, and 10ft ground rods & mast pipes have special conditions.
Standard Shipping cost on orders less than $499
Total shipping cost = "Per Shipment" cost + "Per Item" cost. The "per item" cost is listed in terms of price per pound.
Product Group | Per Shipment* | Per Item |
|---|---|---|
Boxes | $6.99 | $1.49/lb |
Conduit & Raceway | $149.99 | $2.49/lb |
Connectors & Fittings | $5.99 | $1.19/lb |
Data & Structured Home | $5.99 | $1.19/lb |
Distribution Equipment | $5.99 | $1.19/lb |
Emergency Lighting | $6.99 | $1.49/lb |
Heating & Ventilation | $6.99 | $1.49/lb |
Lighting Controls | $5.99 | $1.19/lb |
Lighting Indoor | $6.99 | $1.49/lb |
Lighting Outdoor | $6.99 | $1.49/lb |
Tools | $4.99 | $.99/lb |
Wire & Cable | $49.99 | $2.29/lb |
Wiring Devices | $5.99 | $1.19/lb |
Any combination of the above items | Highest applicable per-shipment charge | As above |
Effective Date: August, 15, 1998(Updated August 2026)
At Evolt Electrical Supply, customer satisfaction is our top priority. Please review our return policy below:
Returns
Defective Items:
- If you receive a defective item, you may return it for a replacement or refund within 30 days of purchase.
- To initiate a return, please contact our customer service team with your order number and a description of the defect.
Non-Defective Items:
- We do not accept returns for non-defective items. All sales are final once the product is shipped or ordered from the manufacturer. In certain circumstances we may amend this so feel free to contact our customer service team.
Return Process
Authorization:
- Before returning any items, you must obtain a Return Merchandise Authorization (RMA) number from our customer service team. Returns without an RMA number will not be accepted.
- Backordered items can not be cancelled if the item is in transit from the manufacturer, contact us to review.
Shipping:
- Customers are responsible for the return shipping costs. We recommend using a trackable shipping service or purchasing shipping insurance.
Condition:
- Returned items must be in their original packaging and condition. Any items returned damaged due to improper packaging or misuse will not be eligible for a refund or replacement.
Refunds
- Once we receive and inspect your returned item, we will notify you of the approval or rejection of your refund.
- Approved refunds will be processed within [7] business days and a credit will automatically be applied to your original method of payment.
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