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PVC Old work Box extender Electrical Box

Ratings & Reviews for CANTEX PVC Old work Box extender Electrical Box

4.3
143
Review
 4.3 out of 5
143 Reviews


79% Recommend this product

Ratings may include incentivized customer reviews.

What Customers Are Saying

Customers overwhelmingly praise this electrical box extender for reliably bringing outlets flush with new wall surfaces after renovations like shiplap, tile, or cabinetry installations. Most highlight straightforward installation and appreciate its ability to meet electrical code requirements for safety and non-flammable coverage. The design accommodates varied wall thicknesses effectively. However, several note the included screws run too short to secure the extender properly, requiring separate purchases. Despite this frustration, most customers find it performs exactly as needed for retrofit scenarios.

Customer review summary generated by AI, including incentivized reviews.
143 Customer Reviews

Expensive

Way to expensive

February 27, 2025
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Include the proper length screws!

Would Not Recommend

It's a nearly $6 (Jan 2025) specialty piece of plastic, so it better be ready to perform the convenience charge function without disruption. The included screws are too short. If it sits flush on the existing single gang box, the included screw should be LONGER than the depth of the box to secure outlet and extender. Why is that difficult for the engineering/manufacturing team to understand?!

January 29, 2025
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Good extender.

Would Recommend

It fits like a glove in the outlet.

January 3, 2025
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It went up fairly quickly, easily and looks good.

October 22, 2024
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The work but seem priced a little high.

Would Recommend

These extender boxes worked great. Most of my existing back boxes for the light switches and electrical outlets are too short in that they are not flush with the face of the wall. Probably due to the wall having double sheet rock. So the edge of the box is about 5/8" shy of the face of the wall. I bought 3 of these extender boxes and they worked to add the extra 5/8" I needed. These extenders won't add more than about 1" of depth to your box, so they won't work if you need more than that. Also, ...

September 25, 2024
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Buy again

Would Recommend

Perfect for my home project. Would buy again

August 27, 2024
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Not a true box extension…

I have worked with better box extensions… this is just as re-purposed LV-1 and required modifications to actually “work” with an installed rework box (buried behind added siding). Not to mention the included screws aren’t long enough to be useful so I had to supply my own longer screws.

July 15, 2024
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Code said I needed these cheaply made trinkets.

Would Not Recommend

Sooooo expensive for something so cheap.

May 18, 2024
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Perfect after installing backsplash

Worked as advertised!

April 16, 2024
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Same

Would Not Recommend

Tabs are way too small

April 12, 2024
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Great fit

Would Recommend

Unlike some other extenders, this one will extend a good inch past the old box. I needed 3/4” past my old box to allow for the new lumber wall covering that we added. This extender fit and works great. No gaps or open edges. Very easy to use.

March 22, 2024
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