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TAYMAC CP475S Weatherproof Cast Metal Closure Plug, 3/4 in. NPT, Gray
The TAYMAC CP475S Weatherproof Metal Closure Plug is engineered to seal unused 3/4 in. NPT openings on weatherproof electrical boxes and device covers. Molded from cast metal and finished in Gray to coordinate with standard weatherproof enclosures, this closure plug is UL Listed and supplied as a convenient polybag of 4, making it easy for electrical contractors, facility maintenance teams, and remodelers to keep unused conduit hubs protected from moisture, dust, insects, and debris. Whether closing out an extra knockout on a weatherproof cover or finishing an outdoor device box, the CP475S delivers a secure, low-profile seal that holds up to everyday job-site conditions.
Key Features
- Trade Size: 3/4 in. NPT threaded closure plug sized to fit standard weatherproof device box and cover openings.
- Durable Construction: Cast metal body provides a rugged, long-lasting seal for unused conduit hubs.
- Gray Finish: Coordinates with common weatherproof covers and enclosures for a clean, uniform appearance.
- Low-Profile Design: 0.31 in. depth keeps the plug flush and unobtrusive once installed.
- Convenient Packaging: Supplied in a polybag of 4 plugs for efficient job-site stocking and multi-opening installations.
- Threaded NPT Connection: Simple, secure thread-in installation into 3/4 in. NPT hubs without special tools.
- UL Listed: Independently verified for safe use in weatherproof electrical closure applications.
Certifications & Compliance
- UL Listed
Technical Specifications
- Product Material: Cast Metal
- Product Color: Gray
- Product Depth: 0.31 in
- Certified Listed: UL Listed
Typical Applications
- Sealing Unused 3/4 in. NPT Conduit Openings
- Weatherproof Device Box and Cover Assemblies
- Outdoor and Wet-Location Electrical Installations
- Commercial and Industrial Conduit Systems
- Renovation and New Construction Wiring Projects
Why TAYMAC?
TAYMAC builds weatherproof electrical devices from durable cast metal construction designed to withstand outdoor exposure, moisture, and everyday job-site handling. The CP475S closure plug's UL Listed rating, rugged 3/4 in. NPT fit, and low-profile 0.31 in. depth make it a dependable choice for electricians and facility teams who need a reliable, code-compliant way to seal unused conduit hubs on weatherproof boxes and covers. Packaged as a polybag of 4 in a matching Gray finish, the CP475S is a practical solution for finishing out weatherproof electrical installations with confidence.
Manufacturer Resources
Product Specs
- Product Depth:
- 0.31 in
- Certified Listed:
- UL Listed
- Product Material:
- Cast Metal
- list_batch:
- TAYM-20260916
- Product Color:
- Gray
- Product Type:
- Closure Plug
- Department:
- Electrical
- Product Subgroup:
- Weatherproof Covers
- Product Group:
- Wiring Devices
TAYMAC CP450S – Frequently Asked Questions
1) What trade sizes does the TayMac closure plug come in?
Two NPT trade sizes: 1/2 inch (CP450S) and 3/4 inch (CP475S). Both are the same cast metal gray plug, so pick the one matching the hub or knockout you are closing off. If you have a mix of hub sizes on one enclosure, you'll need both part numbers.
2) Will a 3/4 inch NPT closure plug thread into a 1/2 inch knockout on my weatherproof box?
No. The CP475S is cut for 3/4 inch NPT threads and will not engage a 1/2 inch hub. For a 1/2 inch opening order the CP450S. NPT threads are size specific, so there is no reducing built into the plug itself.
3) Do I need a plug or a sealing fitting for an unused opening on an outdoor device cover?
For a threaded NPT hub you are not using, a closure plug is the right part: it threads in and seals the opening against moisture, dust, insects, and debris. A reducing washer or bushing only changes the opening size for a cable or conduit entry, so it does not close it out. The TayMac plugs are made for weatherproof device box and cover assemblies in outdoor and wet-location work.
4) What other brand of weatherproof closure plug could I use instead of TayMac?
Pass & Seymour's WPBP Series weatherproof closure plug is the other gray closure plug we carry for the same job. Go with whichever matches the brand of enclosure or cover already on the building if you want the finishes to read the same across openings.
5) Is the Pass & Seymour WPBP closure plug an equivalent to the TayMac CP450S/CP475S?
Both are weatherproof closure plugs in a gray finish used to seal unused openings on weatherproof boxes and covers, so they serve the same purpose. The difference to confirm before ordering is construction and thread size: the TayMac plugs are cast metal, gray, and come in 1/2 in. and 3/4 in. NPT trade sizes with a 0.31 in. depth, and they are UL Listed. The Pass & Seymour part is identified by its WPBP series, so match the series number to the trade size of the hub you are closing.
6) We standardize on Pass & Seymour weatherproof covers - will a TayMac closure plug still match?
Yes, from a fit standpoint. The CP450S and CP475S thread into 1/2 in. and 3/4 in. NPT hubs, which is a standard thread, so they will seat in any weatherproof box or cover with matching NPT openings regardless of the cover brand. Cosmetically, the TayMac plugs are gray, the same family of finish as the Pass & Seymour WPBP closure plug, and the 0.31 in. depth keeps them close to flush.
7) How far does the TayMac closure plug stick out of the cover?
Depth is 0.31 inch, so the plug sits nearly flush with the enclosure face. That matters where a cover plate, in-use lid, or adjacent conduit body would foul anything standing proud of the surface.
8) Is a metal closure plug better than a plastic one for an outdoor box?
The TayMac plug body is cast metal rather than molded plastic, which stands up to sun exposure and job-site handling and keeps the thread engagement solid in a metal hub. Gray finish is matched to common weatherproof covers so a closed-out opening does not stand out on the elevation.
9) How many plugs come in a pack of the TayMac closure plug?
Supplied as a polybag of 4. Useful if you are closing several knockouts on one enclosure or stocking a service truck, since most jobs turn up more than one unused hub.
10) Do I need special tools to install a TayMac closure plug?
No. It threads straight into the NPT hub by hand and snugs down, no knockout punch or sealing kit required. One plug per opening.
How fast can I get the TAYMAC CP450S delivered?
Most orders ship the same day from our distribution partners, with quick delivery throughout the
continental
U.S.
Need it urgently? Contact Us for expedited shipping options.
Can I return it if it doesn’t work for me?
Yes—ZenSupply offers a hassle-free return policy. If the product isn’t the right fit,
reach out to our support team for a return authorization or setup a return by following our return instructions.
Does the TAYMAC CP450S come with a warranty?
Absolutely. The TAYMAC CP450S is backed by a manufacturer’s warranty.
For full warranty terms, check the product documentation or Contact Us.
How do I get technical support or installation help for the TAYMAC CP450S?
You can call, text, or email our expert support team for fast answers. We’re here to help with
product
selection,
installation tips, and troubleshooting. Contact Us
Why buy the TAYMAC CP450S from ZenSupply?
ZenSupply makes it easy to get the commercial door hardware you need—fast shipping, expert support,
and
rewards on
every order.
Our team is always ready to help you choose the right product for your project.