Von Duprin 051808 Adjustable E...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$44.00
$43.92
Von Duprin 051808 Adjustable Extension Rod Kit for 33/35/48 Series Exit Devices, 8' 4" to 10"

Von Duprin 051808 Adjustable Extension Rod Kit for 33/35/48 Series Exit Devices, 8' 4" to 10"

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Model: 51808
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Von Duprin 051808 Adjustable Extension Rod Kit for 33/35/48 Series Exit Devices, 8' 4" to 10"

Commercial-Grade Adjustable Top Rod Accessory for Vertical Rod Exit Devices

The Von Duprin 051808 is an adjustable extension rod kit designed for use with compatible 33/35/48 Series exit devices. This commercial-grade installation accessory provides an adjustable rod length range of 8' 4" to 10", making it suitable for a variety of door height configurations in demanding commercial applications. Classified as a Grade 1 component, this kit is engineered to integrate seamlessly with Von Duprin's 33/35/48 Series vertical rod exit device systems.

Professional Features & Benefits

  • Adjustable Length Range: Accommodates door height configurations from 8' 4" to 10", providing flexible installation options across a variety of commercial door openings.
  • Series Compatibility: Designed specifically for use with Von Duprin 33/35/48 Series exit devices, ensuring reliable integration with existing hardware systems.
  • Grade 1 Rated: Meets Grade 1 standards for commercial door hardware, delivering the durability and performance required in high-traffic environments.
  • Commercial-Grade Construction: Engineered for commercial applications where consistent, dependable operation is essential.
  • Installation Accessory Classification: Categorized as an installation accessory within the Exit Devices Parts product type, simplifying procurement and compatibility verification.
  • Parts and Accessories Integration: Designed to complement and extend the functionality of compatible Von Duprin vertical rod exit device assemblies.

Technical Specifications

  • Product Group: Exit Devices and Trim
  • Series: 33/35/48 Series
  • Grade: Grade 1
  • Product Subgroup: Parts and Accessories
  • Subcategory: Parts and Accessories
  • Product Type: Exit Devices Parts
  • Commercial/Residential: Commercial
  • Parts and Accessories Type: Installation Accessories
  • Product Attribute: Parts and Accessories
  • Fire Rating: No
  • Product Category: Exit Devices and Trim
  • Department: Door Hardware

Professional Applications

  • Commercial Office Buildings
  • Educational Facilities
  • Healthcare Institutions
  • Retail Establishments
  • Industrial and Warehouse Facilities
  • Multi-Tenant Residential Properties
  • Government and Municipal Buildings

Why Choose Von Duprin Quality?

Von Duprin exit device parts and accessories are built to Grade 1 commercial standards, ensuring reliable performance in the most demanding door hardware applications. The 051808 extension rod kit is engineered for precise compatibility with the 33/35/48 Series exit device platform, providing installers and facility managers with confidence in every installation. Dependable Von Duprin quality means long-term performance in high-traffic commercial environments.

Manufacturer Resources

Von Duprin 78/75 Series Catalog

Product Specs

Product Group:
Exit Devices and Trim
Series:
33/35/48 Series
Grade:
Grade 1
Product Subgroup:
Parts and Accessories
Subcategory:
Parts and Accessories
Product Type:
Exit Devices Parts
Commercial/Residential:
Commercial
Parts and Accessories Type:
Installation Accessories
Product Attribute:
Parts and Accessories
Fire Rating:
No
Product Category:
Exit Devices and Trim
Department:
Door Hardware

Von Duprin 51808 – Frequently Asked Questions

1) What does the Von Duprin 051808 extension rod kit actually do, and do I need one?
The 051808 is an adjustable top rod kit for Von Duprin 33, 35 and 48 Series vertical rod exit devices. A standard vertical rod device is built for a normal-height opening; on a taller door the factory rod does not reach the top latch. The 051808 covers an adjustable range of 8 ft 4 in to 10 ft, so it is the part you order when the door is taller than what the device shipped for. If your opening is a standard 7 ft door, you do not need it.
2) Will the Von Duprin 051808 rod kit fit my 98/99 Series or 33A/35A exit device?
The 051808 is specified for the Von Duprin 33, 35 and 48 Series vertical rod devices, and that is the only compatibility carried for it. Rod kits are cut and drilled to the specific device platform, so a rod for one series is not a drop-in on another. If your device is a different Von Duprin family, order the extension rod listed for that family rather than this one.
3) Can I use the Von Duprin 051808 extension rod on a fire rated door assembly?
No. The 051808 extension rod kit carries a fire rating of No, so it should not be used to make up a fire rated exit device assembly. Fire exit hardware has to be listed as a complete assembly, and substituting an unlisted rod voids that listing. For a labeled opening, specify the fire rated rod component listed for your device.
4) My tall door has a surface vertical rod exit device that won't latch at the top. Is an extension rod the fix?
If the door is over 8 ft and the device is a Von Duprin 33, 35 or 48 Series, yes, the 051808 adjustable top rod is the part for it. Standard rods run out of length on tall openings and the top latch never engages the strike. Because the kit adjusts across 8 ft 4 in to 10 ft, one part covers a range of door heights rather than requiring a cut-to-length order. If the door is standard height and still won't latch, the problem is rod adjustment or top strike alignment, not rod length.
5) What is the difference between the Von Duprin 051808 extension rod kit and the Falcon 610061 top rod?
Both are top rod components for vertical rod exit devices, but they belong to different device platforms and are not interchangeable. The Von Duprin 051808 is an adjustable extension rod kit for the 33/35/48 Series exit devices, adjusting to cover door heights from 8 feet 4 inches up to 10 feet. The Falcon 610061 is a 24 Series Monarch concealed vertical top rod built for the F-25-C and F-25-CWDC exit devices. Match the rod to the device chassis already on the door: a 33/35/48 Series device takes the Von Duprin part, a Falcon F-25-C or F-25-CWDC concealed vertical rod device takes the Falcon part.
6) I have a tall pair of doors that keeps failing at the top latch. Do I need an extension rod kit or a replacement latch?
Those are two different repairs. An extension rod kit like the Von Duprin 051808 is what you order when the door is taller than the standard rod covers - it adjusts across the 8 feet 4 inch to 10 inch range for 33/35/48 Series vertical rod devices, so the existing top latch can reach and engage the head strike. If the rod length is already correct and the latch bolt itself is worn or damaged, the repair is a top latch component instead: Accentra publishes top latch replacement components for its 7110 and 7120 devices under 60-7010-0049-999, and for the fire-rated 7110F under 60-7010-0050-999. Diagnose by checking whether the rod reaches the strike before you order either.
7) Can I use an extension rod kit on a fire-rated opening?
The Von Duprin 051808 adjustable extension rod kit carries a fire rating of No, so specify it for openings where no fire label is required. When the opening is labeled, the components on the door have to be fire-rated as a system - Accentra, for example, splits its top latch parts into a non-rated component for the 7110 and 7120 at 60-7010-0049-999 and a separate part for the fire-rated 7110F at 60-7010-0050-999. Institutional and MRO buyers standardizing a facility should sort the labeled openings from the unlabeled ones before setting a part number for either.
8) Is the Von Duprin 051808 rod kit heavy duty enough for a school or hospital entrance?
It is a Grade 1 commercial component, which is the highest ANSI/BHMA durability class for door hardware and the one specified for high traffic institutional openings. Schools, healthcare corridors, government buildings and warehouse doors are exactly the applications it is built for. The one limit to watch is that it is not fire rated, so on a labeled cross-corridor door you need a fire rated rod instead.
9) Do I need anything besides the 051808 rod kit to finish a tall door exit device install?
The 051808 covers the top rod length only. On a taller opening you also need the top latch and strike set high enough in the frame to meet it, and on a pair of doors without a mullion both leaves need their own rod arrangement. ZenSupply carries related exit device parts across brands, including the Falcon 610061 concealed vertical top rod for 24 Series Monarch F-25-C devices and the Falcon 4023 steel mullion for double door applications if your opening is a pair using rim devices instead.
10) Should I use a vertical rod device with an extension rod on my pair of doors, or a rim device with a mullion?
Two different approaches. Vertical rod hardware latches at the head and the sill, so a pair swings free with no center post, which is what you want when you have to move carts, beds or freight through the opening. That is the setup the 051808 extends for tall doors on the Von Duprin 33, 35 and 48 Series. A rim device with a removable mullion, such as the Falcon 4023 steel mullion, puts a post in the middle of the opening but uses simpler hardware with no rods to adjust. Choose rods for clear opening width, mullion for lower maintenance.
11) Do I have to order a left hand or right hand version of the Von Duprin 051808 extension rod?
No handing to specify. The 051808 ships as a single model with no handed options, so one part number covers the opening regardless of swing. What you do need to confirm before ordering is that the device is a Von Duprin 33, 35 or 48 Series and that the door height falls in the 8 ft 4 in to 10 ft range.
12) Instead of running vertical rods on my double doors, can I use a mullion?
That is a different way to secure the pair, and it changes what hardware each leaf needs. The Von Duprin 051808 extension rod kit supports a vertical rod approach on 33/35/48 Series devices, adjusting from 8 feet 4 inches to 10 inches so the rods reach on taller doors. A mullion approach puts a removable post between the leaves and lets each door take a rim device instead of vertical rods - Falcon offers the 4023 steel mullion for double door exit device applications, with 525 aluminum mullion stabilizers available as an exit device accessory. Choose based on whether the opening must stay clear for wide loads, which is what pushes people toward vertical rods.
13) Is an exit device extension rod kit the same thing as a deadlatch replacement part?
No. The Von Duprin 051808 is an adjustable rod that spans the height of the door to carry motion from the 33/35/48 Series device up to the top latch, covering 8 feet 4 inches to 10 inches of adjustment. A deadlatch replacement part, such as the Falcon T Series 2-3/8 inch square corner deadlatch part, is the latching mechanism itself at the edge of the door. Ordering a rod when the latch is the failed component, or the reverse, leaves the door in the same condition it was in.
14) Is the Von Duprin 051808 a residential part or a commercial one?
Strictly commercial. It is a Grade 1 door hardware component for exit devices, and exit devices themselves are egress hardware for commercial and institutional buildings, not homes. The applications it is specified for are offices, schools, healthcare, retail, industrial, multi-tenant residential common areas and municipal buildings.
How fast can I get the Von Duprin 51808 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 Von Duprin 51808 come with a warranty?
Absolutely. The Von Duprin 51808 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 Von Duprin 51808?
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 Von Duprin 51808 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.
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