Cal-Royal ADB-703 Automatic Do...
IN STOCK (leaves warehouse same day if ordered before 3pm ET)
$82.96
Cal-Royal ADB-703 Automatic Door Bottom, Light Duty Mortised Application with Vinyl Seal

Cal-Royal ADB-703 Automatic Door Bottom, Light Duty Mortised Application with Vinyl Seal

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Model: ADB-703D-36
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In Stock (leaves warehouse same day if ordered before 3pm ET)

$82.96
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Cal-Royal ADB-703 Automatic Door Bottom, Light Duty Mortised Application with Vinyl Seal

The Cal-Royal ADB-703 Automatic Door Bottom is a light-duty, mortised-application door bottom constructed from extruded aluminum combined with a vinyl seal to provide an efficient barrier against air, smoke, sound, and fire infiltration at the base of the door. Designed for mortised installation, this unit measures 9/16" (14.8) in width, 1 7/16" (37mm) in height, with a maximum drop of ¾" (19.1mm), making it suitable for standard commercial door applications where a low-profile, effective seal is required. It can be installed on either wood or hollow metal doors and is non-handed, allowing reversible installation for left or right hand doors, which simplifies stocking and installation for contractors and facility managers alike.

Key Features

  • Compact Profile Dimensions: Width of 9/16" (14.8) and height of 1 7/16" (37mm) allow for a low-profile mortised installation without excessive door preparation.
  • Maximum Drop Specification: ¾" (19.1mm) maximum drop ensures consistent, effective sealing contact with the floor or threshold surface.
  • Extruded Aluminum Construction: Combined with a vinyl seal for a durable housing that maintains long-term performance in commercial door applications.
  • Effective Environmental Seal: Blocks out air, smoke, sound, and fire at the door bottom for improved comfort and safety.
  • Non-Handed, Reversible Design: Can be installed for either left or right hand door configurations, reducing inventory complexity.
  • Low Closing Force Operation: Engineered for smooth door operation with slotted holes provided for precise adjustment during installation.
  • Versatile Door Compatibility: Suitable for installation on wood or hollow metal doors as specified for this model.
  • Installation Guidance: Maximum cut should not be made closer than 1 ½" to the set screw to preserve proper function.

Technical Specifications

  • Subcategory: Thresholds
  • Product Group: Door Trim and Accessories
  • Product Subgroup: Door Bottom Sweeps and Door Shoes
  • Commercial/Residential: Commercial
  • Product Category: Door Trim and Accessories
  • Department: Door Hardware

Typical Applications

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

Why Cal-Royal ADB-703?

Cal-Royal door bottom products combine extruded aluminum construction with vinyl sealing technology to deliver a dependable barrier against air, smoke, sound, and fire at the door threshold. The non-handed, reversible design and low closing force operation make the ADB-703 a practical choice for commercial applications where reliable, low-maintenance performance is essential.

Product Specs

Subcategory:
Thresholds
Product Group:
Door Trim and Accessories
Product Subgroup:
Door Bottom Sweeps and Door Shoes
Product Type:
Automatic Door Bottoms
Commercial/Residential:
Commercial
Product Model:
ADB-703
Product Category:
Door Trim and Accessories
Department:
Door Hardware

Cal-Royal ADB-703D-36 – Frequently Asked Questions

1) Will the Cal-Royal ADB-703 automatic door bottom fit a door that already has a mortised cutout?
The ADB-703 is a mortised-application unit, so it drops into a routed pocket in the door bottom rather than surface mounting to the face. The housing is 9/16 inch wide by 1 7/16 inch high, so that is the pocket it needs. If your door has no mortise and you do not want to rout one, a surface mount automatic door bottom like the Pemko SA Series is the type to look at instead.
2) What is the difference between the Cal-Royal ADB-703 and the Pemko SA Series automatic door bottom?
Both are automatic door bottoms, so both drop a seal against the floor when the door closes and lift it clear when the door opens. The difference is how they attach to the door. The Cal-Royal ADB-703 is a mortised-application unit with a vinyl seal, so the door edge is routed out and the housing sits inside the bottom rail with only the seal exposed. The Pemko SA Series 36 inch automatic door bottom is a surface mount unit with a GREENGUARD Gold certified Eco-V insert, so it fastens to the face of the door with no mortise cut required. Choose the ADB-703 when the specification calls for a concealed, low-profile bottom and the door can be prepped; choose the surface mount SA when you are retrofitting an existing door and do not want to route it.
3) What should I use if the door is already hung and I cannot mortise the bottom rail?
The Cal-Royal ADB-703 requires a mortise cut in the bottom of the door, which is practical on new wood or hollow metal doors being prepped but awkward on a door already hung and finished. For that retrofit, the Pemko SA Series 36 inch surface mount automatic door bottom gives you the same automatic drop-and-retract action while fastening to the door face, so no routing is needed. If the opening does not require an automatic action at all, the Pemko 345 Series 36 inch door bottom sweep with rain drip also mounts to the face of the door.
4) Will an automatic door bottom work on a hollow metal door, or is it wood only?
Both. The ADB-703 mortises into wood or hollow metal doors. What decides it is whether the leaf can take a 9/16 by 1 7/16 inch pocket at the bottom rail without cutting into a lock edge or a core reinforcement.
5) What lengths and finishes does the Cal-Royal ADB-703 come in?
Two lengths, 36 inch and 48 inch, each in either AV mill finish aluminum with vinyl insert or DV dark bronze anodized aluminum with vinyl insert. All four combinations are orderable, so a bronze 48 inch is a stock configuration. Mill finish is the usual pick where the unit is hidden in the mortise; dark bronze matches bronze anodized frames and storefront.
6) Will an automatic door bottom make the door harder to close?
The ADB-703 is built for low closing force, which matters on openings with a light closer or where you cannot afford extra resistance at latching. Slotted mounting holes let you fine tune the drop height at install, so you set just enough seal contact to close the gap without loading up the door.
7) Is the Cal-Royal ADB-703 heavy enough for a high traffic commercial opening?
It is a light duty unit, rated commercial. That suits offices, classrooms, retail, and multi-tenant corridors where the door cycles normally. For a heavily abused opening, a stairwell or a loading area running hundreds of cycles a day, step up to a heavy duty automatic door bottom rather than this one.
8) Which automatic door bottom carries a low-emitting materials certification for a LEED or healthcare project?
The Pemko SA Series 36 inch surface mount automatic door bottom uses a GREENGUARD Gold certified Eco-V insert, which is the one to specify when the submittal asks for low-emitting materials on a school, healthcare, or LEED-tracked project. The Cal-Royal ADB-703 is the mortised alternative, with an extruded aluminum housing and a vinyl seal, chosen when the drawing calls for a concealed door bottom rather than a certified insert. If both the mortise detail and the certification matter, confirm which the specification is actually enforcing before ordering.
9) For an exterior door that needs to keep driving rain out, is the ADB-703 the right part?
The Cal-Royal ADB-703 is built to block air, smoke, sound, and fire at the base of the door, and its seal only contacts the floor when the door is closed. For an exterior opening where water running down the face of the door is the problem, the Pemko 345 Series 36 inch door bottom sweep pairs a PemkoPrene insert with a rain drip, the projecting lip that throws water clear of the sill. The two are often used for different openings in the same building: the ADB-703 on interior corridor and cross-corridor doors, the 345 Series sweep on the exterior entrances.
10) Can the ADB-703 automatic door bottom help with sound and smoke at the door bottom?
The extruded aluminum housing with a vinyl seal blocks air, smoke, sound, and fire infiltration at the base of the door. That is the whole reason to mortise one in: the undercut gap is the single largest leak path on an otherwise gasketed door, and gasketing the jambs without addressing the bottom leaves it open.
11) Do I have to order handed automatic door bottoms for left hand and right hand doors?
Not with the Cal-Royal ADB-703. It is non-handed and reversible, so one part number covers both left hand and right hand doors and a property or MRO stockroom can carry a single item for the whole fleet. It comes in 36 inch and 48 inch lengths. Where the opening cannot be mortised, the Pemko SA Series 36 inch surface mount automatic door bottom is the alternative to stock alongside it.
How fast can I get the Cal-Royal ADB-703D-36 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 Cal-Royal ADB-703D-36 come with a warranty?
Absolutely. The Cal-Royal ADB-703D-36 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 Cal-Royal ADB-703D-36?
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 Cal-Royal ADB-703D-36 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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