ASI 8156 Specimen Pass Through Box - includes Extension Sleeve & Flange - Recessed

The ASI 8156 is a recessed two-door specimen pass-through cabinet for healthcare and laboratory facilities — designed for through-wall installation with the included extension sleeve and flange. Specimens are deposited through one side of the unit; once that door closes, the specimen is retrievable on the opposite side. An internal latch prevents both doors from being opened simultaneously, helping preserve the separation between the two sides. The 8156 includes the recessed cabinet (Model 8154) plus the extension sleeve and flange (Model 8155) that would otherwise be sold separately. Type-304 stainless steel construction with a satin finish on all exposed surfaces. As an Authorized Stocking Distributor with our Low Price Guarantee, Total Restroom offers the ASI 8156 from a U.S. distribution network.

Specifications

• Model / MPN: 8156 (also listed as 10-8156)
• Configuration: Specimen pass-through cabinet — recessed, with extension sleeve and flange
• Wall thickness range: 5-1/2" to 9-7/8" (140 to 251 mm)
• Overall dimensions: 13-1/4" W × 12-3/4" H × 6" D (337 × 324 × 152 mm)
• Door / cabinet material: Type-304, 18-gauge stainless steel — satin finish
• Flange material: Type-304, 22-gauge stainless steel — satin finish
• Door opening / height dimension shown: 12-3/4" (324 mm)
• Hinge: Heavy-duty stainless steel multi-staked piano hinge, 3/16" diameter (Ø5 mm)
• Locking: Stainless steel bar locking mechanism — internal latch prevents simultaneous door opening
• Drip tray: Stainless steel, removable for cleaning
• Door return: Door-closing spring (90° opening)
• Mounting holes: Four 3/16" diameter (Ø5 mm) dimpled holes per flange
• Mounting hardware: #10 self-threading Phillips flat-head (or oval-head) screws — supplied
• Includes: Recessed cabinet (8154) + extension sleeve and flange (8155)
• Warranty: 1-year from date of invoice (ASI)

Key Features

Controlled Specimen Pass-Through
The two-door pass-through design lets specimens move from a patient or sample-collection area into a laboratory without opening a direct passage between the two spaces. Specimens are deposited through one side; the second door can only be opened once the first is closed and latched. That helps preserve the separation between patient-side and lab-side spaces during specimen transfer.

Internal Bar Locking Mechanism
A stainless steel bar locking mechanism inside the cabinet helps prevent simultaneous opening during specimen transfer — one door must be closed and latched before the other can be opened. The interlock is mechanical, so staff don't need to remember a procedure during a busy shift.

Removable Stainless Steel Drip Tray
An interior stainless steel drip tray catches any leaks or fluid from specimen containers. The tray is removable for cleaning. ASI also specifies that the lock cylinder can be removed for sterilizing or autoclaving when necessary.

Wall-Thickness Adjustability
The 8156 ships with the extension sleeve and flange (Model 8155) included, so the same SKU works across wall thicknesses from 5-1/2" (140 mm) to 9-7/8" (251 mm). One side carries the fixed flange; the other carries the adjustable flange that absorbs the wall-thickness variation. This is the version that includes the extension sleeve and flange. Model 8154 is the recessed specimen pass box without the extension sleeve and flange.

Type-304 Welded Stainless Construction
Cabinet and door are 18-gauge Type-304 stainless steel; flange is 22-gauge Type-304. All exposed surfaces have a satin finish. Heavy-duty multi-staked stainless steel piano hinge (3/16" diameter) handles the cycle counts of healthcare environments. Door-closing spring returns the door to closed position automatically.

Installation Guidance

Mount the 8156 in a partition cutout or through-wall opening. ASI lists the partition cutout opening (PCO) required as 11-1/2" W × 11" H. The extension sleeve and flange are used for through-wall installations from 5-1/2" (140 mm) to 9-7/8" (251 mm) thick. Secure the fixed flange first through the four 3/16" diameter dimpled mounting holes using #10 self-threading Phillips flat-head (or oval-head) screws (supplied). On the opposite side of the partition, secure the adjustable flange the same way — the adjustable flange absorbs variation in wall thickness within the supported range.

For 2010 ADA Accessibility Standards compliance, install the unit with the centerline of the door pulls at 48" (1219 mm) maximum AFF if clear floor access is provided, or 46" (1168 mm) maximum AFF if side reach over an obstruction is required. Confirm against the project's governing accessibility code.

Model 8154 is the standalone recessed specimen pass box without the extension sleeve and flange — used for installations where the through-wall extension is not required.

Frequently Asked Questions

What is the ASI 8156 used for?
The 8156 is a two-door specimen pass-through cabinet that provides a controlled passage between a patient or specimen-collection area and a laboratory. Specimens are deposited through one side; once that door closes and latches, the second door can be opened on the lab side to retrieve the specimen. It's used in clinics, hospitals, and laboratories where staff need a way to transfer specimens between two sides of a partition while keeping doors interlocked against simultaneous opening.

What's the difference between the ASI 8154 and the ASI 8156?
Both are recessed specimen pass-through cabinets with the same internal mechanism. The 8154 is the recessed specimen pass box without the extension sleeve and flange. The 8156 includes the extension sleeve and flange (Model 8155) for through-wall installations from 5-1/2" (140 mm) to 9-7/8" (251 mm) thick. If your installation needs the extension sleeve and flange, the 8156 is the right SKU.

Can both doors be opened at the same time?
No — that's the point of the design. An internal stainless steel bar locking mechanism prevents simultaneous opening. One door must be closed and latched before the other can be opened. The mechanical interlock helps preserve the separation between patient-side and lab-side spaces during specimen transfer.

Is the cabinet easy to clean and sterilize?
Yes. All exposed surfaces are Type-304 stainless steel with a satin finish — stain-resistant and easy to clean. The interior drip tray is removable for cleaning. ASI also notes that the lock cylinder can be removed for sterilizing or autoclaving when needed.

What size opening do I need to install the 8156?
ASI lists the partition cutout opening (PCO) as 11-1/2" W × 11" H. The extension sleeve and flange are used for through-wall installations from 5-1/2" (140 mm) to 9-7/8" (251 mm) thick. The fixed flange secures on one side through four dimpled mounting holes; the adjustable flange secures on the opposite side and absorbs variation within that wall thickness range. Mounting hardware (#10 self-threading screws) is supplied.

Does the door close automatically?
Yes. A door-closing spring returns the door to its closed position once released. The door inside the extension sleeve opens to 90° and is then returned by the internal extension spring.

Is the ASI 8156 ADA-compliant?
When installed with the centerline of the door pulls at 48" (1219 mm) maximum AFF for clear floor access — or 46" (1168 mm) maximum AFF if side reach over an obstruction is required — the 8156 supports compliance with the 2010 ADA Accessibility Standards. Always confirm against the project's governing accessibility code.

What's the warranty?
ASI provides a 1-year warranty from the date of invoice on the 8156.