What do you call this thing?
An outlet is the wall-mounted fixture where clinical staff plug in a flowmeter, ventilator, suction regulator, or anesthesia machine. Strip away the marketing names and you have a behind-wall assembly brazed to the gas line, and a removable face that accepts the adapter. Two parts.
An outlet point in a piped medical gas distribution system at which the user makes connections and disconnections.— NFPA 99, 2024 · §3.3.182 (Station Outlet)
NFPA calls it a station outlet. Older specs call it a gas terminal. Vacuum codes call it an inlet. In the field, your team calls it whatever the last person who trained them called it.
"What's in a name? That which we call a rose, by any other name would smell as sweet." - Bill S.
Behind every faceplate there are two main assemblies. Click either piece to see the dozen-or-so names you'll hear in the wild.
Fun fact: Quick connect outlets were patented by a Chicago inventor named Albert McKee in September 1951. In his explanation for why it was needed, he said the existing outlets with screw-off caps had become "a convenient means for hanging garments and the like, much to the consternation of the hospital personnel."
Ohmeda · Diamond · Medaes
Two stainless pins on the front body slot into gas-specific bores on the rough-in. The adapter twists in a quarter-turn to lock.
BeaconMedaes. Originally Ohmeda. The most common new-construction connection in North American hospitals.
Allied's Connect2 outlet accepts Ohmeda adapters with a twist release. Amico, Tri-Tech, and Ohio Medical all sell front-body retrofit kits that mount on competing rough-ins.
Chemetron · NCG · Allied Chemetron
Two spring-loaded latches grip the adapter at the sides. Push the front of the adapter in, the latches snap home; press both releases simultaneously to remove.
Allied Healthcare Products (the current owner of the Chemetron line). Extremely common in older US hospitals and renovations.
Allied Connect2 accepts Chemetron adapters with a push-button release. Tri-Tech and Amico both publish Chemetron-to-Pin-Index conversion kits — the most common retrofit pattern in the field.
Puritan Bennett · PB
Each gas has a uniquely shaped socket — a triangle, a slot, a notched rectangle. The adapter physically can't seat in the wrong outlet.
Originally Puritan Bennett (now part of Medtronic). The pure Geometric style is largely a legacy install — you'll find it mostly in older hospitals.
Ohio Medical still produces Puritan-Bennett-compatible front bodies. Most facilities choose to retrofit these to Pin-Index or DISS rather than continue the format.
Diameter Index Safety System · CGA V-1
A threaded fitting with gas-specific thread spacing and diameters. Hand-tight, then a wrench-snug. Manufacturer-agnostic by design.
Everyone. DISS is the CGA V-1 standard, not a proprietary connection. You'll see it on anesthesia machines, ventilator high-pressure inlets, OR ceiling columns, and high-flow specialty outlets.
Universal. Every major manufacturer ships a DISS front body that mounts on their own rough-in, and most retrofit kits offer a DISS option for any legacy rough-in.
Medstar · Med*Star · '07 Series
A round quick-connect adapter with self-sealing poppet — once common in Canadian and select US installations. Now niche.
Allied Medical (which now distributes the Oxequip Med*Star line). UL-listed, CSA-compliant; still supported but rarely specified in new US construction.
Limited. Allied still sells Medstar replacement front bodies for installed rough-ins. Most facilities retrofitting Medstar today are going to Pin-Index or DISS.
The eight pipeline colors you'll see on every faceplate. They're rigid for a reason — color is the first line of defense against a wrong-gas connection. If you ever specify or buy parts internationally, scroll past the US grid; the differences matter.
Patient respiration, resuscitation, anesthesia mix.
Clean, dry, oil-free patient breathing air.
Anesthesia carrier gas; OR / dental.
Surgical and respiratory suction.
Powers surgical instruments; tourniquets.
Laparoscopy insufflation; lab use.
Scavenges exhaled anesthetic agents.
High-pressure air for surgical drills, booms.
ISO uses white, not US green.
ISO: black-and-white check, not US yellow.
Blue — same as US.
ISO: yellow, not US white.
Black — same as US.
Gray — same as US.
Purple/violet — same as US.
Often shown as black-and-white check with red overlay; not specified in ISO 32 for all jurisdictions.
The biggest gotcha: oxygen is green in the US and white in most of the rest of the world. If you ever buy adapters, hose, or testing gear from a non-US supplier, double-check the color spec on the packaging. Or maybe just buy American.
Two-piece design means oftentimes you can fix the outlet during regular operations. Quick rule: front-body issues are usually swaps; back-body issues are usually shutdowns.
You can swap a front body with the room in service. The primary check valve in the rough-in keeps the line sealed the moment the faceplate comes off. Document the part swap, repressurize, test, and you're done.
Repairing a rough-in means shutting off the gas by closing the zone valve, depressurizing, and then performing the repair. This requires coordinating with clinical staff and your director.
A retrofit kit lets you mount a modern front body onto an old rough-in — different connection style, same copper. The wall stays closed, the room stays in service, and your facility moves one step closer to standardization.
Vendors to know: Allied's Connect2 line (accepts Ohmeda and Chemetron adapters in the same outlet), Tri-Tech conversion kits (DISS into legacy rough-ins), Amico universal front bodies, and Ohio Medical's multi-format catalog. BeaconMedaes also publishes manufacturer-direct retrofit kits for their DiamondCare line onto older Diamond II rough-ins.
This is the cheat-sheet version. Lantern's Med Gas Technician course (Outlets 101–104) covers all of this plus model-specific repair tutorials, leak-test procedures, retesting documentation, and the safety rules that keep your team out of trouble in occupied rooms.
See the courseOr email Adam directly: adam.quirk@lanternacademy.com · 551-208-4644
