If You Use Pneumatics, You Must Include...#
The Game Manual (R805) lists a set of mandatory components for any robot with a pneumatic system. Build all of these or your robot fails inspection:
- One legal compressor — the only air source, within the 1.1 cfm limit (R806).
- A pressure relief valve (R811) — connected directly to the compressor with hard fittings and set to release at 125 psi.
- A pressure switch or analog pressure sensor (R812) — the Nason SM-2B-115R/443 pressure switch and/or the REV Analog Pressure Sensor (REV-11-1107), wired into the high-pressure circuit so the controller stops the compressor at the limit.
- At least one pressure vent plug (R813) — and it must be accessible without removing other components so air can be dumped safely.
- Two pressure gauges (R810) — one showing stored pressure (high side) and one showing working pressure (downstream of the regulator), both in a visible location.
- One primary working-pressure regulator (R808) — adjustable, relieving, capped at 60 psi outlet.
Inspector Checks#
Inspectors verify each of these physically. They confirm the relief valve is hard-plumbed to the compressor, that gauges are present and readable, that the vent plug is reachable, that no illegal parts sit on the high-pressure side, and that all components carry adequate pressure ratings. They will check that the compressor and stored-pressure shutoff behave correctly.
Be Inspection-Ready#
- Label or know where each required component is so you can point to it quickly.
- Keep the vent plug genuinely accessible — do not bury it behind a battery or bumper.
- Make sure gauges face outward and are legible.
- Have spare fittings, tubing, and PTFE tape on hand; small leaks are the most common last-minute fix.
- Re-read the current FRC Inspection Checklist (published each season) before the event so there are no surprises.
Common Inspection Failures#
Missing or unreadable gauges, a vent plug buried behind other parts, a relief valve connected with tubing instead of hard fittings, illegal components on the high-pressure side, and leaks that prevent the system from holding pressure. All are avoidable with the checklist and a careful pre-event review.
the part worth keeping
Key takeaways
- Mandatory parts (R805): compressor, relief valve (hard-mounted, 125 psi), pressure switch/sensor, accessible vent plug, two gauges, and one primary regulator.
- The relief valve must connect directly to the compressor with hard fittings, not tubing (R811).
- The vent plug must be reachable without removing other components (R813), and both gauges must be visible and legible (R810).
- Review the season's FRC Inspection Checklist beforehand; missing gauges, buried vent plugs, and leaks are common failures.
Mechanical, Build & PneumaticsSafety, Rules, and Testinglesson 2 of 3
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where this came from
Sources and corrections
This lesson is AI-assisted: drafted from primary sources, then reviewed and edited by hand. Errors still get through. When one is reported we fix it and write down what changed, in public, in the corrections log.
sources and further reading
- firstfrc.blob.core.windows.net2026 FRC Inspection Checklist (PDF)
- frcmanual.com2026 FRC Game Manual - Robot Construction Rules (R)
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answer sheet
Lesson quiz
All 3 right completes the lesson. Miss one and only that question comes back, anything you already answered correctly stays banked.
0 of 3 answered
01According to R811, how must a pneumatic robot's pressure relief valve be connected and set?
02Where must the two required pressure gauges be located on an inspection-legal FRC pneumatic system?
03Which component is required so a robot's stored pneumatic pressure can be safely dumped by hand at inspection?
Answer every question to submit.
All 47 lessons in Mechanical, Build & Pneumaticsopenclose
01 / prerequisites
02 / drivetrains
03 / power-transmission
04 / structure-materials-fasteners
05 / mechanisms-fabrication-assembly
06 / pneumatics-fundamentals
07 / pneumatic-components
08 / build-wire-program
09 / safety-rules-testing
10 / worked-examples-mini-projects
- Not read yet:Mini-Project 1: A Single-Jointed Arm From Math to Motion
- Not read yet:Mini-Project 2: A Two-Stage Cascade Elevator
- Not read yet:Mini-Project 3: A Velocity-Controlled Flywheel Shooter
- Not read yet:Mini-Project 4: A Pivoting Roller Intake
- Not read yet:Mini-Project 5: Integrating a COTS Swerve Module
11 / common-mistakes-troubleshooting
- Not read yet:Pneumatics Won't Fire: A Full Diagnostic Tree
- Not read yet:The Robot Won't Drive Straight (and Other Drivetrain Sins)
- Not read yet:Gearboxes That Grenade and Fasteners That Vibrate Loose
- Not read yet:Closed-Loop Mechanisms That Oscillate, Sag, or Stall
- Not read yet:Field-Ready Reliability: Inspection, Spares, and the Pit Checklist
12 / advanced-techniques-case-studies
- Not read yet:Characterizing Any Mechanism with SysId
- Not read yet:Simulation-Driven Design with WPILib Physics Models
- Not read yet:Motion Profiling and Superstructure Coordination
- Not read yet:Designing for Weight, Stiffness, and Manufacturability
- Not read yet:Case Studies: Learning From Open Alliance Robots