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VIAIR 400P-RV Automatic Portable Compressor (part 40047)
Model: 400P-RV / 40047 · US configuration
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Part 40047 is an RV-oriented 12V clamp kit with a trigger gun, two hose sections and reach fittings. Its pressure switch does not replace manual tire-pressure control, and the model page/table do not settle every tire-size question.
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Assessment scenario: 400P-RV extended-reach RV inflation
An assessment scenario for RV tire work where a suitable 12V battery-clamp circuit, trigger-operated inflation gun and extended hose/chuck reach are appropriate. The public finder has no RV-use choice; this static scenario is not the visitor’s intent or a compatibility guarantee.
Explore this buying guide ↗Why consider this model?
- The exact 40047 page lists a 30-foot primary hose, a 30-foot extension, a 45-degree extended-reach chuck and a 90-degree twist-on chuck.
- The manual confirms a 12V clamp setup with a 30A maximum draw, 40A fuse and engine-running instructions.
- The manual describes a trigger-operated inflation gun and pressure-check pause; the two operating plans represent alternate chuck arrangements from one kit.
Tradeoffs to weigh
- The manual says the operator must release the gun trigger at the target; the fixed 130/155-PSI switch is pump protection, not a preset tire stop.
- This is an RV-oriented kit; passenger-car compatibility is not established by this scenario.
- The 35-inch table reference and the exact page’s named 275/80R22.5 application are not a universal tire-fit rule.
Check these before ordering
- Verify exact part 40047 rather than 40044 RVS, 40144 RV EF or 40045 AUTO.
- Confirm both hose sections, inflation gun, 45-degree and twist-on chucks, clamps and fuse are included.
- Check the vehicle’s 12V current/fuse needs and ask VIAIR about the exact RV tire/workload; follow duty and hose-care instructions.