Your next buying step
VIAIR 400P EF RV Digital Compressor (part 40244)
Model: 400P EF RV Digital / 40244 · US configuration
Your choices from the finder
Review the product, then choose a seller
Compare offers for this model
Part 40244 is the clamp-powered 400P EF RV Digital with a 45-degree dually attachment and digital target stop. Its page lists 25-foot and 20-foot hose components while the page text and manual claim up to 50 feet of reach; the sources do not explain that difference.
Search this model on Amazon ↗Compare the exact model, package, seller, current price and return terms. Search results can include other versions.
As an Amazon Associate I earn from qualifying purchases. This is an affiliate link.
Assessment scenario: RV and tow-vehicle clamp setup with digital target stopping
A source-based assessment scenario—not a statement of the visitor’s own intent—for an RV or tow-vehicle arrangement that uses 12V battery clamps, a documented Schrader/press-on connection and user-selected target stopping. The two hose components, stated reach, dually attachment and exact electrical instructions require separate package checks; no compatibility or fill-time guarantee is implied.
Explore this buying guide ↗Why consider this model?
- The exact VIAIR variant and family manual identify 400P EF RV Digital / 40244 as a distinct current 12V battery-clamp arrangement with digital selected-target stopping, a standard press-on Schrader route and an additional dually-specific push-on piece.
- VIAIR lists 30A maximum current, 87.3A inrush at 0 PSI, a separate 40A fuse, a 150-PSI compressor limit and pressure-specific duty of 100% at 40 PSI / 30% at 100 PSI. These values identify the model's electrical and duty tradeoffs, not an unmeasured performance promise.
- The two-hose package and 45-degree attachment are specifically described for longer vehicle/RV layouts and inner dual-wheel access; the arrangement differs from the standard 40243 Digital and manual-trigger EF Automatic models.
Tradeoffs to weigh
- The product specifications list a 25-foot primary hose plus a 20-foot extension, while product copy and manual state up to or 50 feet of combined reach. Do not treat 50 feet as verified physical hose length; confirm the actual package and usable route.
- The 30A maximum draw, 87.3A zero-pressure inrush and 40A fuse are separate values. The review supports direct battery clamps, not accessory-socket operation; a seven-way connector is described as separately available.
- The 100%-at-40-PSI duty statement falls to 30% at 100 PSI. The 150-PSI maximum is not the vehicle's target pressure, and the manufacturer’s named timing examples are not independent tests or universal fill-time promises.
- The 45-degree dually chuck is a push-on attachment that does not lock onto the valve. No compatibility with every dual-wheel clearance, tire, seller package, Presta valve or sports ball is established.
- The exact ProductName=40244 SaferProducts.gov lookup returned an empty array only; it is not a recall clearance or serial-number check.
Check these before ordering
- Confirm the offer is 400P EF RV Digital / part 40244—not standard 40243, manual-trigger 40144, or the separate 450P EF RV Digital / 45257.
- Check that supplied battery clamps, two hose sections, the 45-degree dually piece, quick-connect chuck and bag are present in the exact offer; the official compressor photo alone is not a kit guarantee.
- Verify the current part-specific power/fuse instructions against the vehicle electrical system. Do not substitute a dashboard socket or optional seven-way lead unless the manufacturer approves the exact setup.
- Ask the seller/manufacturer to clarify the 25+20-foot component lengths versus the 50-foot stated reach if that detail is essential, and confirm the specific wheel/valve can be reached safely.
- Use the vehicle placard or owner manual’s cold-pressure target; follow attended-use, engine-running recommendation, ventilation, hot-head and cooldown instructions.