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The VIAIR 300P-RVS is a 12-volt portable compressor kit aimed at RV owners who need to top up large tires on the road. It runs a permanent-magnet motor with a 33% duty cycle at 100 PSI and a 150 PSI maximum, moving about 2.3 CFM. A thermal overload protector and a 40-amp inline fuse guard the motor, and the 5-in-1 inflator/deflator hose carries an inline 100 PSI gauge. It is heavier and slower than small emergency inflators, but it is built for sustained work on RV and trailer tires rather than occasional bike or car top-ups.
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Lowest price we've seen: $213.85 on Nov 7 at JB Tools. Tracked across 1 store since Nov 7.
Owners of RVs and large trailers generally rate the 300P-RVS as a dependable onboard compressor for tire top-ups and airing down. They like the duty cycle and the all-in-one hose, and note it is slower and heavier than small inflators.
The VIAIR 300P-RVS is a portable 12-volt tire inflator kit designed for RV tires. It uses a permanent magnetic motor and has a thermal overload protector for added safety.
The compressor runs at a 33% duty cycle at 100 PSI and has a maximum working pressure of 150 PSI. Its air capacity is 2.3 CFM. The 5-in-1 inflator/deflator air hose has an inline 100 PSI gauge.
The compact design stores in a dual compartment carry bag. The kit includes an aluminum sand tray with vibration isolators, a 40-amp inline fuse holder and dual battery clamps.
