I have a Harbor Freight 2 Gal Fortress Compressor. It's for 110 only (no 12 volt) but that hasn't been a problem. It tops out at 135 PSI and it will push 2.1 CFM at 90 PSI. I check and fill the tires in my RV every morning before I hit the road and this thing is super quiet (60db) so I can run it without waking the neighbors. The current price is $160 but it goes on sale fairly often or you can use one of their 20% off coupons. Even at that price it's a helluva lot cheaper than a Viair and it's capable of running some air tools around the house when it's not in the RV. It blows out the fresh water system without a problem. It will not blow out my lawn sprinkler system but I didn't expect it could. The best part is that my 4k generator and 30 amp shore power run it without popping a circuit breaker. A lot of the cheapo pan cake compressors will not.
__________________
|