well in the last 5 years of me owning my airdog 2 i have had to replace it 6 times
this last time it only lasted me 2 months.
one thing i can say about pureflows customer service is Jeremy will take care of you and they stand behind their warrenty
they have an upgrade it is the 4g hd pump since i have had nothing but problems with the unit
they gave this 300 dollar upgrade for free
to say as of right now i am really impressed with it
no pressure drop under
wot application
no pressure fluctuation at idle and normal driving
very quiet