Just got my new eastwood 100 lb. pressure blaster and I’m having trouble wih it. Yes I’m useing sand (I know, I know) but Im wearing a resperator. Anyway, I sifted the sand and i made sure that moisture wasnt my problem. Pulled the hose off and sand freely flowed thru but when pressurized nothing comes thru the hose. Any ideas? I bought one of harbor freights pressure blasters a while back and had the same problem but just chalked it up to being cheap chinese crap!!