W
when I'm using my wand, a lot of times I can hear my vac release open up, because of the high pitched noiseThe vacuum you get standing at the truck, sealing off the vac port may be a lot different than what you are getting with 200 feet of hose hooked up and the wand on the carpet. You have a loss of suction at the wand/carpet interface and from your hose cuffs. You should have some else operate the wand and go stand at the truck and see what you are getting.