Anyone that has a PW for home use needs to go invest the $35 in a turbo nozzle. I have a 3000Psi, and honestly the tips that come with it do not do an adequate job for slabs/patios/driveways, etc. Someone mentioned a while back getting one. I was hesitant, but figured I would try it and return it if I didn't like it.
Basically, if anyone has seen the circular attachments used on driveways on commercial pressure washers, it turns your home model into one of those. My back patio gets really nasty by this time of year. What takes me normally about 3 hours, took me 30 minutes. I was absolutely flabbergasted
http://www.lowes.com/pd_183832-60455-SGY-PWA46_0__?productId=3117679&cm_mmc=PLA_OutdoorPowerEquipment-_-PressureWasherTools-_-gps-_-PreciseFit%203000%20PSI%20Turbo%20Nozzle%20&adtype=pla&cagpspn=pla
