What if the customer is on a water meter,do they not expect you to use your own water.Also i have noticed that the hose with the filter on,that you use to draw from a tank are not very long on the P/W i have seen on ebay.....what if the patio you are cleaning is a fair distance away and you need to draw from the tank on the van,because of the said short draw hose you would need a very long hose with the lance on...would you not lose pressure?There is another thing that confuses me( i'm easily confused :

) , most people on here say you need to get a 15lpm P/S minimum.If you need to draw fom a tank on the van or a bowser trailer,this would not last very long at 15lpm or more.I hope this all makes sense........cheers....dave.