Soft-Washing Vinyl Results Home » Got Mold On Your Vinyl Siding? 877-420-WASH | NJ Power Washers » Soft-Washing Vinyl Results This siding was cleaned using 300 p.s.i. of water pressure. An average pressure of a homes water pressure is 60 p.s.i. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Name* Email* Website Save my name, email, and website in this browser for the next time I comment.