Certified Backflow Prevention Assembly Testing (Residential) Certified Backflow Prevention Assembly Testing - Residential For residential applications, please submit the following information and we will reach out to you shortly. Please enable JavaScript in your browser to complete this form.Name *FirstLastEmail *CompanyAddress *Test Type *New TestRecertificationFor recertification, please list the date of the most recent test in the box below.Recertification Only - List Most Recent Test DateWater Authority *Account Number *APO Number *Located on annual statement. Type "N/A" if not applicable.Location of Assembly *Left Side of HouseRight Side of HouseOtherIf other, enter location in box below.Other Assembly LocationNumber of Assemblies *Comment or MessageSubmit