All Harvel LXT® purified water piping shall be joined utilizing Harvel LXT® One-Step Solvent Cement specifically formulated for joining this material. All solvent cemented welds shall be made-up in strict accordance with the written assembly procedures for the product as stated in Harvel LXT® product bulletin (HPB-114). Installers must become familiar with these procedures prior to assembly. The use of solvent cements and/or primers other than Harvel LXT® One-Step is not acceptable. Joint integrity on solvent welded connections shall be confirmed with visual inspection utilizing a light source to inspect the cemented surfaces for uniformity. All solvent cemented connections shall be allowed to set and cure properly prior to pressure testing/rinsing procedures per the joint cure schedules as stated Harvel LXT® product bulletin (HPB-114).