Place a hand full of drywall screws into the tank and shake them around vigorously for several minutes. These will dislodge any unfastened particles of rust. In the case of Fiberglass and plastic tanks, this will tough up the tank inside, strengthening adhesion. There are many diverse sections on the https://caswellengineering46678.59bloggers.com/38112745/about-cibse-approved-cpd