Any damage sustained during handling, storage or erection of the tank or subsequent modification. Reaction or soiling of the tanks from chemical agents not compatible with polyethylene. Damage, failure or leakage caused as a result of any broken, loose or defective connections to the tanks. Iron / metal fittings used on the tank as connections. Attachments, alterations of the structure or walls of the tanks including welding and use of adhesives etc. Usage of tanks for purpose not intended to. Repair work done not by JoJo personnel. The lids and roof section of tanks are not intended to carry weight or human movement. Liquid contents exceeding 40° C. All vertical tanks intended for stationary use only. Septic tanks to be used and installed as per installation instructions.