GUARANTEE: Clarke tanks carry a 30 day guarantee against defects and 1 year against breakage. We reserve the right to refuse to replace tanks that have failed due to improper maintenance, incorrect mounting, modifications, or fittings installed that were not originally supplied with the tank. We will only warranty accessory items such as gaskets, o-rings, cap gaskets, gas caps or petcocks for a period of 6 months. CALL BEFORE RETURNING ANY TANK. Then send your defective tank, invoice, R.A.# and a description of the defect, postage paid, to: 13388 S. Molalla Forest Rd. Molalla OR. 97038