Dometic 92089 Kit SVC Valve Gas Assembly 10 Gallon. Water heater gas valve. For Atwood 10 gallon water heaters. Dometic believes in a decentralized business model with clear coordination and common processes to increase ownership and drive change in the organization, which will lead to further growth and improved efficiency in all parts of the company. Through innovative product development, geographical expansion and acquisitions, the company has grown into a global leader in mobile living.