Abstract: A bracket assembly is provided for supporting and stabilizing valves or other accessories that are attached to chemical canisters. Such valves and related connectors are subject to damage and resulting leakage due to forces applied to them during shipment, handling, installation and use. In order to reduce such damage, a rigid baseplate is provided that can be attached to the port tube of a standard canister. Rigid angle brackets may be connected to the baseplate and to the valves to provide a strong, rigid support to hold the valves position relative to the canister. Such a bracket assembly removes stresses from conduits and sealed couplings between the valves and the canister, thus preventing damage to the couplings due to the application of external forces to the valves. The invention is also applicable to support other sorts of accessories mounted on canisters of various types and sizes.