The Hatco 3.02.022.00 Temperature/Pressure Relief Valve helps protect water-heating equipment by releasing excess pressure or temperature when operating conditions exceed safe limits. Designed with a 3/4-inch NPT connection, this valve works by automatically opening when the internal pressure or temperature reaches its specified threshold, allowing hot water or pressure to escape and ... https://partsfe.ca/30202200-hatco-presstemp-relief-vlv