http://inspire.ec.europa.eu/codelist/WaterAppurtenanceTypeValue/surgeReliefTankINSPIRE Registry teamJRC-INSPIRE-SUPPORT@ec.europa.euhttp://inspire.ec.europa.eu/registry2015-08-18 17:38 PM CEST2015-08-18 17:38 PM CESTsurge relief tankSurge relief tank.A surge relief tank is a piece of equipment used to absorb pressure increases in the water system. Surge relief tanks provide a buffer against throttling within the system by accepting water into a tank through a pressure valve.