# Relief Valves

Calculation Error/Model Fails to Converge: Occasionally when modelling relief valve systems you may obtain a "Calculation Error" without any flow direction indicated. If this occurs, try changing the Relief Valve node for a "Connector" component by right clicking on the relief valve and selecting "Change Component". Ensure the option titled "Keep All Common Property Values" is checked ON. This will ensure any elevation data, etc., is carried over to the new component. Now try calculating the system and review the available pressure at the location of the original relief valve. This will allow you to review the system pressure against the relief valve set point pressure. You can now make any amendments necessary to reach a design solution. If any of the above is unclear or you require any further information, please contact us at: support@fluidflowinfo.com.