Is it against plumbing code to discharge water hotter than 140°F into a drain?

In most New England states, plumbing codes restrict the temperature of wastewater discharged to drains or sanitary systems, especially in industrial facilities. For example, the Massachusetts Uniform State Plumbing Code (248 CMR 10.14) limits water entering a sanitary drainage system to around 150 °F, while the Connecticut State Plumbing Code specifies that any wastewater exceeding 140 °F requires piping rated for that temperature. These requirements are intended to protect PVC or ABS drain lines from warping or failure and to ensure compliance with state plumbing and safety standards.

The ITV Drain Tempering Valve provides an automatic, code-friendly solution by sensing the effluent temperature and injecting cold water only when needed. This keeps discharge temperatures safely below regulatory limits while conserving water and protecting your plumbing infrastructure. If your operation releases hot wastewater—from boiler blowdown, sterilizers, or process drains—you should check your local jurisdiction’s temperature discharge limits to ensure compliance. Installing an ITV tempering valve helps you stay within those limits, avoid costly piping upgrades, and maintain a safe, efficient system.