The Eaton LS-11 is part of the Eaton Vacuum Breaker product line, which provides external pressure relief for residential, commercial and industrial applications. The LS-11 is designed to provide protection against both external and internal overpressure. It is designed with a heavy duty discharge ratio that helps prevent pressure-induced water hammer, while its brass construction ensures long lasting performance. The LS-11 is a direct replacement for most legacy products and can fit both new and existing systems. The LS-11 is UL Listed and FM approved, meeting the strictest of regulatory requirements.