Dimensions and Weights: Use the Following Guides to Determine the Size of Your Unit Sizes: 1/2" - 2" (15 - 50mm) Reference Documents: Febco 850 Specifications (PDF:340 KB) Febco 850 Installation Guide (PDF: 768 KB) Febco 850 Maintenance Manual (PDF: 644 KB) Febco 850 Freeze Protection Guide (PDF: 69 KB)

Series 850 In-Line Design Double Check Valve Assemblies are designed to prevent the backflow of pollutants that are objectionable but not toxic, from entering into the potable water supply. They feature a bronze body and threaded ball valve end connections. Maximum Working Pressure: 175psi (12.1 bar). The Febco Series 850 Double Check Valve Assemblies give you a high levels of protection for your water supply for your home or building, however, is not suitable for toxic material handling.

Reference Documents: Febco 850 Specifications (PDF:340 KB) Febco 850 Installation Guide (PDF: 768 KB) Febco 850 Maintenance Manual (PDF: 644 KB) Febco 850 Freeze Protection Guide (PDF: 69 KB)

Expansion tanks are also known as expansion vessels and are used to protect closed water heating systems and domestic hot water systems from excessive pressure. As the water heats up the pressure can increase by 4.5% so they are a very important part of any sealed system. A choice of capacities from top trade brands are available to suit the needs of the cylinder.

Dimensions and Weights: Use the Following Guides to Determine the Size of Your Unit Sizes: 1/2" - 2" (15 - 50mm) Reference Documents: Febco 850 Specifications (PDF:340 KB) Febco 850 Installation Guide (PDF: 768 KB) Febco 850 Maintenance Manual (PDF: 644 KB) Febco 850 Freeze Protection Guide (PDF: 69 KB)