Watts LFF115 300 B 20-175 PI 4 - Part of the LFF115 Series Z100F-6NH This second check valve kit

This second check valve kit is used to repair or replace the second check on a 3 inch lead free double check detector assembly and used to prevent the reverse flow of polluted water from entering into the potable water supply

and they help reduce and often eliminate having to clean  the inlets saving valuable time and expense

ZRB121-3NH

Built around a uniform-diameter integral trap

Watts LFF115 300 B 20-175 PI 4 - Part of the LFF115 Series Z100F-6NH This second check valve kitThis 4 inch ACV is armed with ArmorTek, a patented 3 part advanced epoxy coating system designed to limit both microbial induced (MIC) and exposed metal substrate corrosion. This pressure reducing control valve is designed to automatically reduce a fluctuating higher inlet pressure to a constant lower downstream pressure regardless of varying flow rates. The quick closing action of the valve limits possible damaging high inlet pressure from passing