Watts LFM115 GRV E 30 300 PI 2 Part of the LFM115 Series R304 Detectable Warning Surfaces This 3 4 inch lead free This 3 4 inch lead free temperature and pressure relief valve is designed to provide automatic temperature and pressure protection to hot water supply tanks and hot water heaters up to 80 This 5 IN full lug style butterfly valve 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 the possibility of damaging high inlet pressure from passing through the valve to downstream piping