Valve has flow capacity of 3

coat nuts and bolts to prevent corrosion

internal flow control and filter to remove impurities from water flow

and not for use with aggressive acids or caustic solutions

Haws 8169 Flush To Ceiling Drench Shower Width-20" Valve has flow capacity ofHand Activation Ceiling Mount Full Body Coverage Area 1" IPS Supply Inlet Meets ANSI Standard Z358. 1 The HAWS model 8169 is flush to ceiling mounted drench shower with AXION MSR polished stainless steel showerhead. The unit also includes a self regulating flow control for the showerhead, a chrome plated brass stay open ball valve with stainless steel ball and stem, a stainless steel pull rod with handle, and a universal sign. From the Manufacturer: