Complete With Low Press Chemical Nozzle. The ST53 Valve with M22 Female Swivel and Low‑Pressure Nozzle is a brass inline valve assembly designed for use with pressure‑washing and chemical‑application systems. It allows smooth switching to low‑pressure chemical delivery while maintaining reliable flow control. Fitted with an M22 female swivel inlet and a 1/4" female outlet, it operates safely up to 250 bar and 150°C, making it a durable, versatile component for professional cleaning setups.