Rola-Chem 521170 In-Line Check Valve – 1/4″ MNPT x 3/8″ Hose Barb

The Rola-Chem 521170 In-Line Check Valve is an OEM one-way valve designed to protect chemical feed systems by preventing reverse flow. It features a 1/4″ MNPT (Male National Pipe Thread) outlet and a 3/8″ hose barb inlet, offering a secure and chemically resistant connection between dosing lines and injection points.

Ideal for chlorine, acid, and other treatment chemicals, this valve is used in Rola-Chem peristaltic pump installations for pools, spas, and commercial water systems. Its compact and durable design ensures consistent operation and helps maintain the accuracy of chemical dosing systems.

Key Features

• One-way check valve prevents backflow

• 1/4″ MNPT (male) x 3/8″ hose barb connection

• OEM part for Rola-Chem chemical feed systems

• Durable, chemical-resistant plastic body

• Compatible with acid, chlorine, and other pool chemicals

• Ensures proper chemical flow direction and system protection