Parker 4A-C4L-1-BN-B Check Valve 1/4 Inch Compression Brass

Product Description

The PARKER 4A-C4L-1-BN-B is an inline check valve designed for 1/4 inch pipe with compression x compression end connections. Built from a brass body with a nitrile rubber seal and stainless steel spring, this valve allows flow in one direction and prevents backflow automatically. It carries a maximum working pressure rating of 3000 psi WOG (water, oil, gas) and a crack pressure of 1 psi. Licensed plumbers, HVAC technicians, and instrumentation specialists install this type of valve in fluid and gas distribution systems where backflow prevention is required without manual operation.

This inline check valve is suited for residential and light commercial plumbing, HVAC refrigerant and hydronic lines, pneumatic systems, and instrumentation tubing where 1/4 inch compression fittings are standard. The compression x compression configuration makes it compatible with tubing installations that require a leak-resistant, tool-assisted connection without soldering or threading. Its compact form factor fits in tight spaces common in equipment rooms and mechanical enclosures.

Key Features

• Brass body construction for corrosion resistance in water, oil, and gas service
• Nitrile rubber seal provides reliable shutoff across a wide range of fluid types
• Stainless steel spring ensures consistent cracking and positive valve closure
• 3000 psi maximum working pressure suits high-pressure system applications
• 1 psi crack pressure allows flow initiation at low differential pressure
• Compression x compression ends simplify installation without soldering or threading

Compatibility

Designed as an OEM-style replacement or new-install inline check valve for 1/4 inch compression tubing systems in plumbing, HVAC, and instrumentation applications.

Installation Notes

Installation should be performed by a licensed plumber or qualified HVAC technician. Depressurize and isolate the line completely before removing or installing this valve. Compression fittings require proper tube preparation and correct ferrule seating to achieve a leak-free connection. Verify that the flow direction marked on the valve body matches the intended system flow before tightening fittings.