Safety check valve with drain 111-1/111-3, No name (MPN P20-201-0150-000)

The Safety check valve with drain 111-1/111-3 is a combined backflow prevention and drain valve intended for fluid systems that require controlled discharge and protection against reverse flow. The valve integrates a check mechanism with a drain port to allow manual or automatic release of trapped liquid or pressure. It is designed for straightforward inline installation in plumbing, heating, and industrial piping where maintenance access and reliable operation are important.

Advantages

This combined valve reduces the need for multiple fittings by providing both backflow prevention and a drain function in a single unit. The integrated drain simplifies system purging and maintenance while minimizing potential leak points. The valve's compact design supports space-efficient installation and can be used with common pipework materials. Constructed for repeatable operation, it supports standard service procedures for systems that require periodic draining or pressure relief.

Suitable for

• Domestic and commercial plumbing systems where backflow protection and controlled discharge are required
• Heating installations including boilers and radiators that need purging or draining points
• Industrial fluid lines where prevention of reverse flow and ability to remove trapped fluid are necessary
• Maintenance points in closed-loop systems for routine service and venting

Key specifications

• Combined function: check (non-return) valve with integrated drain port
• Suitable for inline installation in liquid piping systems
• Operable for manual or automatic drain/discharge
• Compact form factor compatible with standard plumbing connections
• Intended for plumbing, heating and general industrial fluid applications

How to use

Install the valve in the flow direction indicated by the body orientation so the check element prevents reverse flow. Connect to compatible piping using appropriate fittings and sealing methods for the system medium. Use the drain port to purge trapped fluid or relieve pressure: operate the drain according to system procedures, either manually or via an automated actuation line if available. Perform periodic inspections to ensure the check mechanism and drain sealing remain functional and free of debris.

Usage recommendations

Ensure compatible fluid type and operating pressure range before installation. Provide access for maintenance and allow sufficient clearance to operate the drain. Follow local codes and standard installation practices for backflow prevention devices and draining connections.

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