Bk 57541 1/2 Mpt Steel Insert Adapter Plastic Pipe

Product Description

The BK 57541 is a 1/2-inch male pipe thread (MPT) insert adapter made from steel, designed to connect plastic pipe to threaded fittings in residential and light commercial plumbing systems. The male pipe thread end engages standard NPT-threaded ports or fittings, while the barbed insert end seats into compatible plastic pipe for a secure mechanical connection. At 0.14 pounds, this is a compact, single-piece fitting suited for applications where a transition from threaded connections to plastic pipe is required. Plumbers and pipefitters keep this adapter on hand for common repair and new-installation work involving plastic supply or distribution lines.

This adapter is used in residential plumbing systems where plastic pipe such as polyethylene or similar flexible pipe connects to a threaded fitting, valve, or pump port. Typical install scenarios include pump discharge connections, irrigation supply lines, and utility plumbing rough-in where plastic pipe is specified. The steel construction provides durability at the threaded engagement point, which sees the most mechanical stress in this type of transition fitting.

Key Features

• 1/2-inch male pipe thread (MPT) for engagement with standard NPT-threaded ports and fittings
• Steel construction for durable threaded engagement under mechanical load
• Insert barb end designed to seat into compatible plastic pipe
• Single-piece construction with no secondary components required
• Lightweight at 0.14 pounds for easy handling and storage

Compatibility

Designed as an OEM-style transition fitting for use with plastic pipe systems requiring a 1/2-inch male pipe thread connection point, as noted in the product description for plastic pipe applications.

Installation Notes

Installation is typically performed by a licensed plumber or qualified pipefitter. Shut off the water supply and relieve system pressure before beginning work. Apply thread sealant tape or compound to the male pipe threads before engagement, and tighten to fitting manufacturer recommendations without overtightening, which can crack plastic receiving fittings. Secure the plastic pipe onto the insert barb with an appropriate clamp rated for the pipe type and system pressure.