Matco-norca dntg116 Dielectric Nipple 4 in X 6 in Groove X Mpt

Product Description

The MATCO-NORCA dntg116 is a dielectric nipple designed to create an electrically isolating connection between dissimilar metals in piping systems. Measuring 4 inches by 6 inches, it features a grooved end on one side and a male threaded (MPT) end on the other, allowing it to bridge grooved-pipe systems with threaded pipe runs. Dielectric nipples prevent galvanic corrosion at the joint, which extends system service life in plumbing and hydronic applications. Licensed plumbers and pipefitters install this fitting as part of water heater connections, boiler piping, and similar systems where copper and steel pipe meet.

This fitting is suited for residential and commercial plumbing installations where a transition between grooved mechanical piping and standard male-threaded pipe is required. It is commonly used at water heater connections, boiler inlet and outlet piping, and domestic hot and cold water distribution systems where galvanic isolation between dissimilar metals is required by code or best practice. The groove-by-male-thread configuration supports integration into systems that use grooved couplings on one side of the connection.

Key Features

• Dielectric construction isolates dissimilar metal pipe connections and prevents galvanic corrosion
• Grooved x male thread (MPT) end configuration for versatile system integration
• 4-inch pipe size accommodates large-diameter commercial and residential piping runs
• 6-inch body length provides clearance and alignment flexibility at transition points
• Male pipe thread end connects to standard NPT female fittings and valves

Compatibility

Designed as an OEM-style replacement or new-installation fitting for 4-inch grooved piping systems requiring a transition to male NPT threaded pipe connections with dielectric isolation.

Installation Notes

Installation should be performed by a licensed plumber in accordance with local plumbing codes and IPC requirements. Shut off the water supply and relieve system pressure before beginning any pipe work. Thread sealant or PTFE tape rated for the service fluid should be applied to the male thread end before assembly. Do not overtighten the threaded connection; follow standard hand-tight-plus-turns practice for the pipe material in use.

Technical Specifications

• Type: Dielectric Nipple
• Fitting Size: 4 inches x 6 inches
• End Connections: Groove x Male Thread (MPT)

Standard Information

• Brand: MATCO-NORCA
• Manufacturer Part Number: dntg116