Asc Engineered Solutions 390033157 Grooved X Mpt Adapter Nipple

Product Description

The ASC Engineered Solutions 390033157 is a Gruvlok grooved x male pipe thread (MPT) adapter nipple designed to transition between grooved piping systems and threaded pipe connections. Built from ductile iron, this fitting measures 3 inches on the grooved end and 4 inches on the MPT end, and weighs 2 pounds. It is used in mechanical piping systems where a grooved coupling connection must mate with a threaded fitting or valve. Licensed pipefitters and mechanical contractors install this type of adapter when field conditions require a change in connection type within a piping run.

This adapter nipple is suited for commercial and industrial piping applications including HVAC hydronic systems, fire suppression piping, and general mechanical systems that use Gruvlok-style grooved fittings. The 3 inch by 4 inch configuration addresses installations where the grooved pipe segment steps up to a larger threaded port, such as at pump flanges, valve inlets, or header connections. It is not intended for potable water service unless the specific installation is verified against local code requirements.

Key Features

• Ductile iron construction provides strength and impact resistance in mechanical piping systems
• Grooved inlet end is compatible with standard Gruvlok-style grooved couplings
• Male pipe thread (MPT) outlet allows direct connection to threaded valves, fittings, or headers
• 3 inch x 4 inch size handles common transition requirements in commercial mechanical systems
• 2 pound weight reflects solid ductile iron build suitable for pressurized service

Compatibility

Designed as an OEM-style replacement or field fitting for grooved piping systems using standard Gruvlok 7081 series grooved x MPT adapter nipples in a 3 inch by 4 inch configuration.

Installation Notes

Installation should be performed by a licensed pipefitter or mechanical contractor in accordance with applicable mechanical and plumbing codes. Depressurize and drain the piping system fully before removing or installing any grooved fitting or threaded connection. Apply appropriate thread sealant or PTFE tape to the MPT threads before assembly, and torque to the fitting manufacturer's recommended values. Verify grooved coupling engagement is correct and that the gasket is properly seated before returning the system to service.

Technical Specifications

• Fitting Material: Ductile Iron
• Fitting Size: 3 inches x 4 inches
• Item Weight: 2 pounds

Standard Information

• Brand: ASC Engineered Solutions
• Manufacturer Part Number: 390033157