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Orange ductile iron clamp fitting with grooved ends and threaded branch

Gruvlok

Gruvlok Clamp-T 4x1.5in Iron 500psi Orange

SKU CH-2KRG-WGWCS

A ductile-iron grooved clamp with FNPT branch rated 500 psi at up to 230 °F

  • Rated for 500 psi high-pressure systems
  • Meets ASME B 31.1 and B 31.9 standards
  • Operates from -40 to 230 degrees F
  • Ductile iron construction per ASTM A536
  • NFPA 75 compliant for fire protection

Gruvlok Clamp-T 4x1.5in

This Gruvlok Clamp-T fitting connects a 4 inch grooved pipe run to a 1.5 inch FNPT branch. It is built from ductile iron for mechanical strength in commercial plumbing and fire protection systems. The orange coating provides visible identification on site. It suits installers who need a rigid, grooved-to-threaded transition.

Replaces welded or flanged tees

The grooved design removes the need for on-site welding or flange bolt-up, cutting installation time on 4 inch mains. The jump is worth it when the system uses grooved couplings elsewhere and a 1.5 inch threaded outlet is required for drops or instrumentation. It avoids hot-work permits and heavy flange assemblies.

Rated 500 psi at 230 °F

The fitting meets ASME B31.1 and B31.9, ASTM A536, and NFPA 75 for pressure piping and fire service. Maximum working pressure is 500 psi across a temperature range of -40 °F to 230 °F. It is not suited for services exceeding that pressure or temperature, nor for piping systems that require other joining methods.

Highlights

  • Rated for 500 psi high-pressure systems
  • Meets ASME B 31.1 and B 31.9 standards
  • Operates from -40 to 230 degrees F
  • Ductile iron construction per ASTM A536
  • NFPA 75 compliant for fire protection

Specifications

BrandZORO SELECT

Questions about this item

What pipe sizes does the 4 in x 1.5 in Clamp-T connect?

The fitting joins a 4-inch grooved main to a 1.5-inch FNPT branch, using a ductile-iron body rated for 500 psi.

How do I install the U-bolt correctly and what is the common mistake?

Seat the gasket fully in the grooved ends, then tighten the 1/2-inch U-bolt nuts evenly; the step often missed is alternating torque so the clamp draws up parallel.

When should the gasket be replaced on this ductile-iron Clamp-T?

Inspect the gasket at each system shutdown; replace it if you see cracking, hardening, or leakage, especially after exposure near the 230 °F upper limit.

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