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NIBCO Copper Reducing Coupling

NIBCO Copper Reducing Coupling

Made in America

Support American manufacturers + independent hardware retailers in one purchase.

Meet the NIBCO Copper Reducing Coupling — a precise, durable connector crafted to join copper pipes while transitioning between two different diameters. Built from high-quality cop…

Nibco MPN W00815C In Stock & Ready to Ship
Local Price Check i Local stores may price this as low as $16.99. Our online price is $18.99.
$18.99
Includes free shipping on orders over $75 · $8.99 standard below
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You might find it for less locally. Independent retailers often offer competitive pricing — some products are even cheaper in-store than online.
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Keep the neighborhood working. Every dollar spent at an independent retailer returns roughly 3x more to your local economy than at a national chain.

About Product Overview

Meet the NIBCO Copper Reducing Coupling — a precise, durable connector crafted to join copper pipes while transitioning between two different diameters. Built from high-quality copper and NSF-listed for potable water, this fitting delivers reliable performance where it matters most in your plumbing system.

  • Precise size reduction: seamless transition between two copper tube diameters in a single, compact fitting, simplifying layouts and reducing the need for extra adapters.
  • Robust copper construction: copper’s natural strength and resistance to corrosion provide stability and long-term reliability in hot and cold water lines.
  • NSF-listed for potable water: certified for drinking water applications, helping you meet safety standards and protect household health.
  • 1 count per package: ready-to-use in small repairs or installations without chasing multiple pieces.
  • High-rated performance: Maximum Working Pressure 408 and Maximum Working Temperature 400, giving confidence in demanding residential or light commercial projects.

Use cases and scenarios

  • Residential repairs where a larger copper run must be reduced to a smaller diameter without adding extra joints.
  • New installations in tight spaces where a compact reducing coupling simplifies the piping layout.
  • Potable water applications in DIY or professional plumbing projects that require a reliable copper-to-copper transition.

Why this NIBCO fitting stands out

  • Trusted NIBCO quality backed by durable copper construction and consistent performance.
  • NSF certification reinforces safety for drinking water systems, setting it apart from non-listed alternatives.
  • Designed for straightforward integration into existing copper networks with standard copper-fitting geometry (verify exact end sizes for your project).

Practical installation tips

  • Before purchasing, confirm the end sizes to ensure a proper fit for your copper piping—accurate sizing prevents leaks and rework.
  • Choose the appropriate connection method for your system (such as soldering or suitable compression methods) in accordance with local codes and manufacturer guidance.
  • Store and handle fittings in a dry environment to preserve the copper’s surface until installation.

The Details Specifications

Brand Nibco
SKU 40997
UPC 039923307668
Unit 0
Case Pack Quantity 10 per case
Retail Unit Quantity 1
Unit of Measure 0 0
Dimensions (L × W × H) 2 × 2 × 2
Weight 0 lbs
Cubic Feet 0.01157 ft³
Country of Origin USA
Safety Data Sheet (SDS) Manufacturer documentation · opens in new tab

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