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Hexagonal red brass reducing coupling with threaded ends

Value Brand

Value Brand 1/2" x 3/8" FNPT Red Brass Reducing Coupling

SKU CH-65MD-MZ3BY

Red brass reducing coupling connects 1/2 inch to 3/8 inch FNPT threads, rated 125 psi from -20 to 400 degrees F and meets ASTM B584 and ASME B16.15 standards

  • Red brass construction resists corrosion for long service life
  • FNPT threads create a secure, leak-tight joint
  • Reduces 1/2" to 3/8" pipe in one fitting
  • Rated 125 psi at temperatures up to 400°F
  • Meets ASTM B584 and ASME B16.15 standards

Application and user

This reducing coupling joins a 1/2 inch FNPT pipe to a 3/8 inch FNPT pipe in plumbing systems. It suits installers who need a durable brass transition between different pipe diameters. The red brass construction meets ASTM B584 and ASME B16.15 standards for potable water and hydronic use.

Installation checks

Verify that both mating threads are FNPT and match the 1/2 inch and 3/8 inch nominal sizes exactly. Confirm the system design pressure stays within the 125 psi rating and the operating temperature remains between -20 and 400 degrees Fahrenheit. Ensure local codes accept Class 125 red brass fittings for the intended service.

Build quality and daily use

The red brass body resists dezincification and corrosion in hot or cold water loops. Threads conform to ANSI B1.20.1 for reliable sealing with standard pipe dope or tape. The coupling contains chemicals identified under California Proposition 65 as causing cancer and reproductive harm, so handle with gloves and wash hands after installation.

How it compares

Measured against everything we stock in Bath Accessories & Soap Dispensers, at today’s prices. Recalculated every night.

Price $5.99
Cheaper than about 95% of the 1,499 comparable items (median $39.99).

Specifications

Product
Brand nameZORO SELECT
Product typeOther

Questions about this item

Does the box include any pipe sealant or thread tape, or must I buy those separately?

The coupling is supplied alone; thread sealant or PTFE tape is not included and must be purchased separately.

Should I choose a different fitting if my system runs above 125 psi?

This coupling is rated to 125 psi maximum; for higher pressures select a fitting with a higher pressure class.

What does the 400 °F upper temperature rating mean when the valve is installed in a hot-water loop?

It indicates the brass body can withstand continuous water temperatures up to 400 °F without degrading.

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