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Bronze 90-degree elbow coupling with cup and FNPT ends

Nibco, Inc.

Nibco, Inc. 707-3-LF 3/8 in Bronze 90 Degree Elbow Coupling

SKU CH-S8QG-MDYC6

Bronze 90-degree elbow coupling joins 3/8 in copper tube to 3/8 in FNPT for potable water at up to 623 psi and 200 Degrees F

  • Suitable for potable water systems backed by NSF/ANSI 61 and NSF/ANSI 372 certification
  • Handles high pressure demands with a 623 psi maximum operating rating
  • Withstands hot water lines up to 200 degrees F maximum operating temperature
  • Connects copper tube to female NPT threads using a 90 degree sweat elbow configuration
  • Manufactured to ASME B 16.18 and ISO 9001 standards from C87850 bronze grade

Potable-water bronze elbow

This 3/8-inch sweat-to-FNPT elbow is made from C87850 bronze and meets NSF/ANSI 61 and 372 for drinking-water systems. It carries a 623 psi pressure rating and a 200 °F temperature limit under ASME B 16.18. The 90-degree turn connects a 1/2-inch copper tube to a 3/8-inch female pipe thread in a single fitting.

Copper-to-thread transition

The fitting replaces a separate sweat coupling and threaded adapter when joining copper tubing to threaded valves or equipment. It is worth the change whenever a leak-free, code-compliant joint is required without adding extra connections. The cup end solders directly to Type K, L or M copper while the FNPT end accepts standard pipe threads.

Compact high-pressure joint

The bronze body handles continuous pressure up to 623 psi and hot water up to 200 °F, covering most residential and light-commercial potable lines. It runs out of headroom in high-rise boosted systems exceeding the pressure rating or in steam service above the temperature limit. The 90-degree radius keeps flow restriction low for short-radius layout needs.

How it compares

Measured against everything we stock in Hose Fittings, Adapters & Clamps, at today’s prices. Recalculated every night.

Price $8.99
Cheaper than about 73% of the 2,955 comparable items (median $17.99).

Specifications

Product
Brand nameNIBCO

Questions about this item

What size copper tube and thread does the 3/8 in bronze 90-degree elbow accept?

Side A takes a 3/8 in copper tube (1/2 in OD) for sweat connection, and Side B provides a 3/8 in FNPT thread for pipe.

How do I install the sweat end without overheating the bronze body?

Clean the tube, apply flux, heat the cup evenly until solder flows, then remove heat immediately — prolonged flame can weaken the joint or damage the C87850 bronze.

When should I inspect or replace this elbow in a potable-water system?

Check for leaks, corrosion or stress cracks during routine plumbing inspections; replace if the joint weeps or the bronze shows dezincification after long service at up to 200 Degrees F and 623 psi.

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