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Malleable iron 45 degree elbow with threaded ends

Value Brand

Value Brand 1-1/2" 45° Elbow Class 300 Malleable Iron

SKU CH-BK9K-ZMBG4

Malleable iron 45° elbow with FNPT threads, rated Class 300 for 1500 psi at 150 °F and 300 psi saturated steam from −20 °F to 550 °F

  • 45° angle redirects flow smoothly
  • Class 300 rating handles 1500 psi at 150°F
  • Malleable iron construction meets ASTM A197 and A47
  • FNPT threads comply with ASME B16.3 and B16.4
  • FM approved and UL listed for safety compliance

1-1/2" Malleable Iron Elbow

The ZORO SELECT 45-degree elbow is a Class 300 pipe fitting made from malleable iron for industrial plumbing systems. It connects via female NPT threads and meets ASME B16.3 and B16.4 standards alongside ASTM A197 and A47 material specifications. The fitting carries FM Approved and UL Listed certifications for code compliance.

Replaces lower-class or dissimilar-metal fittings

Install this elbow when a system requires Class 300 pressure containment at 1-1/2 inch nominal size. The jump is worth it when existing Class 150 components cannot handle the design pressure or when material compatibility demands malleable iron per ASTM A197. It directly substitutes any 45-degree FNPT elbow of the same size and class rating.

Rated for 1500 psi at 150°F

The fitting comfortably handles saturated steam service up to 300 psi and non-shock cold water, oil, or gas up to 1500 psi at 150°F. Its temperature range spans -20°F to 550°F, providing headroom for high-temperature condensate returns. It runs out beyond the 550°F upper limit or when system pressures exceed the Class 300 design envelope.

How it compares

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Price $16.99
Typical for this category: the median of 2,955 items is $17.99.

Specifications

Product
Brand nameZORO SELECT

Questions about this item

What size NPT threads does this 1-1/2" 45° elbow require for connection?

This fitting uses 1-1/2 inch FNPT threads on both ends. Clean threads thoroughly and apply suitable pipe sealant or tape before tightening to prevent leaks at the joint.

How should I orient and tighten this Class 300 malleable iron elbow during installation?

Align the 45-degree bend direction before final tightening. Use two wrenches — one on the elbow body and one on the pipe — to avoid over-stressing the FNPT threads and cracking the malleable iron casting.

When should I plan to replace this ASTM A197 elbow in a steam system?

Inspect regularly for corrosion, cracking or thread deformation, especially near the 300 psi saturated steam rating limit. Replace if visual checks reveal wall thinning, leaks at the FNPT joints, or after any over-pressure event.

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