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  • Stainless Steel 316 Cast Pipe Fitting, Union, Class 150, NPT Female
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Stainless Steel 316 Cast Pipe Fitting, Union, Class 150, NPT Female

Available in multiple versions

6 customer reviews

Price: $3.52 - $135.00
Product Specifications
Material Type Stainless Steel
Specification Met ISO 49 ANSI B1.20.1
System of Measurement Inch
Grade 316
Pressure Rating Class 150
Shape Union
Style Name Threaded
UNSPSC Code 40170000

The Merit Brass union is a class 150 stainless steel 316 cast pipe fitting... Read full product description



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1" 1 B003GSL4SK
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$45.80
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1-1/2" 1 B003GSL4TY
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$20.00
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1-1/4" 1 B003GSL4TE
In Stock (8)
$56.24
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1/2 inches 25 B00N9TUPYA
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$135.00
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1/2" 1 B003GSL4RQ
In Stock (57)
$5.40
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1/4" 1 B003GSL4QW
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$4.78
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1/8" 1 B003GSL4PS
In Stock (23)
$3.52
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2" 1 B003GSL4UI
In Stock (10)
$24.00
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2-1/2" 1 B003GSL4VC
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$36.82
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3" 1 B003GSL4VM
In Stock (3)
$84.95
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3/4" 1 B003GSL4SA
In Stock (48)
$6.80
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3/8" 1 B003GSL4R6
In Stock (11)
$21.43
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4" 1 B003GSL4WG
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$86.16
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Product Features

  • Union for connecting and extending two male pipes
  • Female National Pipe Taper (NPT) threads on both ends for connecting two male threaded pipes
  • Made from stainless steel 316 for strength
  • Higher corrosion resistance than stainless steel 304
  • Meets standards ANSI B1.20.1 and ISO 49 for quality assurance

Product Details

  • Shipping Information: View shipping rates and policies
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B004XEKR7U
  • Average Customer Review: 4.9 out of 5 stars  See all reviews (6 customer reviews)
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Product Description

The Merit Brass union is a class 150 stainless steel 316 cast pipe fitting with female National Pipe Taper (NPT) threads for connecting and extending two male threaded pipes. The union has three pieces and includes a threaded connection that can be screwed or unscrewed to connect or disconnect pipes more easily than couplings. It has NPT threads on both ends for connecting to pipes with tighter seals than straight threads. This union is made of stainless steel 316, which is higher strength and more corrosion resistant than stainless steel 304. This class 150 fitting meets standards ANSI B1.20.1 and ISO 49 for quality assurance. Class is a standard relating to tolerance, construction, dimension, and wall thickness, but it is not a direct measurement of maximum working pressure.

Pipe fittings are components used for connecting, terminating, controlling flow, and changing the direction of piping in many different industries. When purchasing pipe fittings, consider the application, as this will affect material type, shape, size and required durability. Fittings are available threaded or unthreaded, in many shapes, styles, sizes, and schedules (pipe wall thickness).

Merit Brass manufactures pipe nipples following ISO 9001 standards for quality assurance. The company, family-owned since 1937 and headquartered in Cleveland, OH, distributes pipe fittings in the United States and Canada.


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Customer Reviews

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Most Helpful Customer Reviews

Size: 1/2"Number of Items: 1 Verified Purchase
Stainless Steel 316 Cast Pipe Fitting, Union, Class 150, 1/2" NPT Female

The real world test of a union is whether it leaks. The mating surfaces of the two halves are highly polished and mesh perfectly. I installed this one in the exposed plumbing for a master bath urinal (fairly close color to the adjoining chrome pipes), and it's been leak free. For a leak-free joint used this stuff on all male & female threads: Rectorseal 23631 1/4 Pint Brush Top T Plus 2 Pipe Thread SealantThis union is very high quality, of the best stainless (type 316) made for plumbing, and leak free..
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Of course, made in China for those wondering. I would definitely not describe them as "thick", but I was only familiar with forged unions, which make these look like toys. The appearance and fit, however, are satisfactory. I had a very light duty use for these, so I was mainly interested in resistance to corrosion, so only time will tell. My main concern was their magnetic properties when I tested them, expecting 316 stainless steel to be non-magnetic. However, I have read that it is possible that cast fittings can indeed be magnetic, so only a metallurgist would know for certain.
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By Rick on May 2, 2014
Size: 1/2"Number of Items: 1 Verified Purchase
This is an excellent stainless steel union as it is very thick and sturdy where the threads are very clean and the interior mating surfaces are polished. It measures 1 5/8" long and 1 5/8" in diameter. I'm very happy with it!
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