Compression Fittings

What are compression fittings?
Suitable for use in both commercial and residential applications, brass and copper compression fittings are an easy and practical plumbing method for both DIY and professional plumbers. Available in a variety of standard sizes each in different profiles such as straight connectors, 90-degree elbow, equal tee as well as reducing fittings from one size to another. Connecting copper pipe is easy with the range of fittings available with minimal effort.

How do compression fittings work?
Standard compression fittings are simple and easy to use fitting as simple as the name sounds. Made up of three basic pieces, a compression fitting uses a threaded nut with a hole in that tightens down to the compression fittings body. This tightens down over a small typically brass ring called an Olive that is placed between the nut and the body of the fitting. This olive is compressed by the tightening of the nut to the body creating a sealed joint.

What size do I need?
Always check the exact size of the pipe or fitting to be used when plumbing and a range of metric and imperial fittings are available and ensuring the correct size is selected is key to making an exact and well-sealed joint.

Using Compression Fittings
Most standard compression fittings just require two spanners to install, these can either be fixed or adjustable spanners used to tighten the fittings nut down for the best seal. PTFE tape may also be used over the fittings thread to give the best seal and limit the risk of leaking over time.

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Description Price Compression Connection Pipe Diameter Fitting Type Material Threaded Connection Fitting Direction Thread Size Thread Standard Gender
RS Stock No. 293-6579
Mfr. Part No.0109 12 13
BrandLegris
$13.762
Each (In a Pack of 5)
units
12mm Elbow Brass 1/4 in BSPT Male 90° 1/4in BSPT Male
RS Stock No. 439-622
Mfr. Part No.1804 12 00
BrandLegris
$109.26
Each
units
- Tee - - - - - -
RS Stock No. 432-4669
Mfr. Part No.6SC6-316
BrandParker
$27.93
Each
units
- Union - - Straight 9/16-20 - -
RS Stock No. 293-6585
Mfr. Part No.0109 12 17
BrandLegris
$11.088
Each (In a Pack of 5)
units
12mm Elbow Brass 3/8 in BSPT Male 90° 3/8in BSPT Male
RS Stock No. 295-2874
Mfr. Part No.1810 08 00
BrandLegris
$10.134
Each (In a Pack of 5)
units
- Sleeve Nut - M12 x 1 - M12 x 1 Metric -
RS Stock No. 439-543
Mfr. Part No.1806 12 00
BrandLegris
$88.09
Each
units
- Coupler - - Straight - - -
RS Stock No. 432-4653
Mfr. Part No.4SC4-316
BrandParker
$24.84
Each
units
- Union - - Straight 7/16-20 - -
RS Stock No. 432-4906
Mfr. Part No.EEM12-316
BrandParker
$60.09
Each
units
- Elbow - - 90° - - -
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