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. 432-4833
Mfr. Part No.ETM12-316
BrandParker
MYR227.78
Each
units
- Union - - Tee - - -
RS Stock No. 432-4748
Mfr. Part No.M6MSC1/4N-316
BrandParker
MYR33.67
Each
units
- Coupler - 1/4 in NPT Straight 1/4in NPT -
RS Stock No. 432-4681
Mfr. Part No.SCM6-316
BrandParker
MYR47.84
Each
units
- Union - - Straight - - -
RS Stock No. 432-4710
Mfr. Part No.4MSC4N-316
BrandParker
MYR38.75
Each
units
- Coupler - 1/4 in NPT Straight 1/4in NPT -
RS Stock No. 432-4760
Mfr. Part No.M12MSC1/2N-316
BrandParker
MYR71.06
Each
units
- Coupler - 1/2 in NPT Straight 1/2in NPT -
RS Stock No. 432-4675
Mfr. Part No.8SC8-316
BrandParker
MYR102.05
Each
units
- Union - - Straight 3/4-20 - -
RS Stock No. 432-4697
Mfr. Part No.SCM10-316
BrandParker
MYR68.22
Each
units
- Union - - Straight - - -
RS Stock No. 432-4726
Mfr. Part No.6MSC6N-316
BrandParker
MYR52.91
Each
units
- Coupler - 3/8 in NPT Straight 3/8in NPT -
RS Stock No. 432-4704
Mfr. Part No.SCM12-316
BrandParker
MYR102.05
Each
units
- Union - - Straight - - -
RS Stock No. 432-4669
Mfr. Part No.6SC6-316
BrandParker
MYR66.93
Each
units
- Union - - Straight 9/16-20 - -
RS Stock No. 432-4883
Mfr. Part No.EEM6-316
BrandParker
MYR69.12
Each
units
- Elbow - - 90° - - -
RS Stock No. 432-4805
Mfr. Part No.8ET8-316
BrandParker
MYR195.54
Each
units
- Union - - Tee 3/4-20 - -
RS Stock No. 432-4906
Mfr. Part No.EEM12-316
BrandParker
MYR140.15
Each
units
- Elbow - - 90° - - -
RS Stock No. 432-4877
Mfr. Part No.8EE8-316
BrandParker
MYR163.36
Each
units
- Elbow - - 90° 3/4-20 - -
RS Stock No. 432-4732
Mfr. Part No.8MSC8N-316
BrandParker
MYR75.54
Each
units
- Coupler - 1/2 in NPT Straight 1/2in NPT -
RS Stock No. 432-4861
Mfr. Part No.6EE6-316
BrandParker
MYR101.57
Each
units
- Elbow - - 90° 9/16-20 - -
RS Stock No. 432-4827
Mfr. Part No.ETM10-316
BrandParker
MYR128.35
Each
units
- Union - - Tee - - -
RS Stock No. 432-4899
Mfr. Part No.EEM10-316
BrandParker
MYR86.24
Each
units
- Elbow - - 90° - - -
RS Stock No. 432-4776
Mfr. Part No.4ET4-316
BrandParker
MYR104.27
Each
units
- Union - - Tee 7/16-20 - -
RS Stock No. 432-4653
Mfr. Part No.4SC4-316
BrandParker
MYR63.81
Each
units
- Union - - Straight 7/16-20 - -