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. 432-4732
Mfr. Part No.8MSC8N-316
BrandParker
TWD626.00
Each
units
- Coupler - 1/2 in NPT Straight 1/2in NPT -
RS Stock No. 432-4675
Mfr. Part No.8SC8-316
BrandParker
TWD898.00
Each
units
- Union - - Straight 3/4-20 - -
RS Stock No. 234-8916
Mfr. Part No.WU7063
BrandWade
TWD172.50
Each (In a Pack of 2)
units
1/4in Coupler Brass 1/4 in BSPT Male Straight 1/4in BSPT Male
RS Stock No. 432-4861
Mfr. Part No.6EE6-316
BrandParker
TWD714.00
Each
units
- Elbow - - 90° 9/16-20 - -
RS Stock No. 432-0358
BrandRS PRO
TWD202.50
Each (In a Pack of 2)
units
28mm Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 432-0241
BrandRS PRO
TWD322.50
Each (In a Pack of 2)
units
28mm Coupler Brass - Straight - - -
RS Stock No. 369-1621
BrandRS PRO
TWD102.00
Each (In a Pack of 2)
units
15mm Coupler Brass - Elbow - - -
RS Stock No. 432-4697
Mfr. Part No.SCM10-316
BrandParker
TWD600.00
Each
units
- Union - - Straight - - -
RS Stock No. 295-2896
Mfr. Part No.1810 12 00
BrandLegris
TWD326.00
Each (In a Pack of 5)
units
- Sleeve Nut - M18 x 1.5 - M18 x 1.5 Metric -
RS Stock No. 285-8659
Mfr. Part No.7B4007
TWD101.50
Each (In a Pack of 2)
units
15mm Coupler Brass - Straight - - -
RS Stock No. 293-6709
Mfr. Part No.0105 15 21
BrandLegris
TWD241.60
Each (In a Pack of 5)
units
15mm Coupler Brass 1/2 in BSPT Male Straight 1/2in BSPT Male
RS Stock No. 432-4704
Mfr. Part No.SCM12-316
BrandParker
TWD898.00
Each
units
- Union - - Straight - - -
RS Stock No. 369-1643
BrandRS PRO
TWD165.50
Each (In a Pack of 2)
units
22mm Coupler Brass - Elbow - - -
RS Stock No. 439-767
Mfr. Part No.0109 06 13
BrandLegris
TWD115.80
Each (In a Pack of 5)
units
6mm Elbow Brass 1/4 in BSPT Male 90° 1/4in BSPT Male
RS Stock No. 439-414
Mfr. Part No.1805 06 13
BrandLegris
TWD544.00
Each
units
- Coupler - 1/4 in BSPT Male Straight 1/4in BSPT -
RS Stock No. 432-0342
BrandRS PRO
TWD193.00
Each (In a Pack of 2)
units
22mm Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 285-8665
BrandRS PRO
TWD202.50
Each (In a Pack of 2)
units
22mm Coupler Brass - Straight - - -
RS Stock No. 225-7551
BrandRS PRO
TWD1,550.00
Each
units
35mm Deep Seal P Copper 1-1/4 in BSP Female - 1-1/4in BSP Female
RS Stock No. 432-4760
Mfr. Part No.M12MSC1/2N-316
BrandParker
TWD624.00
Each
units
- Coupler - 1/2 in NPT Straight 1/2in NPT -
RS Stock No. 432-4899
Mfr. Part No.EEM10-316
BrandParker
TWD711.00
Each
units
- Elbow - - 90° - - -