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. 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. 432-4861
Mfr. Part No.6EE6-316
BrandParker
TWD714.00
Each
units
- Elbow - - 90° 9/16-20 - -
RS Stock No. 432-0241
BrandRS PRO
TWD322.50
Each (In a Pack of 2)
units
28mm Coupler Brass - Straight - - -
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. 295-2622
Mfr. Part No.1805 16 21
BrandLegris
TWD1,385.00
Each
units
- Coupler - 1/2 in BSPT Male Straight 1/2in BSPT -
RS Stock No. 295-2874
Mfr. Part No.1810 08 00
BrandLegris
TWD204.60
Each (In a Pack of 5)
units
- Sleeve Nut - M12 x 1 - M12 x 1 Metric -
RS Stock No. 293-6800
Mfr. Part No.0110 04 00
BrandLegris
TWD14.10
Each (In a Pack of 10)
units
4mm Nut Brass - - M8 x 1 Metric Female
RS Stock No. 295-2880
Mfr. Part No.1810 10 00
BrandLegris
TWD283.00
Each (In a Pack of 5)
units
- Sleeve Nut - M16 x 1.5 - M16 x 1.5 Metric -
RS Stock No. 295-2672
Mfr. Part No.1806 10 00
BrandLegris
TWD1,042.00
Each
units
- Coupler - - Straight - - -
RS Stock No. 285-8902
BrandRS PRO
TWD1,228.00
Each
units
28 x 28 x 28mm Equal Tee Brass - - - - -
RS Stock No. 178-0068
Mfr. Part No.003684
BrandWatts
TWD350.00
Each
units
- - Brass - - M1/2 (Outlet) in, MF3/4 (Manifold) in - Female, Male
RS Stock No. 369-1586
BrandRS PRO
TWD215.00
Each
units
22mm Coupler Brass - Straight - - -
RS Stock No. 439-521
Mfr. Part No.1806 06 00
BrandLegris
TWD781.00
Each
units
- Coupler - - Straight - - -
RS Stock No. 231-5089
Mfr. Part No.1816 06 00
BrandLegris
TWD1,365.00
Each
units
- Coupler - - Straight - - -
RS Stock No. 295-2638
Mfr. Part No.1809 10 13
BrandLegris
TWD1,027.00
Each
units
- Elbow - 1/4 in BSPT Male 90° 1/4in BSPT -
RS Stock No. 293-6816
Mfr. Part No.0110 06 00
BrandLegris
TWD17.10
Each (In a Pack of 10)
units
6mm Nut Brass - - M10 x 1 - Female
RS Stock No. 432-4697
Mfr. Part No.SCM10-316
BrandParker
TWD600.00
Each
units
- Union - - Straight - - -
RS Stock No. 285-8952
BrandRS PRO
TWD457.00
Each
units
22 x 22 x 15mm Reducer Tee Brass - - - - -