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. 178-0077
Mfr. Part No.003638
BrandWatts
TWD1,899.00
Each
units
- - Brass - - M1 (Outlet) in, MF3/4 (Manifold) in - Female, Male
RS Stock No. 369-1615
BrandRS PRO
TWD152.00
Each (In a Pack of 2)
units
22mm End Stop Brass - - - - -
RS Stock No. 231-5089
Mfr. Part No.1816 06 00
BrandLegris
TWD1,365.00
Each
units
- Coupler - - 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. 285-8867
BrandRS PRO
TWD228.00
Each (In a Pack of 2)
units
22mm Coupler Brass - Elbow - - -
RS Stock No. 798-066
BrandRS PRO
TWD163.50
Each (In a Pack of 2)
units
15mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 231-4941
Mfr. Part No.0105 12 21
BrandLegris
TWD189.40
Each (In a Pack of 5)
units
12mm Coupler Brass 1/2 in BSPT Male Straight 1/2in BSPT Male
RS Stock No. 207-210
Mfr. Part No.1804 10 00
BrandLegris
TWD2,206.50
Each (In a Box of 2)
units
- Tee - - - - - -
RS Stock No. 432-0285
BrandRS PRO
TWD180.00
Each (In a Pack of 2)
units
10mm Coupler Brass 1/4 in BSPP Male Straight 1/4in BSPP Male
RS Stock No. 285-8716
BrandRS PRO
TWD124.00
Each (In a Pack of 2)
units
15mm Coupler Brass 1/2 in BSPP Female Straight 1/2in BSPP Female
RS Stock No. 178-0082
Mfr. Part No.141809
BrandWatts
TWD204.00
Each
units
- - Brass - - 1/2in - -
RS Stock No. 231-4985
Mfr. Part No.0105 10 13
BrandLegris
TWD102.40
Each (In a Pack of 5)
units
10mm Coupler Brass 1/4 in BSPT Male Straight 1/4in BSPT Male
RS Stock No. 432-4726
Mfr. Part No.6MSC6N-316
BrandParker
TWD438.00
Each
units
- Coupler - 3/8 in NPT Straight 3/8in NPT -
RS Stock No. 432-4849
Mfr. Part No.4EE4-316
BrandParker
TWD614.00
Each
units
- Elbow - - 90° 7/16-20 - -
RS Stock No. 178-0073
Mfr. Part No.003634
BrandWatts
TWD805.00
Each
units
- - Brass - - M1 (Outlet) in, MF3/4 (Manifold) in - Female, Male
RS Stock No. 295-2852
Mfr. Part No.1810 06 00
BrandLegris
TWD184.60
Each (In a Pack of 5)
units
- Sleeve Nut - M10 x 1 - M10 x 1 Metric -
RS Stock No. 178-0071
Mfr. Part No.003687
BrandWatts
TWD740.00
Each
units
- - Brass - - M1/2 (Outlet) in, MF3/4 (Manifold) in - Female, Male
RS Stock No. 234-9149
Mfr. Part No.WU2051
BrandWade
TWD576.50
Each (In a Pack of 2)
units
1/2in Tee Brass - - - - -
RS Stock No. 203-8603
BrandRS PRO
TWD915.00
Each
units
42mm Coupler Brass - Straight - - -
RS Stock No. 439-420
Mfr. Part No.1805 08 13
BrandLegris
TWD545.00
Each
units
- Coupler - 1/4 in BSPT Male Straight 1/4in BSPT -