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. 234-8809
Mfr. Part No.WU1048
BrandWade
MYR32.085
Each (In a Pack of 2)
units
3/8in Coupler Brass - Straight - - -
RS Stock No. 293-6557
Mfr. Part No.0109 10 13
BrandLegris
MYR25.026
Each (In a Pack of 5)
units
10mm Elbow Brass 1/4 in BSPT Male 90° 1/4in BSPT Male
RS Stock No. 432-4833
Mfr. Part No.ETM12-316
BrandParker
MYR236.49
Each
units
- Union - - Tee - - -
RS Stock No. 231-4957
Mfr. Part No.0105 06 10
BrandLegris
MYR9.182
Each (In a Pack of 5)
units
6mm Coupler Brass 1/8 in BSPT Male Straight 1/8in BSPT Male
RS Stock No. 234-8988
Mfr. Part No.WU7068/11
BrandWade
MYR44.59
Each (In a Pack of 2)
units
3/8in Coupler Brass 1/2 in BSPT Male Straight 1/2in BSPT Male
RS Stock No. 439-571
Mfr. Part No.1802 08 00
BrandLegris
MYR149.75
Each
units
- Elbow - - 90° - - -
RS Stock No. 231-5023
Mfr. Part No.0105 12 17
BrandLegris
MYR26.584
Each (In a Pack of 5)
units
12mm Coupler Brass 3/8 in BSPT Male Straight 3/8in BSPT Male
RS Stock No. 231-5017
Mfr. Part No.0105 12 13
BrandLegris
MYR25.534
Each (In a Pack of 5)
units
12mm Coupler Brass 1/4 in BSPT Male Straight 1/4in BSPT Male
RS Stock No. 439-391
Mfr. Part No.1805 06 10
BrandLegris
MYR78.78
Each
units
- Coupler - 1/8 in BSPT Male Straight 1/8in BSPT -
RS Stock No. 369-1558
Mfr. Part No.711038
MYR15.775
Each (In a Pack of 2)
units
22mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 432-0320
BrandRS PRO
MYR16.91
Each (In a Pack of 2)
units
15mm Coupler Brass 3/8 in BSPP Male Straight 3/8in BSPP Male
RS Stock No. 432-0263
BrandRS PRO
MYR37.66
Each (In a Pack of 2)
units
22 x 15mm Coupler Brass - Straight - - -
RS Stock No. 231-4935
Mfr. Part No.0105 04 10
BrandLegris
MYR9.178
Each (In a Pack of 5)
units
4mm Coupler Brass 1/8 in BSPT Male Straight 1/8in BSPT Male
RS Stock No. 231-4963
Mfr. Part No.0105 06 13
BrandLegris
MYR9.752
Each (In a Pack of 5)
units
6mm Coupler Brass 1/4 in BSPT Male Straight 1/4in BSPT Male
RS Stock No. 293-6692
Mfr. Part No.0105 08 10
BrandLegris
MYR9.792
Each (In a Pack of 5)
units
8mm Coupler Brass 1/8 in BSPT Male Straight 1/8in BSPT Male
RS Stock No. 432-4760
Mfr. Part No.M12MSC1/2N-316
BrandParker
MYR92.61
Each
units
- Coupler - 1/2 in NPT Straight 1/2in NPT -
RS Stock No. 439-492
Mfr. Part No.1809 08 13
BrandLegris
MYR110.33
Each
units
- Elbow - 1/4 in BSPT Male 90° 1/4in BSPT -
RS Stock No. 234-8821
Mfr. Part No.WU1063
BrandWade
MYR14.01
Each (In a Pack of 2)
units
1/4in Coupler Brass 1/4 in BSPP Male Straight 1/4in BSPP Male
RS Stock No. 285-8665
BrandRS PRO
MYR30.315
Each (In a Pack of 2)
units
22mm Coupler Brass - Straight - - -
RS Stock No. 231-4941
Mfr. Part No.0105 12 21
BrandLegris
MYR28.108
Each (In a Pack of 5)
units
12mm Coupler Brass 1/2 in BSPT Male Straight 1/2in BSPT Male