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. 439-436
Mfr. Part No.1805 12 21
BrandLegris
SGD44.21
Each
units
- Coupler - 1/2 in BSPT Male Straight 1/2in BSPT -
RS Stock No. 439-666
Mfr. Part No.0101 06 13
BrandLegris
SGD5.114
Each (In a Pack of 5)
units
6mm Coupler Brass 1/4 in BSPP Male Straight 1/4in BSPP Male
RS Stock No. 295-2896
Mfr. Part No.1810 12 00
BrandLegris
SGD15.62
Each (In a Pack of 5)
units
- Sleeve Nut - M18 x 1.5 - M18 x 1.5 Metric -
RS Stock No. 234-9060
Mfr. Part No.WU8023
BrandWade
SGD10.63
Each (In a Pack of 2)
units
1/4in Equal Elbow Brass 1/4 in BSPT Male 90° 1/4in BSPT Male
RS Stock No. 432-4776
Mfr. Part No.4ET4-316
BrandParker
SGD36.97
Each
units
- Union - - Tee 7/16-20 - -
RS Stock No. 798-066
BrandRS PRO
SGD8.035
Each (In a Pack of 2)
units
15mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 285-8744
BrandRS PRO
SGD9.53
Each (In a Pack of 2)
units
15mm Tap Coupler Brass 1/2 in BSPP Female Straight 1/2in BSPP Female
RS Stock No. 293-6642
Mfr. Part No.0106 10 00
BrandLegris
SGD7.40
Each (In a Pack of 5)
units
10mm Equal End Coupler Brass - Straight - - -
RS Stock No. 231-4777
Mfr. Part No.0116 04 00
BrandLegris
SGD6.458
Each (In a Pack of 5)
units
4mm Bulkhead Coupler Brass - Straight - - -
RS Stock No. 231-5089
Mfr. Part No.1816 06 00
BrandLegris
SGD64.08
Each
units
- Coupler - - Straight - - -
RS Stock No. 295-2694
Mfr. Part No.1802 10 00
BrandLegris
SGD66.88
Each
units
- Elbow - - 90° - - -
RS Stock No. 439-543
Mfr. Part No.1806 12 00
BrandLegris
SGD59.29
Each
units
- Coupler - - Straight - - -
RS Stock No. 231-4941
Mfr. Part No.0105 12 21
BrandLegris
SGD9.112
Each (In a Pack of 5)
units
12mm Coupler Brass 1/2 in BSPT Male Straight 1/2in BSPT Male
RS Stock No. 432-4704
Mfr. Part No.SCM12-316
BrandParker
SGD41.41
Each
units
- Union - - Straight - - -
RS Stock No. 432-4906
Mfr. Part No.EEM12-316
BrandParker
SGD52.71
Each
units
- Elbow - - 90° - - -
RS Stock No. 432-0459
BrandRS PRO
SGD6.135
Each (In a Pack of 2)
units
15mm Coupler Brass 1/2 in BSP Male Elbow 1/2in BSP Male
RS Stock No. 369-1564
BrandRS PRO
SGD8.73
Each
units
15mm Coupler Brass - Straight - - -
RS Stock No. 234-8893
Mfr. Part No.WU4068/11
BrandWade
SGD14.165
Each (In a Pack of 2)
units
3/8in Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 439-830
Mfr. Part No.0104 06 00
BrandLegris
SGD7.36
Each (In a Pack of 5)
units
6mm Equal Tee Brass - - - - -
RS Stock No. 432-4760
Mfr. Part No.M12MSC1/2N-316
BrandParker
SGD28.79
Each
units
- Coupler - 1/2 in NPT Straight 1/2in NPT -