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. 295-2880
Mfr. Part No.1810 10 00
BrandLegris
$16.054
Each (In a Pack of 5)
units
- Sleeve Nut - M16 x 1.5 - M16 x 1.5 Metric -
RS Stock No. 432-0291
BrandRS PRO
$6.14
Each (In a Pack of 2)
units
10mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 295-2896
Mfr. Part No.1810 12 00
BrandLegris
$17.838
Each (In a Pack of 5)
units
- Sleeve Nut - M18 x 1.5 - M18 x 1.5 Metric -
RS Stock No. 369-1665
BrandRS PRO
$11.795
Each (In a Pack of 2)
units
22mm Equal Tee Brass - - - - -
RS Stock No. 234-9010
Mfr. Part No.WU7071
BrandWade
$12.99
Each (In a Pack of 2)
units
1/2in Coupler Brass 1/2 in BSPT Male Straight 1/2in BSPT Male
RS Stock No. 432-0443
BrandRS PRO
$12.905
Each (In a Pack of 2)
units
15mm Tap Adapter Brass - 90° 1/2in BSP -
RS Stock No. 432-4732
Mfr. Part No.8MSC8N-316
BrandParker
$30.63
Each
units
- Coupler - 1/2 in NPT Straight 1/2in NPT -
RS Stock No. 432-0235
Mfr. Part No.709005
$8.845
Each (In a Pack of 2)
units
10mm Coupler Brass - Straight - - -
RS Stock No. 295-2622
Mfr. Part No.1805 16 21
BrandLegris
$67.75
Each
units
- Coupler - 1/2 in BSPT Male Straight 1/2in BSPT -
RS Stock No. 439-638
Mfr. Part No.0101 04 10
BrandLegris
$4.334
Each (In a Pack of 5)
units
4mm Coupler Brass 1/8 in BSPP Male Straight 1/8in BSPP Male
RS Stock No. 439-931
Mfr. Part No.0106 12 00
BrandLegris
$11.196
Each (In a Pack of 5)
units
12mm Equal End Coupler Brass - Straight - - -
RS Stock No. 285-8867
BrandRS PRO
$11.59
Each (In a Pack of 2)
units
22mm Coupler Brass - Elbow - - -
RS Stock No. 432-4827
Mfr. Part No.ETM10-316
BrandParker
$53.13
Each
units
- Union - - Tee - - -
RS Stock No. 432-4704
Mfr. Part No.SCM12-316
BrandParker
$47.60
Each
units
- Union - - Straight - - -
RS Stock No. 432-0279
BrandRS PRO
$6.73
Each (In a Pack of 2)
units
15 x 10mm Coupler Brass - Straight - - -
RS Stock No. 285-8845
BrandRS PRO
$6.635
Each (In a Pack of 2)
units
15mm Coupler Brass - Elbow - - -
RS Stock No. 432-0358
BrandRS PRO
$10.475
Each (In a Pack of 2)
units
28mm Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 231-4935
Mfr. Part No.0105 04 10
BrandLegris
$4.534
Each (In a Pack of 5)
units
4mm Coupler Brass 1/8 in BSPT Male Straight 1/8in BSPT Male
RS Stock No. 439-830
Mfr. Part No.0104 06 00
BrandLegris
$7.81
Each (In a Pack of 5)
units
6mm Equal Tee Brass - - - - -
RS Stock No. 285-8889
BrandRS PRO
$9.505
Each (In a Pack of 2)
units
15 x 15 x 15mm Equal Tee Brass - - - - -