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. 432-4811
Mfr. Part No.ETM6-316
BrandParker
MYR109.39
Each
units
- Union - - Tee - - -
RS Stock No. 234-8893
Mfr. Part No.WU4068/11
BrandWade
MYR38.795
Each (In a Pack of 2)
units
3/8in Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 234-9149
Mfr. Part No.WU2051
BrandWade
MYR79.195
Each (In a Pack of 2)
units
1/2in Tee Brass - - - - -
RS Stock No. 295-2880
Mfr. Part No.1810 10 00
BrandLegris
MYR43.892
Each (In a Pack of 5)
units
- Sleeve Nut - M16 x 1.5 - M16 x 1.5 Metric -
RS Stock No. 439-925
Mfr. Part No.0106 08 00
BrandLegris
MYR14.90
Each (In a Pack of 5)
units
8mm Equal End Coupler Brass - Straight - - -
RS Stock No. 293-6591
Mfr. Part No.0109 16 21
BrandLegris
MYR57.968
Each (In a Pack of 5)
units
16mm Elbow Brass 1/2 in BSPT Male 90° 1/2in BSPT Male
RS Stock No. 295-2622
Mfr. Part No.1805 16 21
BrandLegris
MYR215.75
Each
units
- Coupler - 1/2 in BSPT Male Straight 1/2in BSPT -
RS Stock No. 432-4805
Mfr. Part No.8ET8-316
BrandParker
MYR212.84
Each
units
- Union - - Tee 3/4-20 - -
RS Stock No. 439-773
Mfr. Part No.0109 08 13
BrandLegris
MYR20.778
Each (In a Pack of 5)
units
8mm Elbow Brass 1/4 in BSPT Male 90° 1/4in BSPT Male
RS Stock No. 293-6490
Mfr. Part No.0101 15 21
BrandLegris
MYR60.082
Each (In a Pack of 5)
units
15mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 432-4990
Mfr. Part No.M12RUM6-316
BrandParker
MYR120.06
Each
units
- Reducer Union - - - - - -
RS Stock No. 432-4653
Mfr. Part No.4SC4-316
BrandParker
MYR57.19
Each
units
- Union - - Straight 7/16-20 - -
RS Stock No. 293-6585
Mfr. Part No.0109 12 17
BrandLegris
MYR36.27
Each (In a Pack of 5)
units
12mm Elbow Brass 3/8 in BSPT Male 90° 3/8in BSPT Male
RS Stock No. 234-8887
Mfr. Part No.WU1068
BrandWade
MYR35.465
Each (In a Pack of 2)
units
3/8in Coupler Brass 3/8 in BSPP Male Straight 3/8in BSPP Male
RS Stock No. 178-0074
Mfr. Part No.003635
BrandWatts
MYR187.15
Each
units
- - Brass - - M1 (Outlet) in, MF3/4 (Manifold) in - Female, Male
RS Stock No. 432-0465
Mfr. Part No.717018
MYR21.42
Each (In a Pack of 2)
units
22mm Coupler Brass 3/4 in BSP Male Elbow 3/4in BSP Male
RS Stock No. 432-4849
Mfr. Part No.4EE4-316
BrandParker
MYR93.76
Each
units
- Elbow - - 90° 7/16-20 - -