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. 231-5023
Mfr. Part No.0105 12 17
BrandLegris
TWD178.40
Each (In a Pack of 5)
units
12mm Coupler Brass 3/8 in BSPT Male Straight 3/8in BSPT Male
RS Stock No. 295-2874
Mfr. Part No.1810 08 00
BrandLegris
TWD205.60
Each (In a Pack of 5)
units
- Sleeve Nut - M12 x 1 - M12 x 1 Metric -
RS Stock No. 432-4681
Mfr. Part No.SCM6-316
BrandParker
TWD415.00
Each
units
- Union - - Straight - - -
RS Stock No. 439-688
Mfr. Part No.0101 12 21
BrandLegris
TWD324.60
Each (In a Pack of 5)
units
12mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 432-4906
Mfr. Part No.EEM12-316
BrandParker
TWD1,127.00
Each
units
- Elbow - - 90° - - -
RS Stock No. 432-0336
BrandRS PRO
TWD130.00
Each (In a Pack of 2)
units
15mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 798-094
BrandRS PRO
TWD302.00
Each
units
22 x 22mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 293-6822
Mfr. Part No.0110 08 00
BrandLegris
TWD23.80
Each (In a Pack of 10)
units
8mm Nut Brass - - M12 x 1 - Female
RS Stock No. 439-745
Mfr. Part No.0109 08 10
BrandLegris
TWD127.40
Each (In a Pack of 5)
units
8mm Elbow Brass 1/8 in BSPT Male 90° 1/8in BSPT Male
RS Stock No. 439-666
Mfr. Part No.0101 06 13
BrandLegris
TWD103.80
Each (In a Pack of 5)
units
6mm Coupler Brass 1/4 in BSPP Male Straight 1/4in BSPP Male
RS Stock No. 178-0077
Mfr. Part No.003638
BrandWatts
TWD2,294.00
Each
units
- - Brass - - M1 (Outlet) in, MF3/4 (Manifold) in - Female, Male
RS Stock No. 796-896
BrandRS PRO
TWD114.00
Each (In a Pack of 2)
units
10mm Coupler Brass 3/8 in BSPP Female Straight 3/8in BSPP Female
RS Stock No. 439-565
Mfr. Part No.1802 06 00
BrandLegris
TWD1,028.00
Each
units
- Elbow - - 90° - - -
RS Stock No. 293-6692
Mfr. Part No.0105 08 10
BrandLegris
TWD66.40
Each (In a Pack of 5)
units
8mm Coupler Brass 1/8 in BSPT Male Straight 1/8in BSPT Male
RS Stock No. 439-919
Mfr. Part No.0106 06 00
BrandLegris
TWD85.20
Each (In a Pack of 5)
units
6mm Equal End Coupler Brass - Straight - - -
RS Stock No. 432-4827
Mfr. Part No.ETM10-316
BrandParker
TWD1,032.00
Each
units
- Union - - Tee - - -
RS Stock No. 295-2880
Mfr. Part No.1810 10 00
BrandLegris
TWD283.40
Each (In a Pack of 5)
units
- Sleeve Nut - M16 x 1.5 - M16 x 1.5 Metric -
RS Stock No. 439-852
Mfr. Part No.0104 12 00
BrandLegris
TWD340.00
Each (In a Pack of 5)
units
12mm Equal Tee Brass - - - - -
RS Stock No. 439-789
Mfr. Part No.0109 12 21
BrandLegris
TWD355.60
Each (In a Pack of 5)
units
12mm Elbow Brass 1/2 in BSPT Male 90° 1/2in BSPT Male
RS Stock No. 231-5001
Mfr. Part No.0105 10 21
BrandLegris
TWD158.40
Each (In a Pack of 5)
units
10mm Coupler Brass 1/2 in BSPT Male Straight 1/2in BSPT Male