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. 439-896
Mfr. Part No.0102 12 00
BrandLegris
TWD343.20
Each (In a Pack of 5)
units
12mm Equal Elbow Brass - 90° - - -
RS Stock No. 369-1621
BrandRS PRO
TWD100.00
Each (In a Pack of 2)
units
15mm Coupler Brass - Elbow - - -
RS Stock No. 293-6642
Mfr. Part No.0106 10 00
BrandLegris
TWD154.80
Each (In a Pack of 5)
units
10mm Equal End Coupler Brass - Straight - - -
RS Stock No. 231-4799
Mfr. Part No.0116 06 00
BrandLegris
TWD144.20
Each (In a Pack of 5)
units
6mm Bulkhead Coupler Brass - Straight - - -
RS Stock No. 432-0500
Mfr. Part No.720038
TWD218.00
Each (In a Pack of 2)
units
22mm Coupler Brass 3/4 in BSPP Female Elbow 3/4in BSPP Female
RS Stock No. 432-4899
Mfr. Part No.EEM10-316
BrandParker
TWD701.00
Each
units
- Elbow - - 90° - - -
RS Stock No. 285-8693
BrandRS PRO
TWD166.50
Each (In a Pack of 2)
units
22mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 369-1586
BrandRS PRO
TWD214.00
Each
units
22mm Coupler Brass - Straight - - -
RS Stock No. 432-4704
Mfr. Part No.SCM12-316
BrandParker
TWD886.00
Each
units
- Union - - Straight - - -
RS Stock No. 178-0073
Mfr. Part No.003634
BrandWatts
TWD952.00
Each
units
- - Brass - - M1 (Outlet) in, MF3/4 (Manifold) in - Female, Male
RS Stock No. 369-1609
BrandRS PRO
TWD125.50
Each (In a Pack of 2)
units
15mm End Stop Brass - - - - -
RS Stock No. 369-1659
Mfr. Part No.721007
TWD122.50
Each (In a Pack of 2)
units
15mm Equal Tee Brass - - - - -
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. 293-6557
Mfr. Part No.0109 10 13
BrandLegris
TWD169.80
Each (In a Pack of 5)
units
10mm Elbow Brass 1/4 in BSPT Male 90° 1/4in 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. 432-4710
Mfr. Part No.4MSC4N-316
BrandParker
TWD270.00
Each
units
- Coupler - 1/4 in NPT Straight 1/4in NPT -
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. 432-4990
Mfr. Part No.M12RUM6-316
BrandParker
TWD887.00
Each
units
- Reducer Union - - - - - -
RS Stock No. 295-2896
Mfr. Part No.1810 12 00
BrandLegris
TWD332.80
Each (In a Pack of 5)
units
- Sleeve Nut - M18 x 1.5 - M18 x 1.5 Metric -
RS Stock No. 285-8845
BrandRS PRO
TWD130.00
Each (In a Pack of 2)
units
15mm Coupler Brass - Elbow - - -