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. 432-4732
Mfr. Part No.8MSC8N-316
BrandParker
TWD618.00
Each
units
- Coupler - 1/2 in NPT Straight 1/2in NPT -
RS Stock No. 432-4675
Mfr. Part No.8SC8-316
BrandParker
TWD886.00
Each
units
- Union - - Straight 3/4-20 - -
RS Stock No. 432-0358
BrandRS PRO
TWD199.50
Each (In a Pack of 2)
units
28mm Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 432-0241
BrandRS PRO
TWD321.00
Each (In a Pack of 2)
units
28mm Coupler Brass - Straight - - -
RS Stock No. 234-8916
Mfr. Part No.WU7063
BrandWade
TWD169.00
Each (In a Pack of 2)
units
1/4in Coupler Brass 1/4 in BSPT Male Straight 1/4in BSPT Male
RS Stock No. 432-4861
Mfr. Part No.6EE6-316
BrandParker
TWD701.00
Each
units
- Elbow - - 90° 9/16-20 - -
RS Stock No. 234-9105
Mfr. Part No.WU8031
BrandWade
TWD377.00
Each (In a Pack of 2)
units
1/2in Equal Elbow Brass 1/2 in BSPT Male 90° 1/2in BSPT Male
RS Stock No. 231-5017
Mfr. Part No.0105 12 13
BrandLegris
TWD173.20
Each (In a Pack of 5)
units
12mm Coupler Brass 1/4 in BSPT Male Straight 1/4in BSPT Male
RS Stock No. 234-9111
Mfr. Part No.WU2043
BrandWade
TWD205.50
Each (In a Pack of 2)
units
1/4in Tee Brass - - - - -
RS Stock No. 203-8625
BrandRS PRO
TWD1,302.00
Each
units
54mm Coupler Brass - Straight - - -
RS Stock No. 285-8766
BrandRS PRO
TWD378.00
Each
units
15mm Tap Coupler Brass 1/2 in BSPP Female 90° 1/2in BSPP Female
RS Stock No. 234-9133
Mfr. Part No.WU2048
BrandWade
TWD481.00
Each (In a Pack of 2)
units
3/8in Tee Brass - - - - -
RS Stock No. 178-0076
Mfr. Part No.003637
BrandWatts
TWD2,086.00
Each
units
- - Brass - - M1 (Outlet) in, MF3/4 (Manifold) in - Female, Male
RS Stock No. 369-1558
Mfr. Part No.711038
TWD105.00
Each (In a Pack of 2)
units
22mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
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. 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. 295-2852
Mfr. Part No.1810 06 00
BrandLegris
TWD188.60
Each (In a Pack of 5)
units
- Sleeve Nut - M10 x 1 - M10 x 1 Metric -
RS Stock No. 796-824
BrandRS PRO
TWD120.50
Each (In a Pack of 2)
units
12mm Coupler Brass 3/8 in BSPP Male Straight 3/8in BSPP Male
RS Stock No. 285-8687
BrandRS PRO
TWD104.00
Each (In a Pack of 2)
units
15mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 178-0072
Mfr. Part No.003633
BrandWatts
TWD620.00
Each
units
- - Brass - - M1 (Outlet) in, MF3/4 (Manifold) in - Female, Male