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. 432-4861
Mfr. Part No.6EE6-316
BrandParker
TWD701.00
Each
units
- Elbow - - 90° 9/16-20 - -
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. 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. 432-4883
Mfr. Part No.EEM6-316
BrandParker
TWD562.00
Each
units
- Elbow - - 90° - - -
RS Stock No. 796-868
BrandRS PRO
TWD366.00
Each
units
28 mm x 1 in Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 432-0342
BrandRS PRO
TWD190.50
Each (In a Pack of 2)
units
22mm Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 369-2286
BrandRS PRO
TWD98.00
Each (In a Pack of 2)
units
15mm Coupler Brass 1/2 in BSPP Female Straight 1/2in BSPP Female
RS Stock No. 285-8902
BrandRS PRO
TWD1,223.00
Each
units
28 x 28 x 28mm Equal Tee Brass - - - - -
RS Stock No. 432-4849
Mfr. Part No.4EE4-316
BrandParker
TWD606.00
Each
units
- Elbow - - 90° 7/16-20 - -
RS Stock No. 432-4748
Mfr. Part No.M6MSC1/4N-316
BrandParker
TWD275.00
Each
units
- Coupler - 1/4 in NPT Straight 1/4in NPT -
RS Stock No. 439-767
Mfr. Part No.0109 06 13
BrandLegris
TWD114.40
Each (In a Pack of 5)
units
6mm Elbow Brass 1/4 in BSPT Male 90° 1/4in BSPT Male
RS Stock No. 293-6591
Mfr. Part No.0109 16 21
BrandLegris
TWD374.40
Each (In a Pack of 5)
units
16mm Elbow Brass 1/2 in BSPT Male 90° 1/2in BSPT Male
RS Stock No. 231-4806
Mfr. Part No.0116 08 00
BrandLegris
TWD161.60
Each (In a Pack of 5)
units
8mm Bulkhead Coupler Brass - Straight - - -
RS Stock No. 178-0069
Mfr. Part No.003685
BrandWatts
TWD460.00
Each
units
- - Brass - - M1/2 (Outlet) in, MF3/4 (Manifold) in - Female, Male
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