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
TWD627.00
Each
units
- Coupler - 1/2 in NPT Straight 1/2in NPT -
RS Stock No. 432-4675
Mfr. Part No.8SC8-316
BrandParker
TWD900.00
Each
units
- Union - - Straight 3/4-20 - -
RS Stock No. 432-0241
BrandRS PRO
TWD326.00
Each (In a Pack of 2)
units
28mm Coupler Brass - Straight - - -
RS Stock No. 432-4861
Mfr. Part No.6EE6-316
BrandParker
TWD712.00
Each
units
- Elbow - - 90° 9/16-20 - -
RS Stock No. 234-8916
Mfr. Part No.WU7063
BrandWade
TWD172.00
Each (In a Pack of 2)
units
1/4in Coupler Brass 1/4 in BSPT Male Straight 1/4in BSPT Male
RS Stock No. 432-0358
BrandRS PRO
TWD202.50
Each (In a Pack of 2)
units
28mm Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 439-931
Mfr. Part No.0106 12 00
BrandLegris
TWD223.20
Each (In a Pack of 5)
units
12mm Equal End Coupler Brass - Straight - - -
RS Stock No. 234-8966
Mfr. Part No.WU7068/3
BrandWade
TWD132.00
Each (In a Pack of 2)
units
3/8in Coupler Brass 1/4 in BSPT Male Straight 1/4in BSPT Male
RS Stock No. 285-8744
BrandRS PRO
TWD207.00
Each (In a Pack of 2)
units
15mm Tap Coupler Brass 1/2 in BSPP Female Straight 1/2in BSPP Female
RS Stock No. 231-4777
Mfr. Part No.0116 04 00
BrandLegris
TWD140.20
Each (In a Pack of 5)
units
4mm Bulkhead Coupler Brass - Straight - - -
RS Stock No. 234-8988
Mfr. Part No.WU7068/11
BrandWade
TWD301.00
Each (In a Pack of 2)
units
3/8in Coupler Brass 1/2 in BSPT Male Straight 1/2in BSPT Male
RS Stock No. 798-066
BrandRS PRO
TWD165.50
Each (In a Pack of 2)
units
15mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 432-0279
BrandRS PRO
TWD140.50
Each (In a Pack of 2)
units
15 x 10mm Coupler Brass - Straight - - -
RS Stock No. 231-4799
Mfr. Part No.0116 06 00
BrandLegris
TWD146.40
Each (In a Pack of 5)
units
6mm Bulkhead Coupler Brass - Straight - - -
RS Stock No. 432-4906
Mfr. Part No.EEM12-316
BrandParker
TWD1,145.00
Each
units
- Elbow - - 90° - - -
RS Stock No. 432-0421
BrandRS PRO
TWD379.50
Each (In a Pack of 2)
units
22 x 15 x 22mm Reducer Tee Brass - - - - -
RS Stock No. 234-9111
Mfr. Part No.WU2043
BrandWade
TWD209.00
Each (In a Pack of 2)
units
1/4in Tee Brass - - - - -
RS Stock No. 798-088
BrandRS PRO
TWD267.00
Each
units
15mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 178-0081
Mfr. Part No.141808
BrandWatts
TWD204.00
Each
units
- - Brass - - 1/2in - -
RS Stock No. 293-6579
Mfr. Part No.0109 12 13
BrandLegris
TWD229.20
Each (In a Pack of 5)
units
12mm Elbow Brass 1/4 in BSPT Male 90° 1/4in BSPT Male