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. 432-0285
BrandRS PRO
MYR23.985
Each (In a Pack of 2)
units
10mm Coupler Brass 1/4 in BSPP Male Straight 1/4in BSPP Male
RS Stock No. 369-1609
BrandRS PRO
MYR17.02
Each (In a Pack of 2)
units
15mm End Stop Brass - - - - -
RS Stock No. 285-8766
BrandRS PRO
MYR51.11
Each
units
15mm Tap Coupler Brass 1/2 in BSPP Female 90° 1/2in BSPP Female
RS Stock No. 432-0392
BrandRS PRO
MYR51.055
Each (In a Pack of 2)
units
28mm Elbow Brass - 90° - - -
RS Stock No. 432-0279
BrandRS PRO
MYR18.735
Each (In a Pack of 2)
units
15 x 10mm Coupler Brass - Straight - - -
RS Stock No. 285-8873
BrandRS PRO
MYR94.35
Each
units
28mm Coupler Brass - Elbow - - -
RS Stock No. 285-8889
BrandRS PRO
MYR25.19
Each (In a Pack of 2)
units
15 x 15 x 15mm Equal Tee Brass - - - - -
RS Stock No. 798-088
BrandRS PRO
MYR31.61
Each
units
15mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 369-1665
BrandRS PRO
MYR31.275
Each (In a Pack of 2)
units
22mm Equal Tee Brass - - - - -
RS Stock No. 203-8603
BrandRS PRO
MYR123.39
Each
units
42mm Coupler Brass - Straight - - -
RS Stock No. 796-751
BrandRS PRO
MYR22.255
Each (In a Pack of 2)
units
12mm Coupler Brass - Straight - - -
RS Stock No. 798-094
BrandRS PRO
MYR40.87
Each
units
22 x 22mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 798-066
BrandRS PRO
MYR21.55
Each (In a Pack of 2)
units
15mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 285-8968
BrandRS PRO
MYR165.77
Each
units
28 x 28 x 15mm Reducer Tee Brass - - - - -
RS Stock No. 369-1643
BrandRS PRO
MYR22.31
Each (In a Pack of 2)
units
22mm Coupler Brass - Elbow - - -
RS Stock No. 432-0421
BrandRS PRO
MYR50.60
Each (In a Pack of 2)
units
22 x 15 x 22mm Reducer Tee Brass - - - - -
RS Stock No. 285-8687
BrandRS PRO
MYR14.11
Each (In a Pack of 2)
units
15mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 369-1564
BrandRS PRO
MYR25.28
Each
units
15mm Coupler Brass - Straight - - -
RS Stock No. 796-824
BrandRS PRO
MYR16.315
Each (In a Pack of 2)
units
12mm Coupler Brass 3/8 in BSPP Male Straight 3/8in BSPP Male
RS Stock No. 234-8809
Mfr. Part No.WU1048
BrandWade
MYR30.115
Each (In a Pack of 2)
units
3/8in Coupler Brass - Straight - - -