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. 432-0320
BrandRS PRO
MYR15.22
Each (In a Pack of 2)
units
15mm Coupler Brass 3/8 in BSPP Male Straight 3/8in BSPP Male
RS Stock No. 432-0263
BrandRS PRO
MYR33.895
Each (In a Pack of 2)
units
22 x 15mm Coupler Brass - Straight - - -
RS Stock No. 285-8665
BrandRS PRO
MYR27.285
Each (In a Pack of 2)
units
22mm Coupler Brass - Straight - - -
RS Stock No. 432-0364
BrandRS PRO
MYR57.11
Each
units
28mm Tank Coupler Brass - Straight - - -
RS Stock No. 432-0342
BrandRS PRO
MYR25.785
Each (In a Pack of 2)
units
22mm Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 285-8788
BrandRS PRO
MYR55.72
Each
units
15mm Wall Plate Elbow Adapter Brass 1/2 in BSPP Female 90° 1/2in BSPP Female
RS Stock No. 796-802
BrandRS PRO
MYR16.07
Each (In a Pack of 2)
units
10mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 761-058
BrandRS PRO
MYR27.71
Each (In a Pack of 2)
units
10mm Coupler Brass 3/8 in BSP Female Elbow 3/8in BSP Female
RS Stock No. 203-8653
BrandRS PRO
MYR21.345
Each (In a Pack of 2)
units
15mm Coupler Brass 1/4 in BSPP Male Straight 1/4in BSPP Male
RS Stock No. 285-8845
BrandRS PRO
MYR17.59
Each (In a Pack of 2)
units
15mm Coupler Brass - Elbow - - -
RS Stock No. 432-0291
BrandRS PRO
MYR15.76
Each (In a Pack of 2)
units
10mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 432-0459
BrandRS PRO
MYR17.765
Each (In a Pack of 2)
units
15mm Coupler Brass 1/2 in BSP Male Elbow 1/2in BSP Male
RS Stock No. 761-086
BrandRS PRO
MYR56.085
Each (In a Pack of 2)
units
28mm Coupler Brass 1 in BSP Female Elbow 1in BSP Female
RS Stock No. 285-8902
BrandRS PRO
MYR165.59
Each
units
28 x 28 x 28mm Equal Tee Brass - - - - -
RS Stock No. 796-868
BrandRS PRO
MYR49.54
Each
units
28 mm x 1 in Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 432-0358
BrandRS PRO
MYR27.015
Each (In a Pack of 2)
units
28mm Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 285-8693
BrandRS PRO
MYR22.525
Each (In a Pack of 2)
units
22mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 796-795
BrandRS PRO
MYR14.975
Each (In a Pack of 2)
units
10mm Coupler Brass 3/8 in BSPP Male Straight 3/8in BSPP Male
RS Stock No. 285-8700
BrandRS PRO
MYR46.63
Each
units
28mm Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 285-8744
BrandRS PRO
MYR30.655
Each (In a Pack of 2)
units
15mm Tap Coupler Brass 1/2 in BSPP Female Straight 1/2in BSPP Female