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
SGD5.125
Each (In a Pack of 2)
units
15mm Coupler Brass 3/8 in BSPP Male Straight 3/8in BSPP Male
RS Stock No. 796-751
BrandRS PRO
SGD7.43
Each (In a Pack of 2)
units
12mm Coupler Brass - Straight - - -
RS Stock No. 432-0342
BrandRS PRO
SGD8.605
Each (In a Pack of 2)
units
22mm Coupler Brass 1 in BSPP Male Straight 1in BSPP Male
RS Stock No. 432-0291
BrandRS PRO
SGD5.26
Each (In a Pack of 2)
units
10mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 369-2286
BrandRS PRO
SGD4.43
Each (In a Pack of 2)
units
15mm Coupler Brass 1/2 in BSPP Female Straight 1/2in BSPP Female
RS Stock No. 285-8716
BrandRS PRO
SGD5.595
Each (In a Pack of 2)
units
15mm Coupler Brass 1/2 in BSPP Female Straight 1/2in BSPP Female
RS Stock No. 432-0443
BrandRS PRO
SGD11.99
Each (In a Pack of 2)
units
15mm Tap Adapter Brass - 90° 1/2in BSP -
RS Stock No. 369-1609
BrandRS PRO
SGD5.68
Each (In a Pack of 2)
units
15mm End Stop Brass - - - - -
RS Stock No. 285-8766
BrandRS PRO
SGD17.06
Each
units
15mm Tap Coupler Brass 1/2 in BSPP Female 90° 1/2in BSPP Female
RS Stock No. 225-7551
BrandRS PRO
SGD69.77
Each
units
35mm Deep Seal P Copper 1-1/4 in BSP Female - 1-1/4in BSP Female
RS Stock No. 285-8788
BrandRS PRO
SGD18.60
Each
units
15mm Wall Plate Elbow Adapter Brass 1/2 in BSPP Female 90° 1/2in BSPP Female
RS Stock No. 432-0336
BrandRS PRO
SGD5.87
Each (In a Pack of 2)
units
15mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 432-0364
BrandRS PRO
SGD19.07
Each
units
28mm Tank Coupler Brass - Straight - - -
RS Stock No. 285-8744
BrandRS PRO
SGD9.21
Each (In a Pack of 2)
units
15mm Tap Coupler Brass 1/2 in BSPP Female Straight 1/2in BSPP Female
RS Stock No. 798-088
BrandRS PRO
SGD11.86
Each
units
15mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 798-094
BrandRS PRO
SGD13.64
Each
units
22 x 22mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 798-066
BrandRS PRO
SGD7.355
Each (In a Pack of 2)
units
15mm Coupler Brass 3/4 in BSPP Male Straight 3/4in BSPP Male
RS Stock No. 432-0459
BrandRS PRO
SGD5.93
Each (In a Pack of 2)
units
15mm Coupler Brass 1/2 in BSP Male Elbow 1/2in BSP Male
RS Stock No. 369-1520
BrandRS PRO
SGD3.675
Each (In a Pack of 2)
units
15mm Coupler Brass - Straight - - -
RS Stock No. 432-0279
BrandRS PRO
SGD6.255
Each (In a Pack of 2)
units
15 x 10mm Coupler Brass - Straight - - -