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. 225-7567
BrandRS PRO
TWD1,615.00
Each
units
42mm Deep Seal P Copper 1-1/2 in BSP Female - 1-1/2in BSP Female
RS Stock No. 295-2874
Mfr. Part No.1810 08 00
BrandLegris
TWD204.60
Each (In a Pack of 5)
units
- Sleeve Nut - M12 x 1 - M12 x 1 Metric -
RS Stock No. 439-931
Mfr. Part No.0106 12 00
BrandLegris
TWD218.40
Each (In a Pack of 5)
units
12mm Equal End Coupler Brass - Straight - - -
RS Stock No. 432-4811
Mfr. Part No.ETM6-316
BrandParker
TWD801.00
Each
units
- Union - - Tee - - -
RS Stock No. 432-0285
BrandRS PRO
TWD180.00
Each (In a Pack of 2)
units
10mm Coupler Brass 1/4 in BSPP Male Straight 1/4in BSPP Male
RS Stock No. 439-571
Mfr. Part No.1802 08 00
BrandLegris
TWD1,010.00
Each
units
- Elbow - - 90° - - -
RS Stock No. 439-408
Mfr. Part No.1805 08 10
BrandLegris
TWD529.00
Each
units
- Coupler - 1/8 in BSPT Male Straight 1/8in BSPT -
RS Stock No. 285-8744
BrandRS PRO
TWD204.50
Each (In a Pack of 2)
units
15mm Tap Coupler Brass 1/2 in BSPP Female Straight 1/2in BSPP Female
RS Stock No. 293-6614
Mfr. Part No.0104 10 00
BrandLegris
TWD232.00
Each (In a Pack of 5)
units
10mm Equal Tee Brass - - - - -
RS Stock No. 439-824
Mfr. Part No.0104 04 00
BrandLegris
TWD161.20
Each (In a Pack of 5)
units
4mm Equal Tee Brass - - - - -
RS Stock No. 234-9111
Mfr. Part No.WU2043
BrandWade
TWD231.00
Each (In a Pack of 2)
units
1/4in Tee Brass - - - - -
RS Stock No. 796-795
BrandRS PRO
TWD112.50
Each (In a Pack of 2)
units
10mm Coupler Brass 3/8 in BSPP Male Straight 3/8in BSPP Male
RS Stock No. 439-666
Mfr. Part No.0101 06 13
BrandLegris
TWD105.20
Each (In a Pack of 5)
units
6mm Coupler Brass 1/4 in BSPP Male Straight 1/4in BSPP Male
RS Stock No. 432-0279
BrandRS PRO
TWD139.00
Each (In a Pack of 2)
units
15 x 10mm Coupler Brass - Straight - - -
RS Stock No. 439-739
Mfr. Part No.0109 06 10
BrandLegris
TWD115.80
Each (In a Pack of 5)
units
6mm Elbow Brass 1/8 in BSPT Male 90° 1/8in BSPT Male
RS Stock No. 439-767
Mfr. Part No.0109 06 13
BrandLegris
TWD115.80
Each (In a Pack of 5)
units
6mm Elbow Brass 1/4 in BSPT Male 90° 1/4in BSPT Male
RS Stock No. 295-2880
Mfr. Part No.1810 10 00
BrandLegris
TWD283.00
Each (In a Pack of 5)
units
- Sleeve Nut - M16 x 1.5 - M16 x 1.5 Metric -
RS Stock No. 295-2593
Mfr. Part No.1805 10 17
BrandLegris
TWD731.00
Each
units
- Coupler - 3/8 in BSPT Male Straight 3/8in BSPT -
RS Stock No. 432-0291
BrandRS PRO
TWD118.00
Each (In a Pack of 2)
units
10mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
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