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
TWD618.00
Each
units
- Coupler - 1/2 in NPT Straight 1/2in NPT -
RS Stock No. 432-4675
Mfr. Part No.8SC8-316
BrandParker
TWD886.00
Each
units
- Union - - Straight 3/4-20 - -
RS Stock No. 234-8916
Mfr. Part No.WU7063
BrandWade
TWD169.00
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. 432-4861
Mfr. Part No.6EE6-316
BrandParker
TWD701.00
Each
units
- Elbow - - 90° 9/16-20 - -
RS Stock No. 432-0241
BrandRS PRO
TWD322.50
Each (In a Pack of 2)
units
28mm Coupler Brass - Straight - - -
RS Stock No. 439-391
Mfr. Part No.1805 06 10
BrandLegris
TWD531.00
Each
units
- Coupler - 1/8 in BSPT Male Straight 1/8in BSPT -
RS Stock No. 432-0415
Mfr. Part No.721009
TWD532.00
Each (In a Pack of 2)
units
28mm Equal Tee Brass - - - - -
RS Stock No. 432-0421
BrandRS PRO
TWD374.00
Each (In a Pack of 2)
units
22 x 15 x 22mm Reducer Tee Brass - - - - -
RS Stock No. 285-8867
BrandRS PRO
TWD228.00
Each (In a Pack of 2)
units
22mm Coupler Brass - Elbow - - -
RS Stock No. 432-4899
Mfr. Part No.EEM10-316
BrandParker
TWD701.00
Each
units
- Elbow - - 90° - - -
RS Stock No. 439-458
Mfr. Part No.1809 06 10
BrandLegris
TWD827.00
Each
units
- Elbow - 1/8 in BSPT Male 90° 1/8in BSPT -
RS Stock No. 285-8873
BrandRS PRO
TWD700.00
Each
units
28mm Coupler Brass - Elbow - - -
RS Stock No. 231-5089
Mfr. Part No.1816 06 00
BrandLegris
TWD1,365.00
Each
units
- Coupler - - Straight - - -
RS Stock No. 432-4906
Mfr. Part No.EEM12-316
BrandParker
TWD1,127.00
Each
units
- Elbow - - 90° - - -
RS Stock No. 432-4805
Mfr. Part No.8ET8-316
BrandParker
TWD1,572.00
Each
units
- Union - - Tee 3/4-20 - -
RS Stock No. 293-6557
Mfr. Part No.0109 10 13
BrandLegris
TWD169.60
Each (In a Pack of 5)
units
10mm Elbow Brass 1/4 in BSPT Male 90° 1/4in BSPT Male
RS Stock No. 439-638
Mfr. Part No.0101 04 10
BrandLegris
TWD82.40
Each (In a Pack of 5)
units
4mm Coupler Brass 1/8 in BSPP Male Straight 1/8in BSPP Male
RS Stock No. 439-420
Mfr. Part No.1805 08 13
BrandLegris
TWD545.00
Each
units
- Coupler - 1/4 in BSPT Male Straight 1/4in BSPT -
RS Stock No. 293-6490
Mfr. Part No.0101 15 21
BrandLegris
TWD387.60
Each (In a Pack of 5)
units
15mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male