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. 432-4760
Mfr. Part No.M12MSC1/2N-316
BrandParker
MYR83.35
Each
units
- Coupler - 1/2 in NPT Straight 1/2in NPT -
RS Stock No. 234-8821
Mfr. Part No.WU1063
BrandWade
MYR14.42
Each (In a Pack of 2)
units
1/4in Coupler Brass 1/4 in BSPP Male Straight 1/4in BSPP Male
RS Stock No. 439-492
Mfr. Part No.1809 08 13
BrandLegris
MYR115.84
Each
units
- Elbow - 1/4 in BSPT Male 90° 1/4in BSPT -
RS Stock No. 439-616
Mfr. Part No.1804 08 00
BrandLegris
MYR222.20
Each
units
- Tee - - - - - -
RS Stock No. 231-5001
Mfr. Part No.0105 10 21
BrandLegris
MYR24.528
Each (In a Pack of 5)
units
10mm Coupler Brass 1/2 in BSPT Male Straight 1/2in BSPT Male
RS Stock No. 439-666
Mfr. Part No.0101 06 13
BrandLegris
MYR16.068
Each (In a Pack of 5)
units
6mm Coupler Brass 1/4 in BSPP Male Straight 1/4in BSPP Male
RS Stock No. 440-060
Mfr. Part No.0165 08 10
BrandLegris
MYR10.258
Each (In a Pack of 5)
units
8mm Adapter Brass - Straight - - -
RS Stock No. 231-4806
Mfr. Part No.0116 08 00
BrandLegris
MYR25.022
Each (In a Pack of 5)
units
8mm Bulkhead Coupler Brass - Straight - - -
RS Stock No. 231-4799
Mfr. Part No.0116 06 00
BrandLegris
MYR22.316
Each (In a Pack of 5)
units
6mm Bulkhead Coupler Brass - Straight - - -
RS Stock No. 231-4985
Mfr. Part No.0105 10 13
BrandLegris
MYR15.642
Each (In a Pack of 5)
units
10mm Coupler Brass 1/4 in BSPT Male Straight 1/4in BSPT Male
RS Stock No. 439-622
Mfr. Part No.1804 12 00
BrandLegris
MYR241.43
Each
units
- Tee - - - - - -
RS Stock No. 439-903
Mfr. Part No.0106 04 00
BrandLegris
MYR12.112
Each (In a Pack of 5)
units
4mm Equal End Coupler Brass - Straight - - -
RS Stock No. 234-9133
Mfr. Part No.WU2048
BrandWade
MYR56.495
Each (In a Pack of 2)
units
3/8in Tee Brass - - - - -
RS Stock No. 439-688
Mfr. Part No.0101 12 21
BrandLegris
MYR50.264
Each (In a Pack of 5)
units
12mm Coupler Brass 1/2 in BSPP Male Straight 1/2in BSPP Male
RS Stock No. 231-4991
Mfr. Part No.0105 10 17
BrandLegris
MYR16.862
Each (In a Pack of 5)
units
10mm Coupler Brass 3/8 in BSPT Male Straight 3/8in BSPT Male
RS Stock No. 439-846
Mfr. Part No.0104 08 00
BrandLegris
MYR26.808
Each (In a Pack of 5)
units
8mm Equal Tee Brass - - - - -
RS Stock No. 369-1659
Mfr. Part No.721007
MYR16.935
Each (In a Pack of 2)
units
15mm Equal Tee Brass - - - - -
RS Stock No. 439-751
Mfr. Part No.0109 04 13
BrandLegris
MYR18.636
Each (In a Pack of 5)
units
4mm Elbow Brass 1/4 in BSPT Male 90° 1/4in BSPT Male
RS Stock No. 432-4726
Mfr. Part No.6MSC6N-316
BrandParker
MYR58.56
Each
units
- Coupler - 3/8 in NPT Straight 3/8in NPT -
RS Stock No. 439-565
Mfr. Part No.1802 06 00
BrandLegris
MYR159.10
Each
units
- Elbow - - 90° - - -