Our Location

Witbank, Mpumalanga | Johannesburg,  Gauteng | Cape Town, Western Cape

Call Us

Corrie: +27 71 202 3016 | Quinn: +27 82 468 8549
Mike: +27 72 800 2381 | Craig: +27 82 446 4475

Compression Fittings

About Rendifield Compression fittings

Compression fittings are designed to operate up to 1600 kPa constant working pressure and are suitable for fitting to High-Density Polypropylene, uPVC, and Polyethylene piping to metric ISO sizes. The fittings are suitable for potable water as well as most common fluids in pipelines. The fittings have approval for use by South African Government departments and municipalities. These fittings are available in sizes from 16 – 110mm and have a maximum operating the pressure of 16 bar.

RENDIFIELD MINING AND INDUSTRIAL PIPING SOLUTIONS is renowned for quality products and services. Our compression fittings comply with the requirements of a number of Australian specifications and, in South Africa, have a Certificate of Acceptance from JASWIC.  The RENDIFIELD MINING AND INDUSTRIAL PIPING SOLUTIONS fitting design uses the mechanical advantage of the nut thread to place the seal into a compressed position. This means no resistance when inserting the pipe into the fitting, thus eliminating damage or displacement to the seal during installation.

Furthermore, the fittings have no loose components which can be incorrectly assembled or lost.

compression fittings

Compresion fittings physical properties

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 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.

Compression Fittings Applications


compression fitting is a type of coupling used to connect two pipes or a pipe to a fixture or valve


For the joining of thin-walled pipes or tubes together
Toilet stop valves


Used in cold and hot water taps

Compression Fittings Advantages

Compression fittings are popular because they do not require soldering, so they are comparatively quick and easy to use. They require no special tools or skills to operate. They work at higher pressures and with toxic gases. Compression fittings are especially useful in installations that may require occasional disassembly or partial removal for maintenance etc., since these connections can be broken and remade without affecting the integrity of the joint. They are also used in situations where a heat source, in particular a soldering torch, is prohibited, or where it is difficult to remove remains of water from inside the pipe which prevent the pipe heating up to allow soldering.

Compression Fittings Disadvantages

Compression fittings are not as robust as soldered fittings. They are typically used in applications where the fitting will not be disturbed and not subjected to flexing or bending.

soldered joint is highly tolerant of flexing and bending (such as when pipes knock or shake from sudden pressure changes e.g. caused by water hammer). Compression fittings are much more sensitive to these type of dynamic stresses. They are also bulkier, and may be considered less aesthetically pleasing than a neatly soldered joint.  

Some compression connectors may never be reused, such as a ferrule ring type. It can never be reused once they have been compressed. This connector is directly placed over the pipe and the nut is tightened compressing the ferrule between the pipe and the body of the fitting. Compression of this ferrule also results in deformation of the copper tubing. If a compression type connection needs to be redone, more often than not the compressed copper/ferrule would need to be cut off and a new ferrule is to be used on a clean non-compressed piece of pipe end. This is to assure a leak proof sound connection.

Compression Fittings Dimensions

Male adaptors

Male adaptors

male adaptors 2

Female adaptors

Female adaptors

Female adaptors 2

Adaptors with male thread

Adaptor with male thread

Increasing tees
Increasing tees
Female tees
Female tees

Female tees 2

Male elbows

Male elbows



Reduced couplings

reduced couplings

Adaptors with female thread

Adaptor with female thread

Equal tees

Equal tees

Male tees

Male tees

Female elbows

female elbows



Flanged adaptors

flanged adaptors

Equal elbows

equal elbows