Compression Straight Couplings
![Compression Straight Couplings](https://www.stevensonplumbing.co.uk/images/cache/Plumbing/Compression_fittings/15mm_compression_couplers.800.jpg)
Brass compression straight couplings in sizes 4–54mm.
Compression plumbing fittings do not require solder. The joint is formed by tightening a nut and olive onto a pipe, compressing the olive onto a copper or plastic pipe which forms the seal. They can be used on wet pipework, and are suitable for hot and cold systems.