Brass Compression Female Iron Elbow is used for joining two lengths of copper pipe with the same diameter to create a corner. One end has a standard pipe connection and the other a female thread. It requires no special tools or soldering for installation, just tighten with a spanner. It creates a joint by compressing the ring onto the tube. It can be used in hot or cold water applications as well as heating and low pressure gas installations. Can be used on wet pipework and be dismantled and re-built.