The image shows a Clera or similar in-line single water filter housing with a filter cartridge inside. It is used to filter impurities from water pipelines before they reach plumbing equipment or containers.
Shopping information:
The system typically includes a PP (polypropylene) filter cartridge.
It is designed for easy installation and connection.
The typical inlet/outlet pipe thread size is 3/4".
The filter is designed to withstand water pressure up to 125 psi.
It is available from various online retailers and local suppliers.