Which type of strainer is designed to house two single element filters?

The duplex strainer is specifically designed to house two single element filters, allowing for increased operational efficiency. When one filter is in use, the other can be taken offline for cleaning or maintenance without interrupting the flow of fluid through the system. This dual-filter capability makes the duplex strainer particularly advantageous in applications where continuous operation is critical, as it minimizes downtime.

In contrast, a simplex strainer contains only one filter element, which means that any maintenance on that element will stop flow entirely until the filter is cleaned or replaced. A triple strainer would imply three filter elements, and a multistage strainer generally refers to systems that have various stages of filtration, not necessarily designed for dual element use specifically. Therefore, the duplex configuration stands out as the correct choice for housing two single element filters.