Y Strainer take their name from their configuration. are cast in sizes ¼” – 24″ with Threaded, Socket Weld or Flanged End connections. Strainer are your most economical choice for large debris removal. They are most commonly used in pressurized lines, gas or liquid, but can also be used in suction or vacuum conditions. Y-Strainer has the advantage of being able to be installed in either a horizontal or vertical position. However, in both cases, the screening element or “leg” must be on the “downside” of the strainer body so that entrapped solids can be properly collected and held for disposal.