Boxed pressure gauge replacement Fits micro-clear vertical grid, perflex extended-cycle d.e. filter and sand filter models ec30, ec40, ec40ac, i_pfppts, s160t, s200, s240, s245t, s190t Also fits hayward pro series sand filter models s210s, s244s, s310s, s140t, s144t, s180t, s210t, s220t, s220t2, s230t, s244t, s244t2, s270t, s164t, s166t. ECX270861 DO NOT INSTALL HORIZONTALLY