The SW-2 / WW34 filter wrench is made for 3/4" inlet/outlet housings and works with housing model numbers: 150015, 150111, 150295, HF-150, HF-160, HF-360, Ace 45025, Ace 46764, Ace 49560, WVC34, W34 and WC34, and most standard whole-house housings.