Does Shuttie work on all pipe sizes? May 18, 2021 02:51 Updated Shuttie fits 0.75" NPT, 1.0" NPT and 1.25" NPT pipe thread. For pipes 1.5" NPT and larger, please contact us to find the right solution. Related articles How do I use the button on Shuttie? Setting up your account for multiple users Video - Floodie accessories and alerts How much does monitoring cost for Flowie-O? Video - Shuttie Automatic Water Shut-Off Valve Installation