We are building a new house. I was able to bury some 6 inch PVC in the stone before the basement floor was poured, an opportunity not to be missed!
The single end of the Y will be under the stairs where the DC motor will be, one end goes to the table saw, the other to a miter saw station. The hose taped to the side is an air line. There is a seperate, smaller conduit bringing power to the table saw location. It took some splaining to the concrete guys but we got there.