Rhapsody

so far as i see, timo has been the closest, if you set the houses and utilities as shown, and add the 3rd house at the top of a pyramid (hidden behind his/her middle utility on the sketch) then you have a straight pipe up the middle to the house on the peak, and a straight pipe up the edges from the other 2 utilities. in this way, all 3 utilities can even remain on the same plane