A plumber placed a shut-off valve with a bleeder port under the vanity in our upstairs bathroom. He used this valve to feed an outdoor hose bib. The plumber left the bleeder port in the open position. We turned on the valve to use our garden hose and the next day we heard a water dripping sound downstairs (the open drain leaked water down to the bottom floor and flooded it out).
Is placing a shut-off valve upstairs under a vanity to feed an outside hose bib against the building code?
Should we accept a solution of replacing the shut-off with a drain with one without a drain, and keep the plastic pipe in?
Or should the plumber be required to place the shut-off valve downstairs in utility room where there is a drain?
The entire house was done with copper pipe, the only place plastic pipe was used was to feed the outside faucet from the vanity in the upstairs bathroom.
Shouldn't builders be required to do the entire job with the material they started out with?