There are two hot and cold water outlets on the wall of the bathroom of the new house, what is the u

This is the responsibility of the plumber. Leave two fewer hot and cold water outlets, then you can't use it where you need it. This is no small matter. Only let the water and electricity be reinstalled.

This depends on the water pipe, if the width of the water pipe is in centimeters, then the spacing should be greater than centimeters. >>>More

It is recommended to keep it, but do not leave it under the floor tiles, and connect the two sleeves together, so that you can spare them without wasting money.

The reason why there are three holes is because there is more than one type of mixing faucet, there are three independent connections combined, such as the hole in the middle is installed with the water outlet, the holes on both sides are installed with cold water switches, hot water switches, the link of the mixed water is combined together with a connecting pipe under the basin, some basin drains have a movable cover, the cover is connected with a connecting rod, the connecting rod is directly behind the faucet, and the pull-out type, this pull rod is installed in the hole in the middle, so it is necessary to make a three-hole basin, a general-purpose basin, As for the spill (the overflow, which is the round hole in the façade in the recess on the inside of the basin), that is the real overflow.

I have the same problem as you. But I only have a sound when the tap water is turned off. And when I turned off the faucet, there was no sound. Turn it off quickly and there will be a sound. No problem with hot water. It hasn't been resolved yet.