Which side is the hot water tap?

Ever wondered which side the hot water tap should be on? Well wonder no more.

The hot water tap is on the left and the cold tap on the right.

This rule applies to mixer taps as well with the handle positioned to the left for hot and right for cold water.

What if the taps are placed vertically?

If the taps are placed vertically the hot is at the top and the cold placed below.