My new washing machine only uses cold water so I had to block off the hot water tap which supplies the hot water. It appears the plastic pipes which are common these days use a tap which needs a 3/4" blanking cap. 15mm and 22mm blanking caps which were used on old metal piping are widely available locally but not the 3/4". Thank goodness this was delivered quickly by the seller. It helped me to get the machine installed before the pile of dirty clothes grew too high.