they way you are using them i have a couple of suggestions :-)
firstly, the taps that drap across the ground will always break, if you must use these, carry them back in your hand to the van and then real in, pure freedom do one with a little bit of protection or you can use a tennis ball.
or you could use the gardeners tap on your pole hose and have it round you neck or across your palm, this way you dont have to bend down all the time.
my prefer d method after trying both the above is to use an aqua-dapter they really are a great bit of kit, save you loads of time and water, i tried pinching the hose to stop the flow before but still prefer the aqua-dapter, it has probably been my best purchase in recent years, keep in mind if you are using gardeners quick release you will have to buy a tread adapter for about £4