Hottap Outdoor Water Heater (10 Qt) The Hot Tap provides an endless supply of hot water given a constant heat source. Nothing else like it on the market. It is very low tech,but very efficient The 10 Qt Hot Tap provides for all the hot water needs of a group up to twenty people in a camping or remote setting. *Endless supply of hot water disclaimer: The three different sizes of Hot Taps provide an endless supply of hot water as long as the maximum capacity of the Hot Tap is not exceeded all at one time. Lesser amounts of hot water poured through on a regular interval can be poured through endlessly given a constant heat source.