Hot and cold water was piped through to the hammam with earthenware pipes. Water was piped from upstream using gravity. At natural hot springs or geysers, water can be piped directly into radiators. Water was piped into the Upper Ward to create a fountain. It was commonly installed over community water wells in the days before piped water supplies. It can also be piped directly onto cake tiers and works beautifully for delicate work. These piped additional heated air into the gun bays. Treated wastewater is piped out to the South Coast. This gas is piped to kitchen stove. Drinking water is available throughout Oman, either piped or delivered. It boasts 21 campsites with features such as stoves, piped water, toilets and tables. Each bird sang an individual song, produced by piped water and air. Side ponds, piped from the main tube, are incorporated to save water. In many cities, methane is piped into homes for domestic heating and cooking. It is often piped onto a dish using a pastry bag to create decorative shapes.