水灶，在宁沪一带都称作老虎灶，苏州也习惯这样叫。这是一个很有趣的想像，说是因灶的形状像老虎而得名。后来看到一份早年《吴县水灶业同业业规》的档案材料，才知道它本来还有个俗名儿，叫老火灶。在《业规》之六《区别》中，有这样一段文字：“板炉茶馆及七星炉等不在我业 Water stove, in the vicinity of Ning Hu are called tiger stove, Suzhou is also used to this call. This is a very interesting imagination, that is named after the shape of the stove like a tiger. Later saw an early “Wuxian water industry with industry regulations,” the file material, I realized that it would have a common name children, called the old stove. In the “rules” six “difference”, there is such a passage: "plate teapot and seven-star furnace is not in my industry