Why do we use so much water to cook spaghetti?
A tall thin pot is a hazard as it can be tipped over all too easily

The book says use lots of water to ensure even cooking and to stop the pasta sticking. But regular stirring will solve this problem too

Just use less water in a regular pot and feed the pasta into the boiling water. It takes about 30 seconds for long spaghetti to soften enough for it to fit into a regular pot. It cooks just fine WITHOUT breaking it up if you give it a quick stir after a minute, and then every couple of minutes or so

If you know your stove temperature and spaghetti type, it will only take a couple of goes to work out the least amount of water you can use. I use about 1 l of boiling water for three adult servings of spaghetti in a medium domestic pot. With the lid half on it is cooked to a firm bite point in less than 8 minutes, and the water just covers the spaghetti when finished