21.   The nuts are standard sizes and are supplied with the fixtures and shutoff valve.

22.   The sleeve is a small brass ring that wedges between the supply pipe and the interior of the shutoff valve to create a watertight seal.

23.   There can be no better example, they say, than the lack of requirements for emergency shutoff valves.

24.   To do that, close the shutoff valve under the tank, and flush the toilet once or twice.

25.   Usually you can locate these lines if there are fixtures, such as a sewer-line cleanout fitting or a water supply shutoff valve inside the basement.

26.   When the tank is drained, close the combination valve and open the shutoff valve to refill the tank to its proper level.