1. if the hot water faucet alone is used
   when the room temperature drops suddenly
2. if there is a leak

One of the signs of a leak is noise from a pipe, when water flows through the pipe.

1. Water leaks should be fixed by a qualified plumber.
   Use a temporary patch.
2. You need to replace the pipe.

There are a number of possible solutions including patches, waterproof tape, and special compounds.

1. as long as you turn off the water
   If you use a suitable wrench
2. not really

This is a job for a professional, who might have to cut the pipe section, thread it and replace the fittings at either end.

1. rubber pad and clamps
   a piece of metal superglued over the hole
2. a small piece of wood held by insulating tape

A rubber pad and suitable clamps is probably the best way to go without damaging the pipe

1. Plumbers recommend that temporary patches be replaced within 30 days.
   The patch can be left as long as it holds.
2. The temporary patch needs to be changed once a week.

As long as the rest of the pipe is sound, a good temporary patch can hold permanently.

1. The pipe should be prepared with warm water to ensure waterproofing.
   Application of a suitable lubricant is advised.
2. Before applying waterproof tape, the pipe must be completely dry.

Waterproof tape will hold only if the affected area is completely dry.

1. As long as the water is turned off, it can be used on any leak.
   A small leak can be fixed with a compound stick.
2. Compound sticks are used only before a patch is applied.

The compound stick is effective only on small leaks and can be used even when the water is flowing.

1. as long as the water is warm
   only if the water is turned off
2. if the epoxy is not transparent

Epoxy paste can be applied only to a dry pipe and so the water must be turned off.

1. half an inch
   1 inch
2. 2 to 3 inches

The tape should begin about 2 to 3 inches (5-7.5cm) before the leak and continue the same distance beyond it.

1. One leak is usually the precursor of further problems with the pipe.
   Fixing a leak in time means no further problems
2. As long as a commercial temporary patch is used, there should be no further problems.

A leak can indicate corrosion of the pipe, which means that ultimately further leaks will probably occur.

1. Only a leak can cause dripping water.
   If there is no leak, you probably have condensation
2. If the drip is near the end of the pipe, water pressure should be adjusted.

Dripping water can be caused by a leak in the pipe, a leak at the joint or condensation on the pipe.

1. when water in the pipes is colder than the surrounding air
   when water in the pipes is warmer than the surrounding air
2. when water in the pipes is as hot as the surrounding air

When the water in the pipe is significantly colder than the surrounding air, water drops form on the pipes.

1. This isn't necessary, since condensation helps maintain the temperature of the water in the pipe.
   By spraying lubricating oil on the pipe, you will prevent water drops from forming.
2. Applying insulation should do the job.

By insulating the pipes you can effectively prevent condensation and help maintain the temperature of the water in the pipe.

1. Nothing, you must wait for the pipe to thaw by itself.
   Apply small quantities of cold water.
2. Carefully heat the pipe.

You can try to thaw the pipe by applying some safe form of heat.

1. Wrap a hot towel around the pipe.
   Apply several layers of newspaper soaked in cold water.
2. Insulate the pipe with special "drip" tape.

After wrapping a heavy towel around the pipe, apply hot water.

1. Metal pipes are heat resistant, thus no real precautions are necessary.
   Hold the pipe with insulated gloves.
2. Keep the flame moving and avoid soldered joints.

Using an open flame is dangerous and not recommended, but if you do so keep the flame moving and avoid soldered areas.

1. Open only the cold faucet.
   Open both faucets.
2. Open the hot faucet.

Both faucets should be open to allow water to flow once it thaws.

1. It doesn't matter. The main thing is to get the water flowing.
   Start at the middle so the warmed water can thaw the ice in both directions.
2. You need to start near the faucet so that the thawed water can flow out.

To avoid the pipe bursting as a result of a build up of steam, you should begin near the faucets, which should be open to allow a free flow of water.

1. metallic objects carried by the water flow
   interaction with nearby electricity lines
2. unsecured pipes banging together

The most common cause of noisy pipes is instability -- not something for a pipe shrink, but pipes that are not well secured.

1. switch to PVC pipes
   add a wooden buffer between the pipes
2. reduce water pressure

Attach the pipes more securely and if necessary add a non-metallic (wood, rubber etc.) buffer.