The cause and the repair method of a leak of a water heater
There is often an example which leaks with the water heater of an electric water heater, kerosene, or gas. Repair is simple, if the hole opened in piping or a water heater simply and water has leaked. However, a cause is not sometimes often known well.
How to repair the leak of water heater
Some causes of a leak of a water heater are various as follows.
- When a water heater, the joint of piping, and piping have a crack and a crevice and water and hot water have leaked from there.
- Failure of a safety valve
- Failure of a reducing valve
- Failure of the prevention-of-backflow valve of water mixing valves
- When water is stopped at the point of the faucet of water mixing valves without a prevention-of-backflow valve
A leak peculiar to the case where the solar water heater is being used
- Failure of a ball tap
- When the position of a solar water heater is located in a place higher about 6-8 m than a water heater
When the case where a hot-water heater has a hole, the joint of piping, and piping have a hole
When the hole is open for somewhere in piping from the inside of a water heater, or a water heater, naturally water and hot water leak. In such a case, repair will be completed if the hole is plugged up. It is the simple failure which often exists.
Failure of a safety valve and a reducing valve
Next, many failures are the leaks from a safety valve. This needs to keep in mind that there are other causes, although there is also a case of failure of a mere safety valve.
There is most failure of the safety valve itself. The safety valve is always used for the decompressed type water heater with the reducing valve. It is used in order to prevent high pressure from this being the high pressure of water service, and a rise in heat of water, and requiring for a water heater at a water heater.
Since the safety valve by the side of hot-water supply is used for years at the place where temperature is high, there is much failure. First of all, safety valves are exchanged.
If the reducing valve is out of order even when a safety valve is normal, water and hot water may leak from a safety valve. It is because the pressure of piping or a water heater may rise by failure of a reducing valve. In this case, reducing valves are exchanged.
Failure of the prevention-of-backflow valve of water mixing valves
Even if a safety valve and a reducing valve are normal, it may leak from a safety valve. Diagnosis of such failure becomes difficult. The prevention-of-backflow valve is attached to the water mixing valves which are mixing water with hot water.
If this valve is out of order, water will flow backwards from the water side with high pressure to the hot water side where pressure is low, and the pressure of a water heater will rise. As a result, water leaks from a safety valve. In this case, a prevention-of-backflow valve is exchanged. Or water mixing valves are exchanged.
When water is stopped at the point of the faucet of water mixing valves without a prevention-of-backflow valve
Although neither a safety valve nor a reducing valve nor water mixing valves are out of order, water may still leak from a reducing valve. Diagnosis will become still more difficult if it becomes like this.
Even when water is stopped at the point of the faucet of water mixing valves without a prevention-of-backflow valve, water leaks from the safety valve of a hot-water supply machine. This will become such if the goods which take out the water a "water lever" or it stops are attached and used for the point of the faucet of water mixing valves without an ordinary prevention-of-backflow valve. Only when water is stopped with this "water lever", since condition appears, diagnosis becomes difficult.
In this case, this "water lever" is not used or it exchanges for water mixing valves with a prevention-of-backflow valve.
Failure of the ball tap of a solar water heater
A leak generates failure of water mixing valves etc. as well as the time of a solar water heater or a water heater. Next, a leak peculiar to a solar water heater is explained.
Since water will not stop in a solar water heater if the ball tap of a solar water heater breaks down, a leak occurs. It seems that degradation is early since a ball tap also has the temperature of a solar water heater in a high portion. There is only exchanging.
When the position of a solar water heater is located in a place higher about 6-8 m than a water heater
If the position of a solar water heater is located in a place higher about 6-8 m than a water heater when the water heater and the solar water heater are being used together, it may leak from a safety valve.
The set pressure of a safety valve has many which are 80 - 100kPa (kilopascal), and there is also a thing of 60kPa in an old thing. This is made into water pressure and is equivalent to 6-10m. That is, if water pressure becomes more than this, it will leak from a safety valve. In this case, the position of a solar water heater is changed or a safety valve is exchanged for the thing suitable for this.