Frequently Asked Questions

There is leakage from my Storage Water Heater (Central System). How to fix it?

Check the location of leakage. Click Know More for repair advice.

There is no hot water supply from the shower head but the tap of wash-basin does, or vise versa. How

If the indicator light is on (meaning heater is under normal operation), check whether the tap or pipe is blocked or damaged. Customer should contact a professional for an inspection and repairs.

Why is my Storage Water Heater – Central (GPU series) not producing any cold water but only hot water?

The Storage Water Heater is not out of order. Cold water does not go through the inside of the heater. There is no cold water mostly becausethe tap is broken or the hose is clogged. Contact the Repairs & Customer Service Centre for inspection and repair.

There is no hot water supply. What should I do?

Check if the electric box and Power Switch (Cooker Switch) are operating normally.

When should I install the Pressure Reducing Valve?

The installation of Pressure Reducing Valve is suggested when water pressure is higher than 72.5 pounds.

Category: Central Water Heater

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General What is the new grading standards of energy efficiency? Are German Pool water heaters graded by new standards or not? The new energy efficiency grading standards for storage type electric water heaters has taken effect from 30 June 2024, and will be fully implemented on 30 September 2025. New grading standards will be stricter than old standards. Between 30 June 2024 and 30 September 2025 is a transitional period where new and old energy efficiency labels will both be seen on the market. Only from 30 September 2025 onwards will new labels be used solely. That said, German Pool storage water heaters (V Series) have already been rated Grade 1 under the 2025 grading standards. Consumers can purchase them without worries. Know More
Technical There is leakage from my Storage Water Heater (Central System). How to fix it? Check the location of leakage. If water is dripping from Pressure & Temperature Relief Valve (PTV): 1. It's normal as PTV is releasing pressure and temperature. 2. If water dripping from PTV is more frequent than usual, it is suggested to set temperature at a lower level (between 2 & 3). If there is no improvement, contact us for an inspection. 3. If water dripping from PTV is in large amount and at faster speed, inspection is needed as the water supply pressure and Know More
Technical There is no hot water supply from the shower head but the tap of wash-basin does, or vise versa. How If the indicator light is on (meaning heater is under normal operation), check whether the tap or pipe is blocked or damaged. Customer should contact a professional for an inspection and repairs. Know More
Technical How to make my water heater last longer? Avoid boiling water without interval. Adjust the Thermostat to 2 1/2. To stabilize water pressure, pressure regulator can be installed if the water pressure is higher than normal. Know More
Technical Why is the Storage Water Heater – Central (GPU series) noisy? The water heater is noisy due to gasification. Release hot water inside the heater to force out the air. Procedures: 1. Turn off the power supply 2. Release the hot water 3. Turn off the tap after half a minute/1 minute 4. Repeat the process thrice or more Know More
Technical Why is my Storage Water Heater – Central (GPU series) not producing any cold water but only hot water? The Storage Water Heater is not out of order. Cold water does not go through the inside of the heater. There is no cold water mostly because the tap is broken or the hose is clogged. Contact the Repairs & Customer Service Centre for inspection and repair. Know More
Technical My water heater works perfectly during summer time. However, when winter comes or whenever the tempe We normally want our running water to be hotter during cold weather. Higher water temperature implies more electric power is needed by the water heater to heat up the water. Incomin Know More
Technical There is no hot water supply. What should I do? Check power supply: Restart the power if there is a short circuit of electric box. f the Power Switch (Cooker Switch) doesn't light, customer should contact a professional for an inspection and repairs. If the Power Switch (Cooker Switch) lights but the indicator light doesn't, inspection should be arranged for repairs. Under normal operation, hot water supply is only available after the indicator light goes out. Know More
Technical When should I install the Pressure Reducing Valve? The installation of Pressure Reducing Valve is suggested when water pressure is higher than 72.5 pounds. Know More
Technical Why the water comes out cold and hot from my Storage Water Heater (Central System)? 1. Abnormal pressure of incoming water. 2. Other water outlet(s) in the house is(are) open and competing for water. Know More
Technical Why would the GPU Water Heater make noise? The noise comes from the operating sound of the heating elements. Also, when the water pressure is unstable, the water heater tends to make noise. Know More
Safty Why is there water dripping from the red device on the side of my GPU Water Heater? This red device, known as Pressure & Temperature Relief Valve (PTV), is a device used to release heat and pressure contained within the water tank. When steam passes through the PTV, it'll condense an Know More

Question	Question	Video	Picture	Common
General	What is the new grading standards of energy efficiency? Are German Pool water heaters graded by new standards or not? The new energy efficiency grading standards for storage type electric water heaters has taken effect from 30 June 2024, and will be fully implemented on 30 September 2025. New grading standards will be stricter than old standards. Between 30 June 2024 and 30 September 2025 is a transitional period where new and old energy efficiency labels will both be seen on the market. Only from 30 September 2025 onwards will new labels be used solely. That said, German Pool storage water heaters (V Series) have already been rated Grade 1 under the 2025 grading standards. Consumers can purchase them without worries. Know More
Technical	There is leakage from my Storage Water Heater (Central System). How to fix it? Check the location of leakage. If water is dripping from Pressure & Temperature Relief Valve (PTV): 1. It's normal as PTV is releasing pressure and temperature. 2. If water dripping from PTV is more frequent than usual, it is suggested to set temperature at a lower level (between 2 & 3). If there is no improvement, contact us for an inspection. 3. If water dripping from PTV is in large amount and at faster speed, inspection is needed as the water supply pressure and Know More
Technical	There is no hot water supply from the shower head but the tap of wash-basin does, or vise versa. How If the indicator light is on (meaning heater is under normal operation), check whether the tap or pipe is blocked or damaged. Customer should contact a professional for an inspection and repairs. Know More
Technical	How to make my water heater last longer? Avoid boiling water without interval. Adjust the Thermostat to 2 1/2. To stabilize water pressure, pressure regulator can be installed if the water pressure is higher than normal. Know More
Technical	Why is the Storage Water Heater – Central (GPU series) noisy? The water heater is noisy due to gasification. Release hot water inside the heater to force out the air. Procedures: 1. Turn off the power supply 2. Release the hot water 3. Turn off the tap after half a minute/1 minute 4. Repeat the process thrice or more Know More
Technical	Why is my Storage Water Heater – Central (GPU series) not producing any cold water but only hot water? The Storage Water Heater is not out of order. Cold water does not go through the inside of the heater. There is no cold water mostly because the tap is broken or the hose is clogged. Contact the Repairs & Customer Service Centre for inspection and repair. Know More
Technical	My water heater works perfectly during summer time. However, when winter comes or whenever the tempe We normally want our running water to be hotter during cold weather. Higher water temperature implies more electric power is needed by the water heater to heat up the water. Incomin Know More
Technical	There is no hot water supply. What should I do? Check power supply: Restart the power if there is a short circuit of electric box. f the Power Switch (Cooker Switch) doesn't light, customer should contact a professional for an inspection and repairs. If the Power Switch (Cooker Switch) lights but the indicator light doesn't, inspection should be arranged for repairs. Under normal operation, hot water supply is only available after the indicator light goes out. Know More
Technical	When should I install the Pressure Reducing Valve? The installation of Pressure Reducing Valve is suggested when water pressure is higher than 72.5 pounds. Know More
Technical	Why the water comes out cold and hot from my Storage Water Heater (Central System)? 1. Abnormal pressure of incoming water. 2. Other water outlet(s) in the house is(are) open and competing for water. Know More
Technical	Why would the GPU Water Heater make noise? The noise comes from the operating sound of the heating elements. Also, when the water pressure is unstable, the water heater tends to make noise. Know More
Safty	Why is there water dripping from the red device on the side of my GPU Water Heater? This red device, known as Pressure & Temperature Relief Valve (PTV), is a device used to release heat and pressure contained within the water tank. When steam passes through the PTV, it'll condense an Know More

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