This visual above summarizes the differences between AC Booster Pump and DC Silent Pump.
- Pump speed | AC Booster Pump boosts stronger water flow as compared to DC Silent Pump.
- Noise Level | AC Booster Pump generates more noise as compared to DC Silent Pump.
- Energy Efficiency | DC Silent Pump is more energy efficient as compared to AC Booster Pump.
- Warranty | DC Silent Pump has a longer warranty period (5+1* years) as compared to AC Booster Pump (1+1* years).
* The additional CENTON +1 year warranty period extension is only valid for CENTON e-Warranty submission completed within 1 month from the date of purchase.
1. Does that mean that DC Silent Pump is better than AC Booster Pump?
Both are good, it just depends on which of their benefits are your priorities.
2. Can I control the pump speed, or turn it off?
Yes, provided the instant water heaters have the Pump Control function, which comes in the form of a knob found at either side of the instant water heaters, that you can tune to adjust the pump speed from maximum speed to off.
3. Will these built-in pumps generate water flow as fast as hotels?
Please note that you cannot expect instant water heaters’ built-in pumps to generate hotel-like water pressure. Hotels are using much more powerful external booster pumps placed at their main water supply, which generate much stronger water pressure compared to these significantly smaller built-in pumps integrated inside the instant water heaters.
4. If my bathroom’s water pressure is extremely low, will these built-in pumps solve my problem?
Most instant water heaters in the market require at least a consistent 2 litres per minute (2 LPM) water flow for them to function properly, as most instant water heaters are equipped with a component called Flow Switch, which turns on an instant water heater if the water flowing thru the instant water heater is above 2 LPM, and turns off an instant water heater if the water flowing thru the instant water heater is below 2 LPM.
Please note that if your bathroom’s water pressure / water flow rate is extremely low (below 2 LPM), the water flow might not be able to trigger the Flow Switch to turn on, which means that your instant water heater and its built-in pump will not be turned on.
In conclusion, most instant water heaters in the market will not be able to function in a bathroom with extremely low water pressure / water flow rate, even if they are equipped with built-in pumps (with the exception of instant water heaters with the Pump Activator function, such as CENTON Atlantis Series).
5. What is the Pump Activator function?
Certain instant water heaters, such as CENTON Atlantis Series, have the Pump Activator function, which can be activated via a button found on the instant water heaters. The Pump Activator button, when pressed, will manually and momentarily jump start the instant water heater’s built-in pump, even when the water flow rate is not high enough to trigger the Flow Switch to turn on the instant water heater and its built-in pump. The manually activated built-in pump will then increase the water flow rate, which then triggers the Flow Switch to turn on the instant water heater.
In conclusion, instant water heaters with the Pump Activator function, such as CENTON Atlantis Series, are the best choice for bathrooms with low water pressure / water flow rate. But please note that bathrooms with water supply issues (e.g. even with built-in pump activated, mostly air being pumped in through the pipes rather than water) will not be able to use instant water heaters, even those with Pump Activator function.
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