Water pressure increases with the height from the water tank, therefore the higher the water tank is from the shower point, the more water pressure is. Normally for houses with 2 storey’s, on the 1st floor there is generally not enough height between the tank and shower point, thus causing weak water pressure. The same applies for Ground floor with the supply coming from water tank. You can do some basic calculation on your water pressure by using this formula:
Calculate the water pressure in your home by using this simple formula:
Water pressure is measure by psi or bars. To measure the psi take the number of feet from the water tank to the water heater unit and divide it by 2.3
Example:
Height from water tank above ceiling to water heater unit: 5 feet/2.3 = 2.17psi
Minimum pressure for water heater to operate = 1.45 psi/0.1 bar
Maximum water pressure for water heater = 55 psi/3.8 bar
1 bar = 14.45psi
If following the above formula, the height between the water tank and the heater is 5ft, therefore providing 2.17psi of water which is weak pressure. In order to achieve a comfortable water pressure it is recommended at 1520psi and between 45 liters per minute.
The higher your water tank is from your shower, the more your water pressure will be. If you find your house to have weak water pressure, you can opt for the water heater with builtin booster pump or a centralized booster pump. The water heater models with booster pump can boost your shower by 4× stronger from the original water pressure. The same thing applies for apartments, condominiums or houses with more than 2 storey's.
