Problem 4
- A Hotrun fitted to the upper floor of a high-rise building that is
gravity fed and it does not operate.
Cause
- The pressure is less than 100 kPa. The pressure of water under
gravity is 9 kPa per metre, this equates to approximately 30 kPa
per floor plus the height of the roof tank.
Remedy
- Remove all restrictors in the tap or aerator and use ‘star’ inserts
in spout instead of aerator. Allowing full flow will often help in
low pressure situations. On request we can help to accommodate
for most situations, sometimes just leaving out the supplied flow
restrictor from the cold water inlet can be sufficient.
