Hi sifus

I have finally gone through 64 pages of reading on this Grundfos thread.
I have a problem which I cannot totally brain.

My water tank is on the 5th floor of the apartment and my unit is on the 3rd. Problem is the water outlet from the water tank to my unit needs to climb over the wall and according to the contractor/plumber, there is a much higher risk of air trap when the water level in the tank runs lower than the tank outlet which supply water to two bathrooms. Means, the 'climbing' can cost a lot of problems. He said when there is air trap, there will be no water flow from my pipe as it will be blocked. He asked me to instal water pump which costs RM1800. He said, water pump can draw out the air trapped in the pipe so water flow to the bathrooms will be normal again. Is this true?

The water tank area is a common area where all water tanks to other units are also located. If I need to install water pump, I don't think I can install it next to my tank. Would it make sense to install the pump in my balcony which is on the 3rd floor then? Hope to hear from you all so I know if there is a real solution to my problem.





The two bathrooms only using normal instant water heater. Only 2 adults in the house.


Thanks!

This option is only possible if the management allows to do so. No consent so far.