Air Selangor does not allow to install water pump at the main supply. So, usually, main supply to the tank. Then, from the tank to the water pump for the distribution to your bathrooms and outlets.

There are two questions you need to find out:

(1) Do your neighbours face the same problem? If yes, the size of the water tank that requred is one issue since your house is a terrace house. Smaller water tank may not be effective if the entire area suffer low water pressure.

(2) What type of piping used in your house. Those 40 years old house use metal piping. The rust caused the problem. However, for 10 years old house, I think it should be poly or pvc pipes. But, you have to check. Some piping cannot take high water pressure. Usually, the water pump seller would try to sell your the powerful one by asking you how many toilets you have. Those formula assumes you use water concurrently. If you take this formula, the water pressure could cause your water pipe to burst.

This post has been edited by ongss: Jan 2 2025, 12:46 AM

No, one pump only, your main supply should flow directly to the water tank. Then, from the water tank, you use water pump to distribute to your bathrooms, kitchen and etc.

Actually, for older design, most of the developer use main supply for outdoor as well as the kitchen. But, this would cause inconvenience whenever there is a water disruption. So, for me, i change the design. My main goes directly to two big tanks. Then, from these two tanks my pump distributes. So, even if there is water disruption, my kitchen and outdoor garden are not affected as my supply in the tanks is able to sustain for 5 days.

Ya, thanks for the information, my contractor did tell me that.

Honestly, water directly from main is techinically non-potable. I have to use a battery-power timer to flush out the dirts accumulated inside my water filter everyday. My drinking and cooling water supplies are from filtered dispensers.

Probably i need to send my water for checking.

I stay at Damansara area and experienced frequent water disruptions during my renovation, for 2024 e.g.

https://www.thestar.com.my/metro/metro-news...duled-water-cut
https://www.thestar.com.my/news/nation/2024...ys-air-selangor

The above were made public. There were occasional few hours type of unscheduled disruptions. I could see most of my neighbours have big tanks. So, I analyzed my old water bills to see our usage of water. Then, I install tanks with capacity to last for 5 days.

My cost, back in 2022, were around:

- RM 3668 for 2 Kingkong 2300L HS230 tanks,
- RM 4200 for Grundfos CMBE3-62 main water pump
- RM 980 for a CNP PM370S standby water pump
- RM 1100 for PS UF Membrane Filter (including the auto timer for flusing).
- RM 3000 for the labour cost to install all the pipings (this one was extremely expensive as my contractor cut throat).

I have some space at my backyard. So, I placed all these at the back and I can check the cleanliness of the tanks. I also used an auto timer to flush the membrane filter.

stormer.lyn did highlight a valid issue about the risks of growing bacteria in the water tanks. For that, I took mitigations. I use RO water dispensers for drinking and regularly change the filters. As for cooking, I have another water filter under the kitchen sink for cooking. So far for one year, we are healthy. Will find out how to check the levels of bacteria inside the water.

This post has been edited by ongss: Jan 6 2025, 10:55 AM

Just for your information, my main contractor also told me about the risk of bacteria. I did some research, this is one example of information available

https://dwi.gov.uk/consumers/learn-more-abo...s-and-cisterns/

I observed most of the requirements as stated in the above website.

I am not trying to convince you on anything. Anyway, I already alerted TS about your comment about bacteria.

This post has been edited by ongss: Jan 7 2025, 10:58 AM