I am currently planning my residential water supply system and would appreciate guidance on whether a booster pump is recommended for supplying adequate pressure to bathroom and kitchen outlets.

Proposed Setup:-

Water Source (very close to the town reservoir): Groundwater drawn from a 70-meter-deep well via a solar-operated pump, filling a 2,000-liter fiberglass DOS tank (referred to as the settling tank).

Stage 1 Filtration: After allowing sufficient settling time (yet to be determined), relatively clear water will be pumped - again using solar power - through a filter bank with 2x5-micron filters, into a second 2,000-liter DOS tank (referred to as the clean water tank).

Tank Placement: Both the settling and clean water tanks are located at ground level.

Stage 2 Filtration & Delivery: Water from the clean water tank will be pumped - using solar power - through an additional filter bank with 2x1-micron filters into a 1,000-liter DOS tank (referred to as the supply tank) situated in the elevated section of the house (approximately 2.5 meters high).

Usage: Water from the 1,000-liter elevated tank will supply the shower, toilet flusher, bathroom sink, washing machine and kitchen sink.

Concern:

Given the limited elevation and lack of gravity-fed pressure, I anticipate low water pressure at the taps and shower - particularly problematic when using an electric hot water unit during cooler months.

Proposed Solution:

I am considering installing an electric booster pump (e.g., a 40L/min model available via Lazada: [url=https://www.lazada.co.th/tag/booster-pump/?q=booster%20pump&_keyori=ss&sugg=booster%20pump_0_1&catalog_redirect_tag=true]BOOSTER PUMPS[/url]) at the outlet of the 1,000-liter tank. 

This pump would support:
All water outlets (taps) in the elevated section of the house including a Stiebel Eltron DHC 8 EC electric shower heater, a Mazuma drinking water filter unit with UV lamp and a washing machine.

Request for Feedback:

I would greatly appreciate any recommendations on reliable booster pump brands that are well-suited for this type of application - particularly from individuals with similar water supply configurations. I also welcome suggestions from those who have adopted entirely different setups that have proven effective in delivering consistent water pressure for residential use. Thanks.

I think most would use a Mitsubishi (et al) domestic water pump. 

 

Link for picture only any decent hardware shop can sell you one.

 

https://www.yonghong.co.th/wp-content/uploads/2019/01/WP-IP-EP-CP-Series.jpg