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I have a 1 HP Monobloc pump lifting water from an underground reservoir to two overhead tanks (2x 1000 ltr) which are at a height of 25-28 feet. The supply from the tank splits in 2 parts for the first and the second floor. For the first floor I need a pressure pump for the toilet line.

The water being very dirty and muddy I am planning to use three stage big blue filter (10" x 4.5" each) with 1" ports and a pre-filter (sediment strainer) on the pump inlet.

I want to ask if I can fix the 3 stage filter on the outlet of the pump as otherwise there is no way to clean the water for both lines. The line- 2 provides no option or position to fix such filters. If needed I can change the pump with a higher capacity. Please advise me the right position. Rough drawing of water line

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I would put the filter on the pump outlet. If you put the filter on the inlet it may cause pump cavitation but on the output side the pressure will push the water through with no problem.

Remember that filters on drinking water systems need to be replaced regularly to prevent things from growing. Many times UV systems are added to reduce risk of growth in filter systems. Pre-filters on a pump can be good and bad. If the filter gets plugged it will limit the flow to the pump and shorten the life. I like screen filters to prevent small grit from wearing the pump, but these may need to be cleaned quite often depending on the size of the filter and amount of water pumped.

  • Thanks ! I am planning to use a 'Rusco' sediment trapper on the inlet within view and which can be cleaned easily. – Debashis Dey Jul 31 '17 at 13:53
  • I agree but some filters need the pressure tank between the pump so the filter beds are not damaged by the pulsating pressure from the pump. I don't see a pressure tank so that should be checked to make sure the filter media won't fail. – Ed Beal Feb 24 '18 at 1:54

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