I have a 1 horsepower water pump and 42 gallon pressure tank connected to the water company and house. Where am I supposed to insert the 3 pcs of 20" slim filters shown below. Should it before the pump, between the pump and pressure tank, or after the pressure tank? Here is the problem of each.
If I insert it before the pump. What if the filters clog from rusts (there are many rusts and sediments in my metal pipe at house). Then the pump can suffer cavitations causing destruction of the impeller.
If I insert it between pump and tank, it can produce high discharge cavitation too if filter clogs and this can destroy the pump impeller.
If i put it after the tank. This can produce pressure loss defeating the purpose of the pressure tank.
Where is whole house sediment filters usually placed?
Best Answer
You ask some good questions, I would ask if the filter is rated to be on the output side of the pump. I normally install filters after the pump to reduce cavitation at the pump.
I install a string filter first after the pump to dampen the pump fluctuations some filters can be damaged so a string filter or porous ceramic that can be cleaned are my first. then to the more sensitive charcoal and other filters. Keep in mind even on a city water system that is chlorinated that string filters can still start growing things if not changed out regularly a well water system with no treatment will need more frequent changes. The other filters are usually based on the water quality and volume. 1 home we added a mechanical water meter inline that counted gallons as the owner requested this to get maximum usage of the filters without going beyond the MFG recommendations. Depending on water quality, well vs city the filter life varies.
the last thing I have installed is a UV treatment. I would caution don’t go with the cheapest system without verifying the lamp replacement cost. Some of the less expensive systems to purchase have 2-3x the cost of replacement so in some cases a more expensive UV purchase up front can be much cheaper by year 3.