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This article describes water filters used on building water supply systems, including both municipal water supplies and private well water systems. Also see Filters for Drinking Water Purification for a discussion of portable and emergency water filters that are designed to purify drinking water.

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A clogged water filter can block water flow between a pump and water tank or between a water tank and the rest of the building. Try changing the water filter by installing a new cartridge; temporary diagnosis can be made by simply removing a suspect water filter cartridge from its canister entirely. We have also seen a clogged water filter cause water pump short cycling, with a rapid "on-off" pump cycle (which is bad for the pump and pump relay switch.) See WATER PUMP SHORT CYCLING for details. If this is your situation try first changing out the water filter for a clean one. Technical note: the same clay, silt, or other debris that clogs a water filter can clog up the pressure sensing opening in the bottom of a pump pressure control switch, as we discussed just above. So if you are looking for a clogged filter, if changing the water filter does not correct a problem with the water pump cycling operation, also consider a possibly-clogged pump pressure switch.

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PLUMBING TOPICS
OIL TANKS
SEPTIC SYSTEMS
WATER PRESSURE REPAIR GUIDE & COSTS
WATER PRESSURE & FLOW MEASUREMENT
WATER PRESSURE LOSS DIAGNOSIS GUIDE
WATER PRESSURE & FLOW MEASUREMENT
  WATER PUMP PRESSURE CONTROL ADJUSTMENT
  WATER PUMP PRESSURE CONTROL REPAIR
  WATER PRESSURE REGULATOR ADJUST
WATER PUMPS & WELL TANKS
  WATER PUMP CONTROLS & SWITCHES
  IDENTIFY WELL PUMP TANK COMPONENTS
  MAIN WATER SHUTOFF VALVE
  WATER PUMP ELECTRICAL SWITCHES
  WATER PUMP PRESSURE CONTROL
    WATER PUMP PRESSURE CONTROL ADJUSTMENT
    WATER PUMP PRESSURE CONTROL REPAIR
    WATER PUMP PRESSURE CONTROL REPLACE
  WATER PRESSURE REGULATOR ADJUST
  WATER PUMP RELAY SWITCH
  WATER TANK AIR VOLUME CONTROLS
  TANK AIR INLET VALVE
  WATER TANK PRESSURE GAUGE
  WATER TANK DRAIN VALVE
  WATER TANK RELIEF VALVE
  CHECK VALVES
  WATER FILTERS
PUMP TYPES & LIFE EXPECTANCY
  WATER PUMP, ONE LINE JET
  PUMP, TWO LINE JET
  PUMP, SUBMERSIBLE
WATER PUMP & TANK SAFETY
WATER SUPPLY & DRAIN PIPING
WATER TANK TYPES: WATER, OIL, EXPANSION, ALL
  CAPTIVE AIR BLADDER WATER TANKS
  STEEL WATER TANKS
  BIG WATER STORAGE TANKS
  OPEN WATER TANKS
WATER TANK LIFE EXPECTANCY
WATER TANK REPAIRS
WATER TANK AIR, HOW TO ADD
WATER TANK REPLACEMENT
WATER TANK BLADDER PRESSURE ADJUSTMENT
WATER TANK PRESSURE CALCULATIONS
WATER TANK SIZE & VOLUME
WATER TANKS HOW THEY WORK
WATER TESTING
WATER TREATMENT EQUIPMENT CHOICES
WELLS CISTERNS & SPRINGS
  WELL TYPES: DRILLED, DUG, POINT, CISTERNS & SPRINGS

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