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How to Diagnose Bad Water Pressure Due to Clogged Water Pipes InspectAPedia®  -     Guide to Diagnosing Bad Water Pressure due to clogged water supply piping in a building How to find where water pipes are clogged and how to repair this problem. How to diagnose loss of water pressure or loss of water in a building

This article describes How to Diagnose and Cure Bad Water Pressure Due to Clogged Water Supply Pipes - how to diagnose the loss of water pressure and the need for a replacement water pressure tank and water pump. The process of diagnosis and the costs of the repair are explained. Consumer advice on saving money on well repair costs includes a review of the parts and labor costs of a typical well pump and pressure tank replacement case.

Readers of this document should also see Diagnosing loss of water pressure or flow in a building.

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How to diagnose clogged building water supply piping as a cause of bad water pressure

Clogged water supply piping can cause poor water flow in a building. This can occur suddenly from debris clogging a delivery pipe, often at a turn or "elbow" in the piping, but that's not common. If the building water supply piping is blocked usually this is a long-standing problem.

Examples of causes of poor water pressure due to blocked pipes include water pipes becoming clogged internally due to rust or mineral build-up (is your water hard? are the pipes iron?), or poor installation of the supply piping (did the plumber push too much solder into a copper pipe joint during installation? There are two useful diagnostic tricks here:

• First make sure you rule out simple problems like a clogged water filter (See WATER FILTERS) , a partly-closed main water valve, or problems with the water supply source itself. That diagnosis procedure starts at WATER PRESSURE LOSS DIAGNOSIS GUIDE.
  
  Also be sure to rule out clogged faucet strainers, broken o-rings in faucets, and similar fixture-specific problems which we discuss at Poor water pressure just at certain plumbing fixtures.
• If water pressure is good when you first open a faucet, but immediately falls off to a poor flow, then the system pressure is good but there is probably a constriction in the piping.
  
  
• If water pressure is good at some fixtures but terrible at others then it's not a system problem, it's a problem at an individual fixture or at water supply piping feeding that fixture. For example, awful water pressure at one sink could simply be due to a clogged strainer at the faucet.
  
  
• If water pressure is good in some areas of the building but poor at others at all fixtures and if this problem has always been present, there may be a blockage at just one water supply pipe or connection, such as at an elbow clogged by solder. We've diagnosed this problem the hard way by starting to cut open supply pipes downstream from the last point where we found good water pressure.
  
  
• If you run out of water, or can't seem to get enough water fast enough out of a well, see How to Get More Water From a Well
  
  

A main water supply pipe failure between the municipal water main in the street (or from a private well) and water supply pipes in the building the building, can occur, perhaps by leaking or by becoming clogged with rust or minerals so that water is not being delivered to the home at good pressure or not at all (if the water line has burst).

In cold climates, the water supply line may have frozen outside or even in the building at an un-heated location.

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PLUMBING TOPICS
OIL TANKS
SEPTIC SYSTEMS
WATER PRESSURE REGULATOR ADJUST
WATER PRESSURE REPAIR GUIDE & COSTS
  Questions about lost water pressure
  Advice to a homeowner
  Adjusting Water Pump Pressure Control
  Right Repair to Pump & Tank?
  Well Pump & Tank Replacement Costs
WATER PRESSURE LOSS DIAGNOSIS GUIDE
WATER PRESSURE & FLOW MEASUREMENT
  Water Pressure Intermittent
  No Water Pressure
  Well Tank relation to Water Pressure
  Shaking the Water Tank?
  Water Pressure Tank Problems
  Water Pressure Tank Diagnosis
  Water pressure Later Returns "on its own"
  WATER PRESSURE REGULATOR ADJUST
  Water pipe clog diagnosis's
  Making the "right" repair
WATER PUMPS & WELL TANKS
WATER PUMP CONTROLS & SWITCHES
WATER PUMP TYPES & LIFE EXPECTANCY
WATER PUMP & TANK SAFETY
WATER SUPPLY & DRAIN PIPING
WATER TANK TYPES: WATER, OIL, EXPANSION, ALL
WATER TANK LIFE EXPECTANCY
WATER TANK REPAIRS
WATER TANK AIR, HOW TO ADD
WATER TANK BLADDERS & CAPTIVE AIR
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, PUMP, TANK LIFE EXPECTANCY

• How to Diagnose & Repair a Bad Water Pressure Due to Clogged Water Pipes - diagnose bad water pipes
• How to Repair Bad Water Pressure Due to Clogged Water Pipes - fix clogged water pipes
• Water Pump Problems? How to Diagnose & Repair Poor or No Water Pressure - diagnose bad water pressure
• How to Know if the Right Repair Was Performed to Fix Lost Water Pressure
• Water pump and pressure tank repair diagnosis

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