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PLUMBING TOPICS OIL TANKS SEPTIC SYSTEMS WATER PRESSURE & FLOW MEASUREMENT Definition of Static Water Pressure Definition of Dynamic Water Pressure How to Measure Water Flow Rate in a Building WATER PRESSURE GAUGE ACCURACY WATER PRESSURE LOSS DIAGNOSIS GUIDE BAD MUNICIPAL WATER PRESSURE or FLOW BAD WELL WATER PRESSURE or FLOW 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 pipe clog diagnosis Water pipe clog repair guide Making the "right" repair Typical Water Tank & Pump Prices Typical Pressure Tank & Pump Prices WATER PRESSURE REGULATOR ADJUST What's a Water Pressure Regulator? Causes of Variation in Water Pressure Diagnose Poor Municipal Water Pressure Adjust Bad Pressure Regulator on Municipal Water 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 Reliability of Pump & Tank Repairs 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 TANK AIR VALVE REPAIRS WATER TANK PRESSURE GAUGE WATER TANK DRAIN VALVE WATER TANK RELIEF VALVE CHECK VALVES WATER FILTERS 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 CONTROLS & SWITCHES on WATER TANKS INTERMITTENT CYCLING WATER PUMPS 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 LIFE EXPECTANCY WELL PUMP TYPES & LIFE EXPECTANCY More Information InspectAPedia Blog - News Updates Air Conditioning & Heat Pumps Bookstore Electrical Environment Exteriors Heating Home Inspection Insulate Ventilate Interiors Mold Inspect/Test Plumbing Water Septic Roofing Structure Accuracy & Privacy Policies Contact Us |
This article describes Diagnosing a Bad Water Pressure Regulator - how to diagnose the loss of water pressure and the need for a replacement water pressure regulator. The process of water pressure problem diagnosis and the costs of the repair are explained. Readers whose building is served by a private pump and well system should see WATER PUMP PRESSURE CONTROL. Distinguishing between static water pressure, dynamic water pressure, and water flow rate can help diagnose water problems in a building. Here we explain these concepts and we describe how to measure water pressure and flow at a property where either municipal water supply or a private well and pump water supply is in use. © 2009 Daniel Friedman, All Rights Reserved. Information Accuracy & Bias Pledge is at below-left. Use links at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website. What is a Water Pressure Regulator, Where are They Installed, Why?
Causes of Variation in Building Water PressureThe water pressure regulator setting may not be the same as the water pressure you'll actually get in the building. Depending on the size of the building, its piping size and length of piping runs, and the number of fixtures and number of occupants (and similar variables) in a building, it is possible to draw water out of the building supply piping at such a high rate that the overall building water pressure drops considerably below the pressure setting at the water pressure regulator. With a municipal water supply the water pressure will vary depending on how many fixtures are being run, and also the municipal water system pressure may vary in the street as well. Water flow rate in a building also depends on the diameter, length, and number of bends or valves in the piping system. Clogged water pipes reduce water flow rate, not water pressure. With a private well and pump water supply, water pressure will also vary depending on the water pump on and off cycle and possibly on the ability of the well to deliver water. How do we Diagnose Poor Municipal Water Pressure & Flow in a BuildingKey things to check when water pressure and flow are inadequate in a building served by municipal water supply are
For details about the above items, see BAD MUNICIPAL WATER PRESSURE or FLOW
If the pressure control was set too low to start with or if there is a problem with the water pressure regulator, you may see an improvement in water pressure by diagnosing and adjusting or repairing this control. If the loss of water pressure was sudden, it's not likely to be a problem the pressure regulator except in the less common cases of a blockage or failure in the regulator itself. In this photo our flashlight lights up a (rather amateurish looking) water pressure regulator installed on a municipal water supply. You can see that a previous connection to the water meter was cut, left shut off (see that shutoff valve at the left hand vertical pipe - what happens if someone opens that valve?), and new fittings were installed to conduct incoming water to the building water supply piping. The use of smaller diameter flexible copper tubing might restrict the incoming water flow, but the presence of a pressure regulator at all suggests that the incoming pressure may have been excessive. (Too high water pressure leads to fixture leaks.) How to Adjust the Water Pressure Regulator on Municipal Water SupplyW we've already mentioned checking and adjusting the pressure control for the water pump on a private well system - just above. But what if the home does not have it's own well - what if the building is connected to a municipal water supply? A water pressure regulator may be installed. See the illustration at the top of this page. A device, usually a few inches across and often shaped a bit like a bell, may be found installed at the water meter. The water meter is often installed where water pipes enter the building and the pressure regulator will be installed just after the water meter on the same pipe. You may see a screw secured by a lock-nut on the top of the meter or there may be another screw or knob that will permit the water pressure regulator to be adjusted to set the water pressure up or down in the building. Which way to turn the water pressure regulator screw? On most pressure regulators, after loosening the lock-nut around the adjusting screw, turning the screw in will increase the water pressure. Don't overdo-it. Just a turn or two should make a difference. Keep track of the number of turns so that you can go back to where you started if necessary. Sometimes the municipal water supply may itself be temporarily shut down or running at reduced flow. Check with your local water department or neighbors. Increasing the building water pressure by adjusting the pressure regulator (or a pump pressure control switch) will not fix a poor water delivery rate from the source (municipal water main or local private water pump), but if the pressure was set too low to start with you may see an improvement by this adjustment. If your loss of water pressure or flow was sudden, it's not likely to be a problem with the pressure regulator except in the less common cases of a blockage or failure in the regulator itself. A Guide to Building Water Pressure by Adjusting or Repairing the Water Pump Pressure Control Switch on a Private Pump and Well Water SupplyFor details about diagnosing poor well water pressure and flow, start at BAD WELL WATER PRESSURE or FLOW or go directly to the individual items listed just below.
... Technical Reviewers & References
Use links just below or at the left of each page to navigate this document or to view other topics at this website. Green links show where you are in our document or website. PLUMBING TOPICS Books & Articles on Building & Environmental Inspection, Testing, Diagnosis, & Repair
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WATER PUMP, TANK & WELL REPAIRS More Information InspectAPedia Blog - News Updates Air Conditioning & Heat Pumps Bookstore Electrical Environment Exteriors Heating Home Inspection Insulate Ventilate Interiors Mold Inspect/Test Plumbing Water Septic Roofing Structure Accuracy & Privacy Policies Contact Us |
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11/03/2009 - 09/15/2006 - InspectAPedia.com/water/Bad-Water-Pressure-Regulator.htm - © 2009 - 1988 Copyright Daniel Friedman All Rights Reserved - InspectAPedia® is a Registered U.S. Trademark