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Question DetailsAsked on 4/23/2016

general cost to replace water line in 60 yr old home 37214

very low water pressure main floor of house...water bill good...line runs into garage about foot underground..water pressure in finished basement and laundry area very good.....

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You say water pressure is good in finished basement and laundry area - so clearly not an incoming pipe issue - has to be a blockage or general sedimentation/buildup or a blocking valve or such in only part of the in-house plumbing. Generally, even if the line to the rest of the house is underground (very unlikely to go back underground after it daylights in a house), replacement would typically be far easier within the house framing than cutting into concrete slabs to replace it - opening up the finished basement ceiling here and there to run new piping there for instance. That also makes it readily accessible if future repair is needed.


I would first have a plumber find out WHERE the blockage is - or you might be able to localize somewhat first by trying ALL water consumption points for good or poor flow and tracing out the piping (you can clearly hear it in the walls with water running) to determine if this is just a single branch run with issues or what.


I am presuming you mean low flow in main floor - if you actually mean low pressure, then you have to have a pressure regulator somewhere in the system that is causing the low pressure - because it is impossible to have different static pressure in a household system where all the pipes come off a common source. IF you mean "low pressure" only when water is flowing (so starts with good spurt of flow but then drops off to low flow due to flow resistance in the piping) that indicates a partial blockage somewhere.


After checking for partly closed valves or a pressure regulator (maybe put in to protect a water heater ?), the next step would be cutting into the pipes a couple of places and putting in a temporary hose bib or hose threaded fitting so he can check the flow up to that point - in an hour or so should tie down whether it is a blockage and where, too small a piping diameter, or if perhaps you have a general buildup of iron algae or lime buildup or such which would mandate a significant amount of piping replacement to restore flow.


I do NOT recommend chemical treatment of the pipes to dissolve buildup - it all too commonly, because it is acidic, results in unacceptable damage to metal piping and valves and connected appliances and such as well.


Fixes like this can commonly (in normal one or two story house up to about 2000SF) run from a $200-400 if it is a point problem, to commonly a thousand to three if requires significant household water repiping - plus commonly a thousand or more drywall repair and painting after significant replacement if the piping has to be run through finished ceilings and walls.


And no, insurance does not cover it.


Plumbing is of course your Search the List category to find a good provider.

Answered 2 years ago by LCD




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