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Author:
RenovMan (CA)
Everything was fine with one of our showers until the house was repiped with copper. After the repipe the hot water pressure to that tub/shower dropped a lot. I thought maybe some flux clogged the cartridge, but we replaced that and the problem remains. It's probably the valve itself. Maybe solder or flux got into it. Cold water pressure is okay.
It's a 1991 vintage Price Pfister valve. Parts still readily available.
Short of cutting into the drywall in a closet on the other side of the wall from that shower to replace the valve, is there another possible solution like back flushing the valve with water or blowing out the valve with compressed air?
Also, is draining water from a hot water heater annually needed to remove scale or sediment, or is that a myth? I've had some plumbers tell me to do it, and others have said the scale builds up on surfaces in the hot water heater and is not removable by draining water. Sort of like barnacles.
Thanks.
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Author:
srloren (CA)
To answer the question about scale build up in a water heater, it does build up because when the water is heated the minerals solidify in a coating on the bottom of the tank. But the water heater expands and contracts causing these scales to flake off and buildup in the bottom of the tank. Yes you should drain your water heater every 90 days. The problem is that the hose bib in the bottom of the tank has a small opening so the best way to drain your tank is to replace the hosebib with a brass nipple with a ball valve and a male hose adaptor so you can attach a garden hose and get larger pieces of minerals out of the tank. If you drain a gallon or two out of the tank every 30 days or so, you can drain the particles before they get too large to come out of the drain. Then you won't have to drain the tank as often.
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