Low hot water pressure


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Old 12-26-13, 05:35 PM
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Low hot water pressure

Hello all,

I apologize if this may have been covered before but I was unable to find an answer.

My problem: Low hot water pressure. Hot water only, cold water pressure is good and strong at all locations (kitchen, br #1 and br #2, outside faucets).

In the past week noticed a difference between hot and cold water. Hot water had slightly lower pressure, and had a white sediment as well.

decided to Flush the water heater to rid of the white sediment and hoping for improved water pressure

used the following steps:

turned temp to pilot prior to starting

1) ran hot water at kitchen
2) Ran hose from drain pipe to outside,
3) opened drain valve
4) turned off cold water intake (noticed water ran for 10 sec then stopped)
5) Opened Pressure relief valve, draining resumes
6) After it appears to be fully drained, opened cold water intake.
7) ran until clear water, about 20 mins
8) closed drain valve, tank if filling back up
9) hear notice a trickle in the kitchen faucet as is hot water is coming back up

new problem: kitchen hot water flow is now low to no pressure, significantly lower than prior to flush.

pressure drops even lower if i open more faucets

opened pressure relief valve (hoping air was trapped and was the problem), water only comes out. no improvement

closed the kitchen faucet, waited for a few minutes, opened again, notice "regular" flow for 1-2 secs then slows to trickle.

Possible problems/solutions.


background on house plumbing:
Water heater is an American Standard (installed June 2013). Whole house was repiped with PEX in at the same time, new main copper line installed as well. all lines valves are new installed at same time.

In August 2013, a solar water panel with a cold water pressure tank was installed. New shower fixtures installed, (all valves and hoses replaced), a Heatguard Tankbooster was installed as well. HeatguardŽ Tank Booster | Cash Acme

In October 2013, updated kitchen faucet new valve/hoses.

Prior to the repipe/wh install had galvanized pipe with very low water pressure, after repipe and new wh significant improvement.
 
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Old 12-26-13, 05:43 PM
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additional notes: the heatguard tank booster has its own shut off valve so no additional cold water is added to the hot water line. no change in pressure is noticed with it on or off
 
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Old 12-26-13, 06:13 PM
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Is the hot water pressure low throughout the house? Or just the kitchen?
 
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Old 12-26-13, 06:25 PM
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Hot water pressure is low throughout the house, single running faucet is low pressure, two significantly slows to a low flow, three stops to slow trickle, four stops the flow
 
 

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