I Don't Understand How Flushing Sediment Can Work?

Discussion in 'Water Heaters and Softeners' started by CluessHomeowner23, Mar 22, 2019.

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  1. Mar 22, 2019 #1

    CluessHomeowner23

    CluessHomeowner23

    CluessHomeowner23

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    I have a very hard water and hot water tank that is filled with sediment. It's very loud whenever it heats the water (sounds like small bombs). I've followed the instructions on the web to drain and flush it and while a few specs of rock-like gunk came out....when I fire it all back up....it is as bad as it ever was.

    Can someone help me understand how this is supposed to work?

    This rock like stuff doesn't float. It's heavier than water, right? So how would filling up the tank with some cold water and opening the valve get them out?
     
  2. Mar 22, 2019 #2

    voletl

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    flushing a water heater only works when you do it consistently every year when you let it build up to your situation it does absolutely nothing
     
  3. Mar 22, 2019 #3

    CluessHomeowner23

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    Thank you voletl!

    That certainly matches what I'm seeing. I don't know when the hot water tank was installed, and it wasn't something we caught during the home inspection (we turned on the hot water, it was hot, we figured it was all good - but we didn't use enough hot water to hear the loud 'rumbling' noises it makes).

    Can you tell me, is there anything else I can do that would save me the cost of a new water heater?
     
  4. Mar 22, 2019 #4

    voletl

    voletl

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    There are other methods to flush like taking a garden hose and running water into the tank from the drain but even that I've seen ehhhh results
     
  5. Mar 22, 2019 #5

    CT18

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    Drain the tank. Then open the cold supply back up and see if it will stir up what is sitting on the bottom below the center of the drain line.
     
  6. Mar 28, 2019 #6

    ExtraMilePlumbing

    ExtraMilePlumbing

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    Also make sure its not a condensation sound(vent contensation driping on burner makes loud banging sound)also corroted or mismoved flue baffle intank makes noise
     
  7. Mar 29, 2019 #7

    frodo

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    All good suggestions above

    This is my method.
    drain the water heater, remove the plastic drain valve and throw away
    w_h_drain.png
    while you have the plastic valve removed
    take a 3'8'' pipe or rod stick in the hole
    and vigorously scrap the bottom / sides of tank

    replace with a 3/4 x 4 '' brass nipple and a 3/4'' brass ball valve with hose connection

    brass_nipple.png brass_ball_valve.png

    After replacing the valve, and rodding the sediment
    fill the tank with water and then empty the tank completely
    remove nipple, re rod tank
    flush
    you should see lots of stuff draining out the hose
     
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  8. Mar 29, 2019 #8

    chiraldude

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    I remember some manufacturers used to sell water heaters with a mechanism inside where the water inlet would rotate and supposedly stir up the sediment to keep it from building up.
    Was that a gimmick that never worked? Does anyone still make them?
     
  9. Mar 29, 2019 #9

    frodo

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    never heard of it
     
  10. Mar 30, 2019 #10

    MASTRPLUMB

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    Check "STATE" Water Heaters, and "BRADFORD WHITE" Hydrojet
     
  11. Mar 30, 2019 #11

    Mikey

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    When I replaced a WH in a previous home, I cut it open just to see what was inside. I wish I had taken pictures, but that was in pre-cellphone days. Anyway, there was a solid buildup of rusty cement-like silt about 18" deep, which encased the lower element (bad!). I've been pretty careful to drain subsequent WHs at least annually. I don't drain them to empty, but I leave the incoming water on (to maintain pressure), fully open the ball valve on the drain (see Frodo's post #7 above) and drain a gallon or so at a time into a white bucket to see what I've got. When the bucket stays clean, I'm done. On well water, it took a few shots, even when I upped the schedule to twice a year. On city water now, I haven't had to drain more than a couple gallons a year to come up clean.
     
  12. Mar 30, 2019 #12

    frodo

    frodo

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    Just call me Macgyver Professional Supporting Member

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    Water heaters never die, they just change occupations

    water_heater_smoker.png
     
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