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  1. #1
    Join Date
    Jan 2010
    Location
    Redding, Ca.
    Posts
    3

    Default Sand/Grit from hot water faucits

    We have City Well water that is not filtered. After moving into our new home in 2003 we always had discoloration in our hot and cold water caused by iron and manganese in our well water. We had a whole house "big blue" filter with a 50/5 micron filter installed on the city water supply line.The filter eliminated the water discoloration.
    Now we have a problem with sand or grit in all of our hot water lines, but not the cold. We replaced the water heater thinking that was the cause. No luck problem still exists. The house is built on a slab with pex in the concrete and a recirc line for the hot water. The plumber has been here numerous times but has no solutions or ideas of the cause of the sand/grit. Any ideas how to fix this problem or the cause?

    Kudnu 88

  2. #2
    Join Date
    Jan 2010
    Location
    Wisconsin
    Posts
    80

    Default Re: Sand/Grit from hot water faucits

    Hello, Have you tried placing a sediment filter inline to see if it catches the sand or grit? It is very strange that you would be getting it only from the hot side. If sand/grit is in the system, it is coming from the cold main in to the house. you say you have city well, does that mean you have your own well outside? If so, it could be sucking sand/grit from the foot valve down inside the well point. I would install a sediment filter(cloth string syle) just after the cold water enters your home and see what happens then. Good Luck.
    Hidden Content GregC, President/Founder of Hidden Content

  3. #3
    Join Date
    Jan 2010
    Location
    Redding, Ca.
    Posts
    3

    Cool Re: Sand/Grit from hot water faucits

    Greg, Thank You for the recommendations. The city has 14 well's that it draws from depending on the demand. My main line into my house from the city is like any other city supplied water service. The city is aware of the mineral problems but chooses not to correct it, city politics, as usual. My plumber and I talked about a sediment filter but decided against it in that we only have the problem on the hot water side.One of his thoughts were that we had sand in the hot lines in the slab from initial construction in 2003 that had hardened and only now may becoming loose and visable.Very strange and problem.

  4. #4
    Join Date
    Jan 2010
    Location
    Wisconsin
    Posts
    80

    Default Re: Sand/Grit from hot water faucits

    Hello, Yes that is a great thought! Can you flush out those in ground lines? or maybe place a sediment filter on the HOT line coming out of the water heater. This could at least trap the sand after leaving the water heater? Then maybe once its gone you could remove it. Just a thought.GregC
    Hidden Content GregC, President/Founder of Hidden Content

  5. #5
    Join Date
    Aug 2007
    Location
    The Great White North
    Posts
    4,045

    Default Re: Sand/Grit from hot water faucits

    Quote Originally Posted by kudnu 88 View Post
    We replaced the water heater thinking that was the cause. No luck problem still exists. The house is built on a slab with pex in the concrete and a recirc line for the hot water.
    Kudnu 88
    Does this grit appear in the water heater as sediment ?
    It might be worth while to temporarly disconnect the recirc line to see if that may be contributing to the issue.
    Last edited by canuk; 01-17-2010 at 04:31 PM.
    "" an ounce of perception -- a pound of obscure "
    - Rush

  6. #6
    Join Date
    Jan 2010
    Location
    Redding, Ca.
    Posts
    3

    Unhappy Re: Sand/Grit from hot water faucits

    Greg & Canuk, Thank You for the inputs. We have flushed the hot water line for 8 hours now (over a 3 day period). We drain a small amount of hot water an then refill the HW tank with a hot fauset turned on and as the air goes through the line copious amounts of sand/grit are visable.There is sand/grit visable as we drain the HW tank. We have turned the recirc pump off for a couple of days with no noticable difference.
    Kudnu 88.

  7. #7
    Join Date
    Aug 2007
    Location
    The Great White North
    Posts
    4,045

    Default Re: Sand/Grit from hot water faucits

    Quote Originally Posted by kudnu 88 View Post
    Greg & Canuk, Thank You for the inputs. We have flushed the hot water line for 8 hours now (over a 3 day period). We drain a small amount of hot water an then refill the HW tank with a hot fauset turned on and as the air goes through the line copious amounts of sand/grit are visable.There is sand/grit visable as we drain the HW tank. We have turned the recirc pump off for a couple of days with no noticable difference.
    Kudnu 88.
    Since there is this grit in the hot water tank then either the cold water supply to the tank needs a filter or perhaps minerals in the water are reacting to heating inside the tank.

    Just aguess.
    "" an ounce of perception -- a pound of obscure "
    - Rush

  8. #8
    Join Date
    Jan 2010
    Posts
    163

    Default Re: Sand/Grit from hot water faucits

    Is it possible that the whole house filter was installed at the wrong point in the piping?

    It should be right after the main shut off, before any tees.

    From experience, I happen to know that the dumbest mistake you can make is usually the eaiest one to make.

  9. #9
    Join Date
    Feb 2010
    Posts
    1

    Default Re: Sand/Grit from hot water faucits

    We have almost the exact problem. A filter on the incoming water line, a convection recirculating system (no pump) to keep hot water near faucets and a blue-white crystalline sand that collects in faucet aerators and plugs them up. We have replaced solenoid valves on the dishwasher several times because they fail from packed grit and we are worried about washing machine and other appliances. I plan to install filters on the line coming from the water heater and ahead of dishwasher and washing machine. I also plan to drain the water heater tank this coming week to try to capture enough of this stuff to send off for analysis. I will post results when I get them. Any other recent suggestions than appear on this thread? Oh, we are also on well water from our small village in southwestern Ohio which is also untreated. The main line filter does remove the iran/manganese crud that comes in. We also have a water softener downstream from the main filter. Plumber tells us that the resin in the softener is red/brown in color so not the source of the sand problem. The house was built in 1951 but the problem has existed for only the past few years. Any other thoughts?
    Last edited by rgschmidt; 02-06-2010 at 04:09 PM. Reason: Added more information

  10. #10
    Join Date
    Feb 2012
    Posts
    1

    Default Re: Sand/Grit from hot water faucits

    All the city water I have seen has some grit. The reason it is often noticed on the hot side only is simple. Cold water is used on demand; however, hot water is stored in the water heater were the grit has time to settle out and build up on the tank bottom over time. Since hot water is supplied from the bottom of the tank the grit is picked up. Also, the anode in electric water heats can react with minerals in the water and create 'grit'.

    Solution 1: Flush your water heater once a year (most manufactures recommend this). DO NOT FLUSH your water heater if it is more than a few years old and has never been flushed, this can cause your tank to spring a leak.

    Solution 2: Install a water filter on the 'output' side of your water heater.

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