Gritty Well Water

Dear NH,
First off, I think your web site is more than helpful, its actually proved to be a necessary reference for me. However, I can't find the answer to a problem I am having with my water. When we run our water we get small red particles through all of the faucets (it is definitely noticeable when running hot water). I thought it might be sediment from the water heater, like your article said it could be (especially since we have a well and the house was newly constructed less than a year ago). However the problem is we have a tankless water heater. Our fuel is oil and our heating system is forced hot water. We installed 2 whole house filters, one right after the other just after the water tank. Short of getting the water tested, is there any advice you can give as to what this might be and/or how to stop it?

Dear E.A.M.,
Your problem is not uncommon with well systems, especially newly drilled ones. The process of drilling produces large amounts of sandy rock "grit"... the color of which depends on your local strata... e.g. the composition of the bedrock. The well diggers flushed out most of the grit in the well before it could be certified as a domestic water supply. Though the grit is most likely non-toxic (only testing can determine this for sure), large quantities of grit entering your pipes will clog faucet aerators, damage faucet shutoffs and wreck your dishwasher, washing machine and toilet inlet valves.

Because of the necessary imperfection of the aforementioned well-cleaning process, you will still get small amounts of this stuff coming through your pipes for years. This most noticeably occurs when the well is run dry by overuse. A fully depleted well has water entering it at higher-than-normal speeds from the depths of your well that are usually not dry, flushing grit into the well pipe from the surrounding bedrock. This agitated (and agitating) grit is pumped unfiltered into your water system to do its damage.

Whole house filters ARE the best solution to the grit problem and your installation of two should isolate your pipes from whatever evil your well pump may send them! Nevertheless you will still have grit appearing for quite a while since it has already settled into your pipes. Take heart... it will eventually disappear, never to be seen again. Except in your filters, that is, which should be changed at least monthly and no less than annually based on your observation of how much grit they collect.


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