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Old 01-27-2018, 04:00 PM
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Default Water Filter

I am looking for a way to make a water filter/purifier for home.

A couple of months ago they started chlorinating our water, so now it smells and tastes like a swimming pool.
We bought a small charcoal filter jug for drinking water, which works well.

We would like a bigger filter that I can introduce to the water line and thereby avoid having to keep filling the jug.
I can get one easily enough and fitting it isn't a problem, the cost of the filters however is almost the price of the entire unit.

I recall seeing something in an old Popular Mechanics about a salt purifier from the 40,s or 50's.

So far I haven't found anything via google. I could be putting the wrong thing into the search for all I know.

Anyone know what they are called, how they work, can I build one?
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Old 01-27-2018, 04:09 PM
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I use one of these on my RV. It would be easy to plumb it into a waterline at home.
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Old 01-27-2018, 05:12 PM
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Quote:
Originally Posted by AJinNZ View Post
I am looking for a way to make a water filter/purifier for home.

A couple of months ago they started chlorinating our water, so now it smells and tastes like a swimming pool.
We bought a small charcoal filter jug for drinking water, which works well.

We would like a bigger filter that I can introduce to the water line and thereby avoid having to keep filling the jug.
I can get one easily enough and fitting it isn't a problem, the cost of the filters however is almost the price of the entire unit.

I recall seeing something in an old Popular Mechanics about a salt purifier from the 40,s or 50's.

So far I haven't found anything via google. I could be putting the wrong thing into the search for all I know.

Anyone know what they are called, how they work, can I build one?
"Salt Purifier" sounds an awful lot like a water softener. A water softener introduces KCL or NaCl brine to make the Calcium and Magnesium ions drop out of the water (these ions are what makes water "hard").

As far as I know, the only way to get chlorine out of water is to run it through a charcoal filter. The water is run through the filter and the chlorine sticks to the charcoal. These filters can be disposable cartridges or fullsize units the size of a large welding gas bottle or larger that can be backwashed and regenerated a limited number of times.

Our well water has anerobic iron bacteria in it. We treat the water to 100 ppm of chlorine in a holding tank using tablets (like pool tablets), then run the water through a charcoal filter. Our household system backwashes every night and needs to be rebedded every 5-7 years. The filter media is a combination of pea gravel, sand, and charcoal that is layered in a specific order to keep the charcoal in the filter can and still let the water through. Sadly, our water still has the Ca and Mg ions that make the water hard, but the charcoal filters out the slight sulfur smell our water has as well as the chlorine and iron bacteria.


It works well until there is a demand for water during the backwash cycle. During the backwash cycle, the filter is bypassed, introducing chlorine dosed water but unfiltered water into the house plumbing. This happens when someone flushes a toilet on a nocturnal visit, or the backwash cycle timing gets off too far. The timer runs on line power, and our rural service is subject to random outages. Over time the electrically driven mechanical timer can be off several hours...
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Old 01-27-2018, 05:19 PM
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RED caddy RED caddy is offline
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I bought 2 filter element holders at Not so low's, spliced them into the out flow side of my water softener, kinda like a "polisher". (I ran the clear body ones at first, but now, because of algae growth, I use opaque filter canisters.) I thought the UVA would kill the green growth, thru the clear plastic canister, I was wrong. That's what the chlorine tabs in the holding / degassing tank do.

I run a 30 micron fiber filter element first, then an activated charcoal filter, then into the supply line to the house.

This setup takes ALL the taste and odor out of the house water. It's not quite as good as the whole house RO setup I put in Mom's house, but it's close. (Tap water, on the island, is super chlorinated then run thru a collection of filters, including green sand, just like your pool water. during high use times, it's really rank)

I get about 3-4 months out of a pair of filters. The ground water here in paradise sucks, high iron, 12 PPM entrained, high sulfur 60 PPM gaseous, even lead and benzene trace. My softener / aerator does a good job, but the charcoal filter really helps the taste and clairity.

The filters run $12 to $14 per two pac, not much considering I don't smell or taste chlorine or sulpher.

RED
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Last edited by RED caddy; 01-27-2018 at 05:25 PM.
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  #5  
Old 01-27-2018, 07:12 PM
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Thanks for the replies.

Our water has a lot of iron and some lime I think. They remove most of the iron before it gets into the system but it still has enough to discolour some things.

The chlorine is the thing we hate, before that it was good. I will look at an inline filter from the plumbing supplies.
If I could get replacements for 12 bucks I would be pretty happy, but that isn't going to happen.

A whole house unit it thousands to install and the filters are horrendous.
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  #6  
Old 01-27-2018, 08:59 PM
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If the water was heated the chlorine would be driven off, right?
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Old 01-27-2018, 09:28 PM
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I wonder what a set of diodes, and a line cord (110 vac)
would do ?

Electro plate out the iron and such ?

Split the chlorine ?
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Old 01-27-2018, 09:48 PM
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Aerate it.
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  #9  
Old 01-27-2018, 10:07 PM
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My aeration system removes most of the iron and sulfur dioxide odor (poor mans deionization) but the activated charcoal filter really cleans up the taste from some dissolved minerals and trace chemicals (petroleum) pollutants.

My water treatment system is working very well right now, but each year I must re configure or adjust back wash etc. because of salt water incursion in our ground water. As our population gets ever more dense, and new comers want lush green tropical lawns around their new Mc Mansions, water quality goes down and becomes ever more expensive.

My little piece of paradise is trying to ban deep water turbine pumps, used for irrigation, because every summer many of our wells go dry as the aquifer level falls due to over watering of lawns.

RED
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Old 01-27-2018, 10:25 PM
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Our water is actually pretty excellent. But, SWMBO had issues with the Chlorine taste when we went from well water to city water. We just have a 2 stage Whirlpool undersink unit in the kitchen with a primary+a charcoal second stage to kill the Chlorine taste. It works great we go though a set of filters about every 8 months to the tune of about $50.
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