David, Kurt, et al,
If I am understanding your question correctly, the Kinetico brand of
_non-electric_water softener would fit the bill precisely. It is my
understanding that the entire (extensive) line of Kinetico products are dual
_resin_ tank machines. The huge benefit to this dual resin tank design is that
the control head (as well as the resin) sees only softened water unlike a
single resin tank machine in which the control head never sees anything but the
untreated water you are trying to correct. So while you pay more for the dual
resin tank design it lasts way longer and the life cycle cost is less. Plus, in
the words of the currently fashionable ads, the benefit from the reduced
maintenance (by you or others) "priceless".
My compliments to solve a water quality problem. Tremendous benefits for every
other water using appliance, valve, and faucet in the dwelling. You might
consider putting the softener on the hot water only (as scale is formed in
direct proportion to the amount the water is heated- compare the hot and cold
pipes when you are doing repair work to convince yourself of this) and
naturally lower the temperature of the hot water source to _only_ using
temperature to save even more. Most people, myself included, can then turn on
only the hot water faucet to bathe. What is the purpose of heating the water
(with a fossil fuel) at the tank/tankless/boiler only to add cold water to cool
it down at the other end?
Bill Loesch
Solar 1 - Saint Louis Solar
----- Original Message -----
From: Kurt Albershardt
To: RE-wrenches
Sent: Thursday, February 26, 2009 9:57 PM
Subject: Re: [RE-wrenches] Efficient water softener?
On 2/26/09 1:30 PM, David Palumbo wrote:
I have an off-grid customer with a need for for a non-electric, or very
efficient electric, water softener.
Lots of options there if you don't need time based regeneration. Regen
typically follows one of the following scenarios, listed in ascending order of
cost:
1. Time only (regen at a perset time and day regardless of water use.)
2. Flowmeter only (regen after a praticular number of gallons regardless of
time or date.)
3. Time and flowmeter (regen only after waking or business hours but before
media runs out of capacity, sometimes based on floating averages.)
#1 will be familiar to many residential softener owners of yore, who may
recall the famous 'guest button' that told the softener there was more flow
that day. It requires power all the time.
#2 can be completely mechanical (flowmeter spins the counter gears and
opens/closes valves using water power.)
#3 requires power all the time (but frequently has added benefits like a
totalyzing meter.)
The ultimate solution for off grid is a twin tank softener (a smaller version
of the type frequently seen in commercial or industrial applications. These
have a number of benefits:
Backflushing is done with softened water, improving the quality of the flush
and prolonging the life of the media.
Regen can happen at any time of the day or night and the system (if
appropriately sized) will deliver treated water 24x7.
Regen never happens unless the media is depleted, minimizing salt usage (and
minimizing landscape poisioning if the softener drains to anything other than a
muicipal sewer.)
If the budget is there, have them buy a twin tank system based on a Fleck
9000 valve (with the mechanical timer - I bought the electronic one and while I
like the features, I am starting to regret the phantom load it married me to.)
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