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Old 09/08/2009, 08:03 PM   #1
Lightfox
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Join Date: Dec 2008
Location: Minneapolis, MN
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Single vs. Multiple tank replenisher

Greetings,

I am looking at buying either your single tank or multiple tank replenisher system, but am not finding much information in regards to how the setup works on the multiple system. Are there two liquid level sensors on the multi-tank setup?

I have a 350 gallon setup that currently has a 50 gallon fresh water siphon feed with a float for water top off and am thinking if I had the multi system, I could get rid of the 50 gallon tank and directly plumb the RO into the sump float, while also having a mix tank that automatically fills itself to the prescribed height.

Thanks,


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Old 09/08/2009, 08:56 PM   #2
SpectraPure
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See the hook-up and operations manual here (especially the diagram on page 15):

http://spectrapure.com/manuals/PRINT...LLC-MANUAL.pdf

We have had extremely good results with this setup, although some will say it's not a good idea to hook an RO system directly to a sump. They have usually been burned with TDS creep or inadequate safety back-ups.

The LLC-S provides a 1-inch difference in turn-on and turn-off levels (due to evaporation) and results in MUCH lower TDS creep than using JUST a mechanical float and ASO/Check Valve. Don't worry, 1-inch in a typical sump is usually less than 0.1% of the total volume of the entire system. Salinity will not be affected. Secondly, we also provide a float valve as a redundant back-up safety device.

We ARE comfortable using a float valve (that only passes RO/DI water and can't "crud-up") on a reservoir that will be filled once and left alone until it is salted-down and used for a water change. A second LLC-S on that reservoir could be added to provide a double safety back-up if the reservoir isn't on a water-safe floor.

The check valve in the reservoir branch gives priority to the LLC-S and the sump. The Mini-Bladder Tank acts as a ballast to prevent the ~pppssssttttt~ that a float valve produces just as it tries to turn off.

Once this system is installed, it's very cheap and easy to add multiple reservoirs, a storage tank and faucet for drinking water, or even the dog's water bowl.

When all output ports are closed, the ASO/Check Valve combo senses the pressure build-up in the output line and shuts of the feed to the membrane.

I hope this helps your understanding of our systems,

Scott
SpectraPure, Inc.


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Old 06/21/2011, 12:29 PM   #3
mr murphy
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Join Date: Apr 2011
Posts: 101
[QUOTE=SpectraPure;15671135]See the hook-up and operations manual here (especially the diagram on page 15):

http://spectrapure.com/manuals/PRINT...LLC-MANUAL.pdf

We have had extremely good results with this setup, although some will say it's not a good idea to hook an RO system directly to a sump. They have usually been burned with TDS creep or inadequate safety back-ups.

The LLC-S provides a 1-inch difference in turn-on and turn-off levels (due to evaporation) and results in MUCH lower TDS creep than using JUST a mechanical float and ASO/Check Valve. Don't worry, 1-inch in a typical sump is usually less than 0.1% of the total volume of the entire system. Salinity will not be affected. Secondly, we also provide a float valve as a redundant back-up safety device.

We ARE comfortable using a float valve (that only passes RO/DI water and can't "crud-up") on a reservoir that will be filled once and left alone until it is salted-down and used for a water change. A second LLC-S on that reservoir could be added to provide a double safety back-up if the reservoir isn't on a water-safe floor.

The check valve in the reservoir branch gives priority to the LLC-S and the sump. The Mini-Bladder Tank acts as a ballast to prevent the ~pppssssttttt~ that a float valve produces just as it tries to turn off.

Once this system is installed, it's very cheap and easy to add multiple reservoirs, a storage tank and faucet for drinking water, or even the dog's water bowl.

When all output ports are closed, the ASO/Check Valve combo senses the pressure build-up in the output line and shuts of the feed to the membrane.

I hope this helps your understanding of our systems,

Scott
SpectraPure, Inc.[/QUOT

how do i connect r.o unit to resovoir without tds creep from r.o unit turning on and off using float valve


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