Low Salt SWG

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M

miatawnt2b

0
Jan 18, 2016
159
Tucson, AZ
Moved from here.
Anyone have any further info on these things? I personally would give up some efficiency for less salt content in the pool.
JamesW made an interesting comment in post #6 regarding lowering the salt concentration in the pool and setting a t-15 cell to a T9 in the software on the panel.
 
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It looks like the Hayward Low Salt System is sold in Canada and other countries outside the US.

Home - CA

Hayward offers environmentally responsible, cutting-edge pool and spa equipment for residential and commercial, in-ground and above-ground pools.
www.hayward-pool.ca www.hayward-pool.ca
 
I have this unit and plan to run my salt level in the 1500 ppm range. I haven't opened the pool yet so don't have operational experience with it. You can't buy these from US retailers, but you can buy them on Ebay, which is where I got mine. My assumption is that you won't get any warranty support if you operate them in the US.
 
BubbaBasco said:
I have this unit and plan to run my salt level in the 1500 ppm range. I haven't opened the pool yet so don't have operational experience with it. You can't buy these from US retailers, but you can buy them on Ebay, which is where I got mine. My assumption is that you won't get any warranty support if you operate them in the US.
Click to expand...

Let is know how it works for you.

The specifications say it is rated for a 30,000 gallon pool which may be undersized if your pool is 30,000 gallons. We recommend a SWG be rated at least 2X the pool size. You will likely need to run the SWG at close to 100% and your pump 24/7.
 
BubbaBasco said:
I have this unit and plan to run my salt level in the 1500 ppm range. I haven't opened the pool yet so don't have operational experience with it. You can't buy these from US retailers, but you can buy them on Ebay, which is where I got mine. My assumption is that you won't get any warranty support if you operate them in the US.
Click to expand...
1500 ppm is way below the recommended salt level. I can pretty much tell you it wont work with that level.
 
Chickinvic said:
For the low salt versions they sell in Canada 1500 ppm is allowed (operates at 1200 - 1800 according to the Hayward site).
Click to expand...

It just gives lower CL output at lower salt ppm. They use a T-15 cell that is rated to 40K in the standard unit while the low salt unit is rated to 30K. I am sure 30K is at 1800 ppm and 1200 ppm will generate less maximum chlorine.
 

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I'm in agreement here. You can't plumb them in series. The salt cell breaks down NaCl and H2O into Hydrogen and Hypochlorous Acid (HClO).
Once the water passes past the first cell, the water no longer has the same concentration of salt for the second cell to efficiently perform electrolysis. Plumb them in parallel with a flow switch before each.
 
Series is fine. There's no significant difference in the amount of salt before or after the cell. A few ppm at most.

A cell does not break down NaCl. There's no NaCl in the water.

As soon as the salt goes into the pool, the Na and Cl separate and go their own way.

The cell oxidizes the Cl into chlorine gas.

The Na (sodium) is not part of the process.
 
I have not personally dove into the pure chemistry behind this myself, but I can say that the Na and the Cl in salt do not just simply break apart by adding salt to the pool. The salt cell breaks that chemical bond through electrolysis. Once the Hypochlorous Acid sanitizes the pool, at that point the Na and Cl rebond to form a salt molecule so the process can start again. That's why you don't have to re-add salt except in the case of water loss.

There is a chemical equation about 1/3 of the way down this page.
www.riverpoolsandspas.com

What is a Saltwater Pool? Chemistry, Lifespan, Cost, & More

How does salt water in a pool work? What is a salt chlorine generator for a pool? In this article, we discuss salt chlorinators (also called salt chlorine generators) and how they work.
www.riverpoolsandspas.com www.riverpoolsandspas.com


-J
 
The Na and Cl definitely break apart as soon as the salt dissolves in the water.

The chloride ions lose an electron at the cell plate to form chlorine gas Cl2.

Electrolysis is the process of removing an electron from the chloride and putting an electron on the hydrogen ions that make contact with the opposite side of the cell plates.

So, basically, a chloride ion is on one side of the plate and a hydrogen ion is on the other side of the plate and an electron moves from the chloride ion through the plate and onto the hydrogen ion.

Anode 4Cl -> 2Cl2.
Cathode 4H2O -> 2H2 + 4OH.
2Cl2 +2H2O -> 3H + HOCl + OCl.
HOCl + OCl + uv light -> O2 + H + 2Cl.
Following the process, we can see that there are 4H and 4OH created, which nets out to ph neutral.
 
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