Swcg before heater

UKjames

Silver Supporter
May 1, 2020
221
United Kingdom
Pool Size
44000
Surface
Vinyl
Chlorine
Liquid Chlorine
I know best practice is after the heater but How bad is this in practice if your pump is always set to run when the swcg is running plus a bit of pump overrun when the swcg turns off.

I had seen somewhere in here I think that the after heater is based on puck feeders that are acidic and so bad for copper heat exchangers.

A lazy plumbing approach for me would be to put it before as that’s where there’s more space.
 

Texas Splash

Mod Squad
TFP Expert
LifeTime Supporter
Jun 22, 2014
33,841
Texas, San Antonio/Marion, South-Central Area
Pool Size
17888
Surface
Fiberglass
Chlorine
Salt Water Generator
SWG Type
CircuPool RJ-45 Plus
James, while it is true there is a district difference between the acidity of a tab feeder versus an SWG, placing the SWG at the end of a return chain of equipment is ideal. Some could argue that depending on the pump water movement (GPM) and output % setting of the SWG it may be okay, but that's a risk not usually taken. I think you'll find most, if not all, SWG instructions are very clear about placing the cell last. At best, there may be an option to run the cell in parallel to the heater, but not in front.
 

Newdude

Gold Supporter
TFP Guide
Jun 16, 2019
11,558
NY
You don’t want the ‘superchlorinated’ water/gas going through your heater core before it has a chance to mix well and be completely diluted (y)

Can you install a vertical kit (possibly even sideways) ? Easy peasy and it buys everyone that extra space.
 

Nikilyn

Bronze Supporter
Sep 3, 2018
1,157
Gilbert, AZ
Pool Size
17000
Chlorine
Salt Water Generator
SWG Type
Pentair Intellichlor IC-40
You don’t want the ‘superchlorinated’ water/gas going through your heater core before it has a chance to mix well and be completely diluted (y)

Can you install a vertical kit (possibly even sideways) ? Easy peasy and it buys everyone that extra space.
Vertical kit? Do you need something special for it to be vertical?
 

sktn77a

Gold Supporter
May 16, 2010
2,251
Chapel Hill, NC
As you say, the concentration of chlorine generated by a SWG is much lower than that generated by a tab feeder (which is where the original recommendations came from). But if there is any opportunity to place it after the heater, I would do that anyway - the constant exposure to even low concentrations of chlorine isn't good for the copper heat exchangers in the heaters.
 
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