Boy did I mess this up! in trying to delete the multiple posts, I managed to delete the whole thread! So Sorry!
Here it is:
Here it is:
gregs said:Sat Sep 08, 2007 11:50 am
I am looking for some info regarding chlorine levels and there effects on copper piping. I am going to install a fiberglass pool this fall with a swg. One thing I am considering is to tye my homes geothermal heat pump system into the pools pump/filter circuit to use it like a heat pump pool heater. Currently it is set-up as an open loop system connected to my well and just returns the water back out into the woods. I would plumb it in so that I could go between the pool and the well system if the pool is getting to hot. My concern is with the effect of the chlorine levels on the copper piping and heat exchanger. I have been told that you can run the FC levels very low with a fiberglass pool. How low can the levels be and still perform correctly? I have contacted the Copper Pipe Association to see if the have a maximum ppm level for standard copper piping. I will probably post this in a different spot as well, so if the admistrator wants to take it out and move it to a better location thats fine. Thanks
JasonLion said:Sat Sep 08, 2007 12:12 pm
The available information is somewhat limited, as salt corrosion is normally reported at very low salt levels as compared to sea water, while a typical SWG uses levels in between those two.
The best I have been able to figure out is that copper is fine at salt levels below something around 6000 ppm, although salt can somewhat aggravate corrosion from other sources. Copper-nickel alloys are generally fine even at sea water levels of salt.
Many of us have heaters with copper heat exchangers and 2500-4000 ppm of salt in our pools and don't experience any obvious problems.
Low PH is a far more serious problem for copper piping. If the PH falls enough below 7.0 there can be significant and fairly rapid damage to copper pipes.
20K gal, vinyl, 3/4 HP pump, 18" sand filter, AutoPilot Total Control SWG, Dolphin Dynamic cleaning robot
Author of The Pool Calculator. Other handy links: TF Test Kits, The Stickies