DIY condensate neutralizer questions
I have been thinking about building my own condensate neutralizer because a previous thread suggested that acidic condensate from a high efficiency furnace will eventually corrode the copper drains of my laundry sink (i have no floor drains).
Being in Canada buying a neutralizer device would cost over $100 while the materials to DIY should be closer to $10. My thoughts are to use a tall container drilled with some drain holes. For neutralization medium i was thinking limestone screening to increase surface area vs limestone rocks. I am hoping that in time they don’t just clump together and become impermeable but if this is not an issue in commercial devices i assume it won’t be an issue?
Here are my questions:
What pH will harm copper drains?
Many DIY sources list limestone as a medium but others mention marble chips. Is either or both acceptable?
What pH will these increase condensate to?
TIA
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The biggest question i need to know if what pH will damage copper pipes, if i have to i can buy and experiment and buy some pH testing equipment but i would need to know what level is safe to know if my DIY solution will work
Per the EPA.
https://www.epa.gov/dwregdev/drinking-water-regulations-and-contaminants
List of National Secondary Drinking Water Regulations
pH 6.5-8.5
Not my site so perhaps take it with a grain of salt.
https://www.plumbingsupply.com/ed-ph-acid-base.html
Q. "How do I know if my water is acidic?"
A. The telltale signs of acidic water (if you have copper pipe) are blue or green stains in the bottom of your sink or tub. If these appear or if you suspect you have acidic water, then a simple pH test will tell you whether your water is acidic or not. You can get a pH test kit at most any pool supply store. If your water has a pH of less then 7 then it is considered acidic and should be treated.
Q. "What is Calcite and Corosex?"
A. Calcite and Corosex are both mineral substances that are found commonly in nature. Calcite is also known as food grade Limestone, and Corosex is a food grade magnesium oxide .
Q. "My PH is 6.4. How do I know if I need a Calcite or a Calcite/Corosex system?"
A. In most cases only Calcite needs to be used for pH balances between 5.9 and 6.9. However, if you are using just Calcite and find your pH is still falling below 7 then you can always add Corosex (magnesium oxide) to your system.