Stainless pump for DHW
Comments
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Awesome, thanks for the link..
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Interesting, anything that company has for residential use is only listed for domestic water heating. I have not found anything listed for potable anywhere. I don't think it exists.
If it's fine for domestic water heating it should be fine for my purpose right ? In all my research, all the articles written, the company's selling and building these systems, and all the talk about using heat exchanges no one ever speaks about what exchanges are being used other that plate.
I also read your not supposed to use hot water for drinking or cooking anyway.
Still researching while I slowly go insane…. LOL… It's not supposed to be this difficult, I just want to get it right,
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Hi, If you look up "domestic water' you'll see it is essentially water used for any purpose around home. Potable, meaning drinkable water is a subset of domestic. The words often get used interchangeably. No need for hair pulling 🤪
Hot water depends on how it has been heated. If you have a tank with an aluminum anode, or keep the tank cool enough to promote bacterial growth, I wouldn't drink it. If it has a magnesium or powered anode and is kept hot enough, go ahead, cook with and drink it. 🥳
Yours, Larry
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Ha !! Muddy the waters a little more for me.. LOL…Ok I see, I do use aluminum zinc anode because of well water that will smell like rotten eggs if I use magnesium, it's very subtle but its there. So I switched to A/Z and it went away.
BTW I wrote a manufacture and asked to explain what the domestic water rating was and if it included potable water and I was told it did not. Leading to more confusion …
Ok so an exchanger listed for domestic hot water and I'm good to go..
thank you for chiming in..
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To muddy the waters a bit more… a powered anode has the benefit of interfering with the cycle that creates odor. Aluminum, to be blunt is a neurotoxin. So, I'd replace the al/zn rod with a powered one and be happy 😇
Yours, Larry
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Then why do they sell these things…
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what's cool enough to promote bacterial growth?
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Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
Hi, My understanding is manufacturers want their equipment to last through the warranty period, with the least amount of trouble. Aluminum anodes last longer in more conductive waters and produce less odor causing hydrogen gas. When I've talked with them about the dangers of aluminum, they come up with different science. I'm cautious and with health; it's guilty until proven innocent. You'll find a booklet on the dangers of aluminum in the library here. It's from the 1920s, written by a doctor.
Yours, Larry
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Yeah.
It's not like anyone ever sold asbestos or leaded paint or fuel until they were forced to stop in one way or another.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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wow, pretty hot…
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I must have had aluminum from the factory, must have been 9 years old when I thought to check the anode. It was missing.. lol
we'll see if the odor comes back now that im using magnesium.0 -
Hi guys, am I ok using copper coming out of this stainless manifold outlet or do I need brass first, Im getting some conflicting answers.
thanks
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Technically, it's less than great.
However, I just screwed copper adapters into my stainless pump. Brass would probably be worse than copper in this case.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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what other options? Steel to a union??
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Off the top of my head?
Some kind of plastic fittings like pex with adapters.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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Hi, From the chart it looks like copper is closer to stainless than the likely brasses are, so is better, but only by a little. I work with all sorts of waters, and have not had problems mixing stainless and copper. Can I assume you're not using salt-softened water? 🙀
Yours, Larry
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Yes and no, this is on the loop heat side, going to try and fill with distilled water, then a little well soft water to pressurize..
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That is probably a plated brass valve on the manifold. Copper, brass, steel all can go into it.
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
Hi, Pure distilled water is "hungry". It alone would chew on metals in the system. You want some hardness in the water so it isn't hungry, or aggressive. I'm not sure what you mean by "well soft water". What is the TDS of your well water? Do you salt soften it? If the well water is hard, then mixing it with distilled can give you a nice mix that's not aggressive. You absolutely don't want any salt in the water. Hope that makes sense 🤨
Yours, Larry
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Yes when you purify water by RO, DI or by distillation the ph will drop. Possibly into the 5 range. However it will buffer back up on its own when exposed to the metals in the system. Even in an open contain er exposed to air the ph will rise.
Or add a ph up chemical.
Better yet a hydronic conditioner that will buffer and protect the wet components with a micro thickness film layer.
https://www.caleffi.com/sites/default/files/media/external-file/Idronics_18_NA_Water%20quality%20in%20hydronic%20systems.pdf
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream
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I think you may be right, I will look tomorrow..
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I have raw hard well water, then a water softener that uses salt to give me soft water.
Can I just use the raw well water that is filtered with string wound filter but not softened?
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Thanks I'll look into this..
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at least check the hardness
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
I can do that..
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for hydronics you want hardness under 10 gpg. I think Lochinvar suggests 5-7
One piece of good news about hard water, powered anodes work better, higher conductivity water.
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream1 -
Hi Guys, a family medical emergency has put my project on hold for now. However I do have something I would like to bounce off you guys.
I searched around for info on how to clean rust out of my whole house water filter housings. It was suggested to use Oxalic Acid so I ordered some. When It came in I read the warning label. This is some serious stuff, with a warning to not ingest.
So I'm now wondering if I should not use this as my drinking water goes through these filters.. Or will a good rinse be sufficient ?
Are there any better options ?
Thanks….
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Thanks, I have a test kit so soon I will know..
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I use this product on my sight glass, in heat exchangers, and tea kettle.
Hercules Sizzle can also be used in water heaters and potable water devices
Follow the directions for blending and flushing
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream0 -
That sounds safer if its listed for potable water, CLR is Muriatic Acid…..
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The SDS dosen't look so good, if not safe to depose of in ground how can it be good for potable. I think I'll have to start a new thread for this to get more exposure. Thanks for the input..
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Because you're washing 99% of it out before you run water through the system, and the product is miscible with water. If you dump it straight on the ground it'll kill grass etc.
If CLR is muriatic acid, that's the same as stomach acid, essentially. And if it's super diluted, it's not going to bother anything.
This reminds me of when people make the comment about soda eating paint, and that if it can eat paint, what does it do to your stomach. Soda doesn't have anything on stomach acid when it comes to caustic burns etc. Of course, low pH drinks aren't good for your teeth, but your stomach doesn't care.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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ok thanks I understand that now, would the same apply to the Oxalic acid as if is found in food and comes from food??
Im kinda stuck with it as I can't return it.. otherwise I could get CLR..
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If it's a product sold for this purpose, I'd use it as directed.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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Hi, Citric acid is used as a descaler. Mag Erad is a brand I'm familiar with that's used in water heaters. I'd not use oxalic acid unless it specifically says it is food grade. One ER visit might cost a bit more that the oxalic acid. 😐️
Yours, Larry
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That's what I use to clean my dishwasher all of the time.
It's incredible.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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You use Oxalic acid to clean your dishwasher ???
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No no, sorry.
I use citric acid powder to clean it.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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No instructions of any kind
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