In-floor manifold corrosion question (not tractor related)

[MinnesotaEric]

Eric, no login required. I got to read the link without any difficulty. And it is directly applicable to your issue.

In that case since I cannot see it, can somebody cut and paste?

 

[tigers2007]

Ospho works great. Don’t let it touch your skin. Wear eye protection. It will not only etch the concrete but eat it!

 

[fried1765]

Ospho works great. Don稚 let it touch your skin. Wear eye protection. It will not only etch the concrete but eat it!

Certainly do avoid getting OSPHO in your eyes!
It is not as dangerous however, as you project.

I have used OSPHO for years, and have often had it on my hands.
Gloves should be worn,...... but getting OSPHO on your skin is not a crisis.
Wipe it off with a wet paper towel.
If some OSPHO falls on concrete, wiping it up is all that is necessary.

 

[rademamj1]

In that case since I cannot see it, can somebody cut and paste?

Here it is from Roughdog:


Hello all:
I have copper pipes buried beneath the bluestone patio round my swimming pool. The pipes are filled with regular tap water, which we drain for the winter. The water is pumped through a heat exchanger to transfer the heat from the patio to the regular pool filter circuit. The idea is to cool the patio and heat the pool.
The copper pipes are connected to supply and return plastic manifolds, then by rigid 2" plastic pipe to and from the pump. The circuit also contains an air separator, which is a Tasko Air Scoop, made of cast iron, and an Amtrol Extrol Model 30 expansion tank. The copper pipes, the manifolds and most of the rigid plastic pipe are buried; the pump and the air separator are in the open air.
The expansion tank just fell off its nipple. The tank is completely rusted through all round the nipple. The nipple is firmly stuck in the Tasko. I'm hoping that a few days of penetrating oil will free it.
Neither I nor, I suspect, the swimming pool builder who installed this system, know anything (beyond high school chemistry) about electrolysis or osmosis. Can anyone in this forum help me understand what has happened here and suggest what I should do to fix the system? Many thanks, avhfj

 

[jaxs]

Edit: my link diies work either but it goes to the guy asking about "The expansion tank just fell off its nipple."

Roughdog, is this the discussion you linked to? your link wanted a login. Corrosion in hydronic system

Also, this is an in-floor PEX system. At this time it appears that only the manifold/plenum is crusting up. Each PEX run SHOULD (in God's grace we pray and hope) go into the floor and pop back out the floor as one single run without splicing. I cannot know if there is splicing or not, but my Errors and omission insurance doesn't want to experience a $120,000 repair bill because I failed due diligence to investigate and "own" or "understand" what is happening.

Seriously,do you think the court might award damages because you failed to determine if there is or is not a problem beneath the floor? If the National Association of Realtorsｮ Code of Ethics include's language leading us to believe that,they are silly. Who is supposed to fund your efforts in determining these facts?

 

[MinnesotaEric]

Eric, no login required. I got to read the link without any difficulty. And it is directly applicable to your issue.

What it looks like a lack of a proper grounding on the swimming pool. My case is multiple runs of PEX running embedded in a poured concrete slab. The PEX feed and return lines run into a brass/bronze manifold witch is connected by copper to a Weirs McLain boiler.

 

[MinnesotaEric]

[/COLOR]
Seriously,do you think the court might award damages because you failed to determine if there is or is not a problem beneath the floor? If the National Association of Realtorsｮ Code of Ethics include's language leading us to believe that,they are silly. Who is supposed to fund your efforts in determining these facts?

This stuff happens all the time. In this case, the buyers are remote and have never put eyes on the RE other than video sessions. At the very least I lose my commission and nobody likes working for free and then getting a bad rep while working for free.

 

[fried1765]

This stuff happens all the time. In this case, the buyers are remote and have never put eyes on the RE other than video sessions. At the very least I lose my commission and nobody likes working for free and then getting a bad rep while working for free.

Explain the situation to the remote buyers!
This should NOT be a deal killer issue!
I have cleaned this stuff for many years, in two different houses that I owned with hot water heat.
This is a clean up issue.....not a jackhammer the floor issue!

If I were the buyer, I might try to BS you and the seller to get the selling price down, but my action would be pure BS!
If I still lived in MN (I did from '67 - '91) I would consider making a very low ball offer, clean up the mess, and list it again for sale.

 

[MinnesotaEric]

Explain the situation to the remote buyers!
This should NOT be a deal killer issue!
I have cleaned this stuff for many years, in two different houses that I owned with hot water heat.
This is a clean up issue.....not a jackhammer the floor issue!

If I were the buyer, I might try to BS you and the seller to get the selling price down, but my action would be pure BS!
If I still lived in MN (I did from '67 - '91) I would consider making a very low ball offer, clean up the mess, and list it again for sale.

I'm moving forward assuming that you and my boiler making instructor are correct and that the issue is a clean-up concern, not a "we'll-lose-our-heat-in-the-middle-of-winter-and-die-from-exposure issue. Anyway, the home has a punch list of other concerns that are remedied straight forward and I'm suggesting to the sellers use "my people" for sorting those issues out so I can know that my buyers are being taken care of to the best of my abilities. This to say I texted exactly your method of cleaning up the corrosion, fried1765.

To everybody, thanks!

 

[fried1765]

I'm moving forward assuming that you and my boiler making instructor are correct and that the issue is a clean-up concern, not a "we'll-lose-our-heat-in-the-middle-of-winter-and-die-from-exposure issue. Anyway, the home has a punch list of other concerns that are remedied straight forward and I'm suggesting to the sellers use "my people" for sorting those issues out so I can know that my buyers are being taken care of to the best of my abilities. This to say I texted exactly your method of cleaning up the corrosion, fried1765.

To everybody, thanks!

I should also add that some cleanup will be a reoccurring situation.
Some very slight corrosion may occur after a year, and more likely after 3 or four years.
What your pictures are showing is corrosion from 2006 to 2020....a period of 14 years!
Just clean up again when necessary....but likely long before 14 years!