The Things I See Out There
Anyone ever see an arrangement like this?
You can choose to do what you want, but you cannot choose the consequences.
Comments
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that isn't even the brand that home depot carries
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what's the flo check for? i don't see any evidence that they are making dhw with that boiler.
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A tank for each one of the little people to the left, to watch over?
I did see a bunch of #30 on their side on a unistrut cradle once.
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream
3 -
Old gravity system? Probably lots of expansion/water volume. As strange as it looks, easier to source #30's, then 60's or larger, when replace time comes. Lots of supply place, don't carry anything larger than #30.
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" If the relief valve blows add another tank"
I do like the 1/2" copper supply to return bypass
The ball valve handles removed to prevent balance tampering.
0-30 psi ASME tanks are not required. Maybe that is why they used multiples of the cheaper tanks
Only 1 circulator so no need for a flow check. "We put those on every job but I don't know why"
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That's the staged-admittance configuration. Charge each one a few lbs higher than the next & when one is full the next one takes over.
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4- # 30 Extrol= 10 gallon acceptance $252
1- EX 90= 11.3 gallon acceptance $224.
The # 30 are easy to find, not so much with the larger sizes
Also the #30 and # 60 are the same 2.5 acceptance. You get a larger air space with the # 60
Bob "hot rod" Rohr
trainer for Caleffi NA
Living the hydronic dream
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I've hung double tanks in a pinch, but 4??? Looks like a Bunch of bananas 🍌 😆 . Mad Dog
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All that work and no valve w/drain to isolate the tanks. I don't think they do much service work.
Also, no support for the tanks. Those are two of my pet peeves: isolation and support.
Insulation would have been a good idea.
8.33 lbs./gal. x 60 min./hr. x 20°ΔT = 10,000 BTU's/hour
Two btu per sq ft for degree difference for a slab
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The flo check could’ve been there because they used to have a coil. Or the boiler maintains temperature.
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i think i see some hanger iron in there
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In my best David Attenborough:
"Here we see thermal expansion tanks in their natural habitat. While tanks are usually solitary creatures, here we see the rare exception of a strong family pack, signifying that the individuals determined their survival would be better as a pack, rather than on their own"
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This seems like as good a place as any to share amtrols sizing tools! It's not rocket science, and if it is you made a big mistake!
2 -
The local RE Michel stocks a floor #30 and can get up to a 90 in a day or two. That’s where I get them. But I also doubt that they would have had four these #30’s on the shelf.
I wonder if they started with one and then kept adding them until the relief valve stopped releasing.
Bob Boan
You can choose to do what you want, but you cannot choose the consequences.3 -
The only problem is if it’s an old gravity system, then you have to calculate the water volume in the system. You can’t use the quick sizing chart. Most technicians don’t know how to do that.
Bob Boan
You can choose to do what you want, but you cannot choose the consequences.1 -
out of curiosity when you mention a floor mounted number 30 tank are you talking about a floor mounted tank similar to an ex30 or an SX-30V? I only ask because I have seen contractors in my shop ask for a floor mounted number 30, looking for a 4.4 gallon-ish tank and they get the SX-30V which is 14 gallons (similar to EX90) and end up paying more than they should.
I am surprised the local supply house doesn't have 4 on the shelf! even with Amtrol prioritizing shipments to big box stores we still have around 50 or so in each branch here.
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Maybe it was mating season?
3 -
An SX30.
RE Michel branches get a supply truck from their distribution center twice a week, so the bean counters don’t want to leave a lot of things on the shelves of the branches that doesn’t move quickly.
There’s a fair amount of hydronic work around here, but this is definitely not boiler country like the North East.
Bob Boan
You can choose to do what you want, but you cannot choose the consequences.1 -
The only one I remember is that 6" pipe holds about 1.5 gallons /foot.
i was never one for the 'quick pick charts". I always wanted to calculate my own stuff. I don't like figuring pipe and fitting resistance by multiplying x 1.5 for fittings either.
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I cheat, drain down the system and read the before and after on the water meter! Normally have to because there’s typically no isolation valves on those old system.
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you can probably be off by about 30% and still pick the right tank, especially if you don't cut it too close to 30 psig in your calculation. You would have to be closer if your structure is 4+ stories.
1
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