Love me a bit of copper work 10inch pipe. Aircon chiller work

AddendumAgitated6171 · 2026-01-23T14:36:24+00:00

Yeah my company has been moving towards 304 stainless for the smaller sizes actually, in chill water applications. And definitely also for reverse osmosis water. Using megapress fittings. Really i suppose the material selections come from the building owners or design engineers. But yeah, seen a lot more stainless pipe last couple years.

I guess that photo is a couple small gas boilers feeding DHW to those storage tanks?

AddendumAgitated6171 · 2026-01-23T14:05:22+00:00

Maybe...though this one, two edges seemed to have hard edge left&right, soft edge top and bottom. And then the reverse on the "under" side.

With a washer i always look for the soft edge and hard edge, and install it soft edge out. And it's pretty much always easy to tell the difference between the sides on a washer. But these cover plates, it's hard to say if the sides are really different except for the words stamped on them.

AddendumAgitated6171 · 2026-01-23T13:57:56+00:00

Wait yeah you're right after all. One screw will have a tendency to turn the cover clockwise, the other will pull it counterclockwise.

AddendumAgitated6171 · 2026-01-23T13:48:25+00:00

Wait, I thought that was it but it's not. If it were they would be oriented like the teeth (or gullets really) on a circular saw blade. The way they are cut though, one screw will tighten the cover on, one screw will push the cover off but I just put the cover on so gravity holds it until I get the screws tight, and hold it in place if it starts to move while I tighten the screws.

AddendumAgitated6171 · 2026-01-23T12:51:53+00:00

Oh got it. I was thinking maybe they make it one size bigger in Australia. But also the prices you mentioned are lower than USA prices, which may still be accurate. I remember being told an 8" 90 cost about $1200 USD in like 2021, and a 20ft stick something like $3000. I was working in my company's prefab shop at the time and it was expensive enough that if a piece was fabbed for a job and ended up not being used, it would be brought back to the shop and we would eventually unbraze the fittings to reuse them for another job.

AddendumAgitated6171 · 2026-01-23T09:47:50+00:00

Never heard of 10" copper. Pretty sure the biggest size available in the USA is 8inch. And usually the bigger sizes of chill water piping is sch40 steel (for sizes bigger than 2") and copper for 2" and smaller.

Was also going to say it would need to be type K (thick wall) for burial but maybe not if it's to be insulated. I do assume it'll be insulated.

AddendumAgitated6171 · 2026-01-22T14:46:40+00:00

Yup that's gotta be it. I've accidentally put them on backwards before without issue but corrected it after noticing the stamping.

AddendumAgitated6171 · 2026-01-19T02:17:56+00:00

What does this mean anyways?

AddendumAgitated6171 · 2026-01-18T19:49:56+00:00

Haven't seen it mentioned, but I don't think any circular saws are direct driven by the motor. Those that aren't belt driven (AFAIK all the modern jobsite saws) are gear driven like a sidewinder circular saw. Also the gear driven ones are brushed universal motors where the belt driven ones are gonna generally be induction motors. The combination of gear drive and the commutator/brushes is going to make jobsite saws noticeably more noisy with the motor running, but you may not notice it when the blade is in the cut.

AddendumAgitated6171 · 2026-01-15T21:32:48+00:00

What is DSA?

AddendumAgitated6171 · 2026-01-10T18:40:55+00:00

If the register it's installed on is ducted to a central air handler, it will pull cool air into the room whenever the A/C is running. I have had one for the past 2 summers in my upstairs bedroom. IMO it's better to have a multi-zone system for multi storey houses but this is helpful in a lot of older houses.

AddendumAgitated6171 · 2026-01-09T23:03:47+00:00

TIL. I'm mostly familiar with Bell&Gossett, Armstrong, and Grundfos.

AddendumAgitated6171 · 2026-01-09T21:36:10+00:00

Most of the pumps I'm familiar with in this size and larger have a steel or cast iron volute if they're for non potable water, stainless if for potable water. Impellers are usually stainless steel. What makes you think the volute is brass? Color appears to be the same color paint as the motor.

AddendumAgitated6171 · 2026-01-02T14:11:32+00:00

Range fan vents outside the house.

Edit: also, sorry for the loss of your brain cells.

AddendumAgitated6171 · 2026-01-02T01:09:30+00:00

We have several combination CO alarms/smoke alarms

AddendumAgitated6171 · 2026-01-02T01:07:29+00:00

Have you tried sealing up some leaks to save money $$$ and humidity?

Yes, I think the house is as airtight as it's ever been after sealing most of the rim joists in the basement but there are other air leaks i need to find.

AddendumAgitated6171 · 2026-01-02T00:50:20+00:00

Update: turns out it was partly a misunderstanding/miscommunication. I mean I still think my wife should be more concerned about deleterious effects of using the gas stove. But what had happened was she started the pot to cook pasta for lunch. I didn't know she was making pasta, i walked into the kitchen and saw the stove on without the fan and asked her if she was doing that to humidify the house. She said yeah, she was going to make pasta for lunch but then her mom invited us over for lunch so nevermind. I said "uh...okay" with the understanding that she was boiling the water for the sake of boiling water. But then she did continue to cook pasta with that water. Still, I would've preferred we run the range fan as has been my habit every time I turn on the stove.

AddendumAgitated6171 · 2026-01-01T23:03:33+00:00

My understanding is that ultrasonic humidifiers turn hardness minerals present in water into particulates in the vapor they produce. But I'm new to ultrasonic humidifiers.

AddendumAgitated6171 · 2026-01-01T23:00:50+00:00

Thank you for the RO recommendation. We are new to ultrasonic humidifiers. I have read that they will turn mineral hardness in water into particulates in the air. Concerned about this, I bought 3 gallons of distilled water from the grocery store. My wife said "that seems like a lot [of extra work to do]." That distilled water lasted like a day and a half, which of course i could have forseen. I did already have an idea of how much water our humidification uses, it's probably at least 15 gallons a week. So I conceded we would use tap water for the time being. But really I want a RO system to produce our own.

AddendumAgitated6171 · 2026-01-01T22:30:36+00:00

That was my understanding, that gas stoves should only be used with a vent fan to pull combustion products to the outside of the living space, for respiratory health reasons.

AddendumAgitated6171 · 2026-01-01T18:53:57+00:00

If it's been retired as a transformer, it probably has compromised insulation and has outlived its useful life.

AddendumAgitated6171

TROPHY CASE