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Joined on November 12, 2012

Last Post on August 21, 2014

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Here you go

@ August 21, 2014 3:18 PM in System's Architect

It was hiding in the special projects section


@ June 25, 2014 3:24 PM in Initial target Flow Rate calculations

I believe the rads are connected across the top and bottom, if I'm remembering the thread correctly. I don't believe it was a steam conversion

right/left nipples

@ June 17, 2014 7:51 AM in CI Rad, intlet & outlet setup - Bushings, nipples, elbows and TRV’s

McMaster Carr has right/left nipples, I had buy a bunch when I picked up some old Corto rads from a house that had been built in 1917. Smallest length I could find was 4 inches. And nothing with 1 1/4 inch diameter, I'd have to make my own.I never found any bushings. All the rads in my house have the double connection on one end, just like the ones pictured.
Harvey, none of the ones I've had apart appear to have any diptube in it. You can touch your fingers together inside(I was curious too) The thing that all of the rads in my own house have in common, is that they all came from old gravity fed systems. Could that be the reason they don't have separation between the intake/output ports?

3rd pic

@ June 7, 2014 1:06 PM in Radiation Identification

Hard to tell from this angle but it sure looks like this,


@ May 6, 2014 5:58 PM in Hot Tub Noise

KC's suggestion is truly the only way to reduce/eliminate the noise. Like others have mentioned, it's going to be an exercise in chasing your tail unless you decouple the tub from the structure. I've found chasing down noises highly subjective, my ears don't always hear what someone else hears.
Is it possible for them to turn the deck to a freestanding one?

Very comparable

@ April 20, 2014 5:03 PM in CPVC in hydronic heating system

 1000 L is 1 cubic meter and weighs 1000kg. 1 cubic centimetre is equal to 1 millilitre which also weighs 1 gram. Conversions and comparisons should be easier to do now.

brick work

@ April 7, 2014 6:50 PM in Mysterious infrared image caused by steam heating system

Icesailor is referring to the building envelope. If you insulate on the back side of the convector, the heat loss to the outside will be reduced, keeping more of it inside the living space.
His other observation is describing the construction of your brick walls. If you look closely at your pics, you'll notice that every 5th row consists of a half sized brick. In normal residential construction, that wall would be one brick wide and not likely weight bearing, so its called a veneer. He rightly points out that to do that brick pattern(running bond) in a veneer would require you to cut bricks in half to make the short brick row. Not a cheap or fast way to do it. To do the pattern quickly, the bricks are most likely placed length wise across a base of two bricks, making your wall 8 inches thick. If they did the construction that way, he rightly points out that they didn't likely cut bricks to make a path for the vertical steam lines going to the different levels, so to properly insulate your steam risers, you should be looking in an area like a closet to find the soffits for them.


@ April 5, 2014 11:06 PM in Auto fill/back flow preventer. Is it necessary?

Manufacturers aren't responsible for the install, they make the equipment that has the ability to satisfy the code and the installer takes it from there. Most instructions mention that the unit should be installed to applicable codes. They won't take the blame if you don't turn up the temp of the tank to mitigate the risk.


@ February 25, 2014 9:11 AM in any risk associated with a properly executed TSP cleaning?

I like your research into this, been very interesting. The precipitates forming in your saucepan after the NaOH was added are most likely the chlorides that form from raising or lowering your solutions pH. And you and the Navy are correct in not wanting to use too high pH solution(or lower for that matter) and using water to adjust because it takes a factor of 10 for each level you wish to raise or lower the solution i.e; 1 litre of pH 4 solution to pH 6 requires approx 100 L of water, to hit 7 requires 1000 L. It's one of the reasons that we don't use water to adjust pH if there is a spill at our facility. Massive increase in size of the clean up


@ February 19, 2014 9:05 AM in How serious an issue is water quality?

I would think it would be a competitor to their filtration products but I would imagine it would add another layer of protection when used with inhibitors and the like. We use a similar system by dominck-hunter at my full time job to filter parts of our process flows during vessel transfers. I've often wondered if it could be used in a hydronic system, especially ones that contain iron, and this appears to answer "yes" to that question. Nice design, the filter mediums look easy to swap out when the time comes.
I do have a question about the medium that removes all the dissolved minerals from the water. Would that not be a bad thing, kind of like adding deionized or RO water to the system.? Wouldn't the water remove theminerals from the metal in your system to try and re-establish a balance? We have problems measuring pH of our pure water because of the lack of minerals.

On the positive side

@ February 18, 2014 6:47 AM in how prevalent is this?

A trip through the comment section brings up just about every myth/misinformation related
to radiant heat that I've ever heard, so it lets me know what I'm up against(Using 7/8 inch pipe under floor for better heat transfer was a good one, among others) I think it just reinforces the fact that the industry needs a better informed consumer as to why it costs what it does for this type of system. They don't know what they don't know." It's just water pumped through pipes, right? Anyone can do that" The comments weren't much of a surprise, I've heard variations of them in my short time learning this trade and those people tend not to be your client base. (Lowest price=best system)


@ February 12, 2014 11:19 PM in Heat gain in computer server room

Could they use the waste heat to help with DHW? Sounds like this would be a good application to use it.

good info

@ February 1, 2014 12:14 PM in Battery CO?

I work with methylene chloride on a regular basis at my place of business, and the vapours are heavier than air so they will accumulate in low areas with a potential for flashback.
I honestly hadn't given any thought to it being contained in cleaning compounds. I will have to look at the MSDS for the cleaning solvents when I'm back at work.

As far as breaking down in the body, we had an incident many years ago involving 2 gentlemen while they were loading an acetonitrile damp product. The air exchange for the room they were in was off, so while they were in there, their respirator cartridges were becoming saturated very quickly. 5 min life of fresh cartridges(unheard of!), 45 min exposure. Problems didn't arise until roughly 8 hrs later while they were at home. It was found that after ingesting the vapours, as it breaks down in the body, it turns to cyanide. The 2 gentlemen spent 2 days in the hospital in an oxygen tent, and were very lucky to survive, given how much chemical they had been exposed to.

I'm going to guess

@ January 4, 2014 10:13 AM in swing joints

That his answer will be, yes


@ December 4, 2013 5:07 PM in Thoughts on dense packing plaster walls?

can be a lot of heat loss, especially at the rim joists(old houses tend to leak where they meet the foundation)
Old layers of paint are NOT vapour barriers, they are vapour retarders. It is an important distinction to make.

Should be

@ December 3, 2013 9:07 AM in Thoughts on dense packing plaster walls?

fine without a vapour barrier. Cellulose insulation isn't like fibreglass, it won't lose its insulating ability with some moisture in it. As long as the wall can dry in at least one direction, it will be ok.(We're talking vapour, not bulk water. Leaks are very bad and must be fixed) You can find just about all the info you'll need in the article below and its assorted links.

I suppose

@ November 15, 2013 5:14 PM in Good Advice?

The btu per sq. ft rules of thumb will be helpful for people who live in tents


@ November 12, 2013 6:24 PM in Quality of help on the Wall

That is the perfect attitude to have. If you educate the consumer, they will be able to make more informed decisions and, in my opinion, it will be much easier to sell your installs because they'll know exactly why yours may cost more than the cheapest guy. Education helps everyone, in every line of work

Hate to be the bearer of bad news

@ November 2, 2013 10:23 PM in code man says my DHW tank has to go as a heat source What now?

But according to their shipping policy, pexsupply doesn't ship outside of the U.S. I'm pretty sure that includes us up here in the Great White North.

He would like

@ October 31, 2013 10:10 AM in Knight boiler problems

additional pictures of the exhaust/intake lines that terminate through the glass block wall. Those need to be done according to the manufacturers approved installation instructions.

Been awhile

@ October 19, 2013 6:29 PM in AquaPex in closed loop

but I thought I'd give a quick update. I replaced all the aquapex with hepex(wasn't as big a job as the last installer made it out to be, 1 person, 10hr day) and everyone that said it was the wrong tubing to begin with was absolutely correct. In roughly one year there was a significant coating of rust, sticking to EVERY square inch of the aquapex(with inhibitor). I could see it through the tubing with a flashlight. The hepex, so far, has absolutely nothing sticking to its walls(I don't expect that to change)

Thank you for the excellent advice(those that were worried about the boiler dying a quick death were justified, there was a lot of crap flushed out of the heat exchanger) and hopefully I get another 10 yrs out of the boiler so I can finish the reno work here before it needs replacing


@ October 19, 2013 5:52 PM in code man says my DHW tank has to go as a heat source What now?

He may not be able to get that pump. I live fairly close to Toronto, so if its going to be available, it would be here first but every supply place I went to, after they stopped looking at me like I had 3 eyes,(not many of them had even heard of it 6 months ago) said it wasn't being shipped in the foreseeable future to Canada. (it may be available now but I haven't had time to look into it lately)
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