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Joined on June 4, 2011

Last Post on April 24, 2014

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@ March 21, 2014 2:39 PM in Warmboard on slab versus PEX in slab

I agree totally with SWEI, you are already pouring the slab, it would be a waste of money to put warmboard over it. Just make sure that you insulate under the slab (the more insulation means less heat loss). The only reason not to put the tubing in the slab would be if you have a very high water table. If that were the case I wouldn't bother excavating anyway.


Panel Rads

@ March 21, 2014 1:49 PM in Please critique this design

It sounds like you plan on staying in the house for some time and money does not grow on trees. As time goes on you would be wise to slowly change out the baseboard with panel rads and TRV's. If you do it one zone at a time, by the time you are done you can crank the temp down and run the boiler at true design temps. Panel rads operate at much lower temps and do not clog up with dust ( they look better and take up less space as well).


Gas piping

@ March 20, 2014 2:56 PM in Gas piping

Tim, A previous post got me curious so I went to Navian's website to investigate. Here is their claim:

Better Adaptability to Gas Systems
The Negative Pressure Gas Valve and Fan with Dual Venturi operation allows for better adaptability to low gas pressure applications. This industry leading technology makes it possible for the NPE to be installed with 1/2" Gas Lines up to 24'.
Easy residential tank replacements.

Maybe if the unit was mounted a foot away from the meter and had no fittings.
Or am I missing something about their "Negative Pressure Gas Valve and Fan with Dual Venturi" that defies everything that I have ever learned about sizing gas piping.

Please explain.


Slant Fin

@ March 20, 2014 2:32 PM in gas valve on slant fin

Is your boiler connected with black iron pipe or corrugated stainless steel? Gas appliances with CSST or a flex connector will sometimes howl because of the piping. It can be corrected. And as Tim stated, it does need to be set up per the manufacturers instructions. What water temps are you running?


Let me guess

@ March 16, 2014 2:46 PM in Has a sink hole ever tried to swallow up a boiler you service?

Let me guess, the "building engineer" kept cranking up the pressure to "fix" the heating problem and blew out the traps. Then the owner nickle and dimed you on the re-pipe, then took nintey days to pay and only wants to take care of the traps in the apartments where people complain? No?



@ March 16, 2014 12:57 PM in Has a sink hole ever tried to swallow up a boiler you service?

What is the building used for?
Beautiful piping by the way, It's a shame that you did all that work just to see the boiler get swallowed.
Let me guess, he's getting bids from the guy who did the original install.


Red tag

@ March 15, 2014 5:57 PM in Has a sink hole ever tried to swallow up a boiler you service?

As Steve notes, the gas and flue are compromised. I would shut it down until they decided to have it fixed. If you touched it last, you own it.



@ March 14, 2014 11:08 AM in Mono Flow Issues

If you had a contractor out to work on your system he should have been prepared to troubleshoot it. Since he was not, I would find another company! Unless I am giving an estimate on a new system I always have my service truck (and even then I am usually in it). Where are you located? Use the "Find a Contractor" section on the site to find someone in your area.

You really should get that boiler replaced come Summer. Just don't have the guy who showed up without the equipment to do it.



@ March 14, 2014 10:47 AM in General steam trap question

You should post this question in the "Strictly Steam" section, you will get a lot more help there.


No Habla

@ March 11, 2014 2:52 PM in What's wrong with this?

No habla Ingles.

At least he dripped some primer on the 90.


Does the

@ March 9, 2014 6:29 PM in Navien combo

Does the condensate drain onto the floor?  :)

Flow switch

@ March 9, 2014 6:20 PM in Monitron boiler not heating coils

Is the flow switch making?


Will the 15-60

@ March 9, 2014 1:55 PM in Hydrotherm Celtic and a 15-42

I don't know what the pump curves are for the old 15-42 but this seems to be a Celtic replacement (I certainly wouldn't buy it from Europe :)  ?




@ March 8, 2014 3:17 PM in Hydrotherm Celtic and a 15-42

I here ya, but if my tires cost $275.00 each (expansion tank). I would consider getting somthing cheaper :) That site is highway robbery!!

Boiler fill

@ March 8, 2014 3:10 PM in Pumping away ? I must have something messed up! Help

Have you tried shutting off the boiler fill valve? Does the pressure rise with it closed?

Look Here

@ March 8, 2014 2:42 PM in Hydrotherm Celtic and a 15-42

Personaly, I would replace it, but here is a link


Boiler piping

@ March 8, 2014 2:18 PM in Pumping away ? I must have something messed up! Help

On the 175 the primary piping calls for a minimum of 1 1/4 piping, is it? As well with a boiler of that size you must have an awfully large house with ALLOT of baseboard. Is the expansion tank sized correctly? And the manual does call for the pump to be on the supply side, but the fill valve and tank should be on the return or on the secondary side. I'm still trying to grasp why you piped it with two sets of closely spaced tees. Piped that way it will ensure that the second set of tees sees lower water temps.


Reverse indirect?

@ March 1, 2014 5:31 PM in Rinnai RH180 or 100 Gallon Atmospheric?

If the customer has hot water heat and needs a consistent dump load, you should consider a reverse indirect. Properly sized, it will give endless hot water without the pressure drop of a tankless.



@ March 1, 2014 1:50 PM in Beating a dead horse.

If they offered the Megasteam with a gas or oil "kit", wholesalers could stock two boilers for the space of one. I would think that it would make the boiler more attractive to stocking wholesalers, in turn increasing their market share.



@ February 28, 2014 1:58 PM in Gas fire

I think Icesailor is talking about when an existing wood burning fireplace is used and a gas log setup is installed by drilling through the fireplace and running in a gas line. You have to lock the flue open so that it can't be run with the flue closed. Very inefficient, I have not installed one in years.


Bundy (Wiki)

@ February 27, 2014 3:24 PM in radiant in ceiling?

Bundy tube, sometimes called Bundy pipe, is type of double-walled low-carbon [u][color=#0066cc]steel[/color][/u] tube manufactured by rolling a copper-coated steel strip through 720 degrees and resistance [u][color=#0066cc]brazing[/color][/u] the overlapped seam in a process called Bundywelding. It may be zinc- or terne- coated for corrosion protection. It is used in automotive [u][color=#0066cc]hydraulic brake lines[/color][/u] in cars manufactured in the USA since the 1930s.
A 1969 study by the [u][color=#0066cc]SAE[/color][/u] recommended the replacement of Bundy tube with 90-10 copper-nickel alloy [u][color=#0066cc]UNS[/color][/u] C70600 (Kunifer pipe) because of corrosion concerns.[u][size=8][color=#0066cc][1][/color][/size][/u] Kunifer pipe has since been adopted by European automakers [u][color=#0066cc]Volvo[/color][/u], [u][color=#0066cc]Rolls-Royce[/color][/u], [u][color=#0066cc]Lotus Cars[/color][/u], [u][color=#0066cc]Aston-Martin[/color][/u], [u][color=#0066cc]Porsche[/color][/u], and [u][color=#0066cc]Audi[/color][/u].[u][size=8][color=#0066cc][2][/color][/size][/u] Bundy pipe retains the advantage higher rigidity, which means less volume expansion under pressure.
The Bundy Tubing Company, started in the USA, was bought in the 1980s by what is now the British company TI Automotive

Just me?

@ February 27, 2014 2:19 PM in Just me?

Was it just me or was the site down earlier?

Never mind, I just read Dan's post on the "Apologies" thread.

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