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Joined on September 5, 2006

Last Post on February 28, 2013

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Flow Control

@ February 28, 2013 11:21 PM in Viessmann: DHW pump into Boiler not into the indirect?

What about flow control? Is it possible to inadvertently pull from the space heating loop when pumping toward the indirect. If so then it is possible to introduce high temp boiler flow into the low temp space heating loop. I think Viessman and most boiler manufacturers recommend this piping arrangement for two reasons.
1. Proper placement of check valves and flow direction guarantee adequate flow through boiler HX during both DHW and space heating calls.
2.Above mentioned practices prevent high temp migration into low temp circuits and vice-versa.


@ May 1, 2012 10:29 PM in HBX controls, anyone using them?

I'm in the process of finishing a large install using 4 water to water heat pumps and a back up boiler, all of which heat an 80 gallon buffer tank. HBX will control the whole works. I'm happy with the HBX concept so far- easy to install and plenty of programming options.

2 Stage t-stat

@ November 25, 2011 12:03 AM in 2 Stage t-stat

No, this thermostat would be used in a hydronic application.1st stage heat would be radiant floor and 2nd stage would initiate a higher loop temperature  to bring on fan coils when needed, based on space temperature offset. Variable speed mixing would maintain low temp for radiant during a second stage call. W2 call would land on Lochinvar Knight thermostat 2 contact which would be programmed accordingly. This set up is for a huge welding shop (10,000 Sq ft) where giant doors are opened and closed several times per day.


2 Stage t-stat

@ November 23, 2011 8:46 PM in 2 Stage t-stat

I need a two-stage t-stat that uses set point staging rather than time-based staging in heating mode. Do any fellow Wallies know of such an item?


4" Pex

@ December 14, 2009 9:55 PM in 2" pex for radiant heat

They do make 4" pex. I experienced this stuff on one occasion. It was a day which will live in infamy. We used it to run a set of under ground mains from a main mechanical room to a smaller mechanical room 160 feet away. I'm telling you this stuff is unruly. I still have nightmares about this experience and that was  2 1/2 years ago.

panel radiators

@ July 6, 2009 9:44 PM in Panel Radiator's

I have used Veha panel radiators on several jobs and in my personal home- very happy with the performance and price. This link should take you there.

@ April 12, 2009 1:36 AM in off season towel rack heating

The boiler side of an indirect water heater is not an open system. No domestic water will come in contact with the towel warmer using my plan. The indirect will call for heat at some point during the course of a typical shower. When this happens the boiler will heat the domestic water indirectly and the towel warmer directly. Stick a non-electric thermostatic radiator valve on it so that it can be regulated and your problem is solved. This also eliminates the WWSD problem. mw

towel warmer

@ April 11, 2009 10:28 PM in off season towel rack heating

You could tie your towel warmer into the boiler side of your indirect water heater if you are using one. This way the towel warmer will heat up any time the shower is used, and this happens to be when most of us use towels. I'm going to do this at my residence when I have time.

@ March 28, 2009 10:15 AM in Solo 399 Boilers

The living space is around 19,000 sqare feet. There is also a bunch of snowmelt, 240 gallons of domestic, and a pool heat exchanger.

@ March 27, 2009 9:57 PM in Solo 399 Boilers

We did all of the mains and the majority of the boiler room in Victaulic as an experiment in saving money. We feel that Vic is superior to threaded black pipe given the fact that glycol and threaded connections don't get along.

Triangle Tubes

@ March 27, 2009 11:27 AM in Solo 399 Boilers

No problems with these five 399's heating a "house" in Montana. The job is not yet complete.

mt wallies

@ December 4, 2008 9:47 PM in Montana Wallies

I live in Bozeman and have been in the trade for 11 years.


@ October 29, 2008 10:27 PM in Need some help with the best and the worst (Dan H.)

How is this for old? I actually ran into this thing on a service call.

zcp job

@ October 29, 2008 10:09 PM in Need some help with the best and the worst (Dan H.)

Here are a few before completion pics of a zcp job I did.

@ October 27, 2008 12:21 AM in What the .....

Is this to say that oxy barrier pex can't be used for potable water? The labeling on Rehau barrier pex indicates that it is suitable for potable use.

@ July 31, 2008 9:59 PM in correct radiator piping?

My 4' radiator works fine with this configuration, 6' should not be a problem either.


@ July 31, 2008 9:05 PM in correct radiator piping?

I installed the radiators in my own house using the TBSE method, meaning top and bottom same end. If you choose this method, I would recommend supplying the top of the radiator and returning from the bottom. I tried supplying the bottom and returning from the top at first. About one third of most of the larger radiators did not seem to heat.

@ July 26, 2008 12:14 AM in multimeter

I have been using my Fieldpiece multimeter for 10 years. I would highly recommend purchasing one.

taco pc700

@ July 22, 2008 12:52 AM in Controls

Be aware that the Taco pc700 opens the TT boiler contact to acheive the desired system temperature according to outdoor temperature. This will also cycle the boiler pump off which often results in a rapid decrease in system temperature and boiler short-cycle issues. I have had better luck by opening and closing only the burner circuit when using the Taco system.

@ March 21, 2007 10:53 PM in Hey Dan and the Boys

Hey Joe, You could not have said it better. With respect to your comment about the Soldier's Wife, we should never forget that some of our comrades have it much worse than us. As a heating professional and a soldier, I thank you for recognizing that more important problems persist. Imagine not being home for the birth of your first child- differences of opinions about heating related topics are surely minuscule in relation. Thanks again. SSG MW


@ March 13, 2007 11:07 PM in Outdoor reset vs programmable tstat

Excessive set back can definitely cost bookoo bucks. I have been on several service calls during cold Montana winters which involved one or two zones not working. After determining that zone valves are indeed opening or pumps are indeed running, I check out the programming on the thermostat. Some veteran Montanans actually program set back temps as low as 50 or 55 degrees, even when its 25 below outside, burr. This lack of circulation and heat in the zone piping often leads to frozen and/or broken pipes, and this, my fellow heating professionals, can lead to astronomical repair costs.

ultra install

@ February 25, 2007 11:12 PM in ultra installs

Here is a photo of one of nine Ultras we installed in some condos about eight months ago. Make sure you pipe the system as shown in the boiler manual. We have had no problems with these installs so far this heating season.
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