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Joined on June 4, 2011

Last Post on April 22, 2014

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Steam / Hot water

@ April 3, 2014 11:53 AM in Value of converting oil/steam to modcon gas?

If no insulation upgrades have been done to the house, you very possibly will not be able to re-use your existing radiators. The radiators in your home were sized for steam heat which operates at a significantly higher temperature than hot water. If you were to switch to hot water you shouldn't be surprised to be cold on cold days. As well, not all steam radiators are capable of being converted to use hot water. Why not vent a new gas steam boiler through the wall?


Oh Harper

@ April 2, 2014 3:59 PM in Burnham gas conversion

Where has harper been? He must be on vacation.

Definition or harper: Talk or write persistently and tediously on a particular topic: guys who are constantly harping on about conversion burners

(I took the liberty of changing the last two words of the dictionary example sentence


Don't forget

@ April 1, 2014 11:49 AM in Navien 240 combi installed - I have concerns

Don't forget the pressure drop through the Navien. The 1/2" main and the pressure drop through the heat exchanger is a recipe for dissatisfaction.


Nice Video

@ March 30, 2014 6:21 PM in Removing and loosening painted radiator condensate trap covers

Nice video, your right though, a little boring but very informative. I didn't know that the repair kits were available. Did Frank do the filming or did WW send down there own videographer? If they provided an easier washer / clip and stainless allen bolts it would definitely make for a better and easier install as you pointed out. Are they paying you guys royalties on the ASU parts?  Good stuff, thanks :)



@ March 30, 2014 3:17 PM in The leak detection job from hell....

Not to take away from ME's praise :) but how did this post get recycled? I remember it from 2012 but when it first popped up recently there was no new post attached to it until Mad Dog's? 

Inquiring minds want to know,


@ March 30, 2014 12:48 PM in Gas piping

I might be misunderstanding you. First you stated that 1/2" pipe would be be adequate for 199,000 BTU's using the "summation method".  Then you stated that I was was correct, you looked at the tables for Navian and realized that no, 1/2 would not cut it but that you misspoke because you use Rinnai. Are the sizing methods different between the two brands? Then you said that you would never install a gas line smaller than the inlet of the appliance. Please show me a Rinnai water heater or boiler with a gas inlet smaller than 3/4". I'm at a loss.


The Downfall

@ March 29, 2014 4:29 PM in smart 50 with tankless water heater

The down fall of that design is that by the time you buy and install all the components (and at a glance, it needs another pump after the mixing valve and another expansion tank on the open loop) you could have bought a combi boiler and have a system that WILL work. As Heatpro said, you are chasing your tail trying to build a cheaper mouse trap. Price out all the materials, factor in your time (don't forget all the time to make it work ).


@ March 28, 2014 3:58 PM in Circulator pressure differential question

That type of installation should be piped primary secondary. Since the water flows through all the boilers all the time in reverse return, If those are zone pumps, any one of them needs to provide minimum system flow through all of the boilers. If that is the case, when all of the pumps are running you will be over pumping and subjecting the system to erosion. It needs a re-pipe. I would also suggest a good controller (if not already installed) as that system is meant to be stepped fired. I have worked on allot of the Hydrotherm MR series boilers, when installed correctly they are a decent boiler.



@ March 27, 2014 3:56 PM in Radiant

The funny thing is, for the price of the stainless alpha's and other wasteful piping, the person could have bought a combi designed for the the job and have a system that works. It is amazing how much people will spend trying to save a dollar. This guy probably had the low bidder (or he did it himself) do the work, and now he will probably pay the low bidder to try and fix it, again and again..... INSANE!!!

I think MMM designed this project  :)


Tub Drain

@ March 27, 2014 1:13 PM in Tub strainer removal

I understand why you pucker when you see an old tub drain Ice. One of the biggest problems is the thin brass threaded tailpiece tubing (tends to just break at the threads and just spin). The newer rapid fit PVC drains are so much stronger. Older is not always better.



@ March 26, 2014 2:45 PM in Gas piping

According to the charts in the Gastite manual that I will try to attach, the only way that you could do 24 feet of 1/2" piping (or equivalent length) might be to find a 6" pressure drop acceptable. In my neck of the woods the inspector would laugh at me if I tried to use that as an example. I'll stick with the .5" pressure drop tables.


Boiler Parts

@ March 26, 2014 1:18 PM in Munchkin replacement

I did a search on google for "Munchkin boiler replacement parts" and came up with a bunch of sites that have them. here is one:


Is there?

@ March 26, 2014 1:04 PM in Old Wirsbo Maifold - retire line and cap

Are snowmelt systems used for roofs? I can see where it could come in handy in some areas where there is heavy snowfall, however I have never heard it discussed here.



@ March 26, 2014 12:51 PM in Want opinions on heating detached garage

If the garage is its own zone, why not use the boiler for the house to heat it? Even if it is a detached garage it may be cheaper to run insulated pex underground than to install its own heat source.


Where to start?

@ March 22, 2014 3:40 PM in Radiant

Run Forest Run, Run as fast as you can and never look back!!! In lieu of that, Sawzall surgery, cut it all out and start from scratch with a proper room by room heat loss. Add a gas cock while your at it. Isolate the domestic from the space heat. It looks like they jackhammered the floor to fit the expansion tank that is in the wrong place. It looks like the pex goes through a hole in the ceiling that was made with a hammer. And install a boiler, use the tankless water heater as a water heater. If this is an Internet lead I would RUN. 



@ March 22, 2014 3:18 PM in Munchkin replacement

I would follow Bob's advice. You will make better use of your credit card on the heat exchanger than you will just buying parts.


Beautiful Work

@ March 22, 2014 2:39 PM in Weil-McLain & Caleffi Installation

Beautiful work! As usual, the mechanical room was an afterthought to the architect. Is there even room to replace the equipment down the road?

What Charlie said

@ March 21, 2014 5:21 PM in Ornate Cast Iron Radiators

Hence the fact that there is no boss in the top to tap a vent, strictly steam.


What SWEI Said

@ March 21, 2014 5:05 PM in Want to move from oil to gas boiler. Best way forward?

What SWEI said is absolutely correct. As well, see the post in this forum titled gas piping.



@ March 21, 2014 4:59 PM in Gas piping

Tim, have you heard back from Navian? It will be interesting to see how (if) they say they do it.
I agree, someones doing fuzzy math. (that's why I said only if the unit was mounted one foot away from the meter). It's interesting what the (no ofense intended) typicaly Japanese manufacturers will claim to sell their product, and how many people beleive them. At several training classes I have been told how if you turn up the tankless temp and mix it down, you will get more hot water, WTF? A BTU is and will always be a BTU. That will work with an indirect or tank type water heater, but not a tankless.


Not to

@ March 21, 2014 3:40 PM in Munchkin replacement

Not to hijack the thread. Bob, who is the ECR distributor in the area?



@ 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.

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