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Old 01-14-2009, 07:43 PM   #16
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converting propane boiler to natural gas


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of the two i am trying to decide betweem, one was replaced because they invested in a new high efficiency boiler, the other because they switched over to furnace heat. before i buy it, i want to attach a fitting so i can compress air into it to see if it leaks. is this a viable test?
That will tell you if it holds water not anything about the controls or safetys.
Kinda like a car engine. The block may not be cracked but what kind of conditions was it subjected to. It may work out great for you just saying buyer beware. You have no one to hold liable if a problem arises. I personally dont belive in taking the risk with used equipment.

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Old 01-14-2009, 07:43 PM   #17
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converting propane boiler to natural gas


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Originally Posted by drewhart View Post
of the two i am trying to decide betweem, one was replaced because they invested in a new high efficiency boiler, the other because they switched over to furnace heat. before i buy it, i want to attach a fitting so i can compress air into it to see if it leaks. is this a viable test?
Yes, and no.

The proper air pressure test, is not safe to do.

Keep it under the relief valve pressure setting.

Some boilers, after they have been used for a while, and then set dry, you can blow the seal out, when you pressurize them.
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Old 01-14-2009, 08:07 PM   #18
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converting propane boiler to natural gas


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I am not an HVAC tech nor do I play one on TV! But wouldn't the type of house,insulation ,windows and geographic area come into play?

Gary
With 1900 sq ft He could keep the doors open and that boiler would still maintain temp it's so big.
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Old 01-14-2009, 08:18 PM   #19
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converting propane boiler to natural gas


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With 1900 sq ft He could keep the doors open and that boiler would still maintain temp it's so big.
Yah Leave the door open it is a built in snow melt system for the front porch.
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Old 01-14-2009, 08:30 PM   #20
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converting propane boiler to natural gas


First do not do this yourself Installing a boiler is not connect the pipes and pray for no leaks.

As to the size. Over sized boilers are not the same as over sized furnaces. The biggest issue is will the flue and combustion air be sufficient?

As to testing for cracks no real way on an old boiler you need heat and pressure and water going through the tubes.

If the boiler has set for a long time 3 or more years Rust will be an issue.

The conversion is simple change the spuds the regulator spring possibly the burners. Then set the gas pressure. Getting the kit would be a trick. Lets say they still make the kit or someone has one how will you buy it. No responsible supply house will sell it to you. I hope.

I have done this for 30 years I would walk you through most any job but this is past DIY you might get a tech who would be willing to let you work with him and save a few Benjamins
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Old 01-14-2009, 09:34 PM   #21
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converting propane boiler to natural gas


i have a friend who has a pipe fitter friend that helped him put in a new boiler. if i get a boiler that is too big, asside from the flue issue, would it work? can it burned turned down so i dont have to keep the doors open? i would love to buy a brand new boiler and have it proffesionally installed, but as you know, the budget is limited. i just want something to creat somekind of heat safely. i can get this boiler for about $200. i heard i will need a new valve because propane is under more pressure than natural gas, so the valve opening is smaller. how do i know if i need a new burner? and where is the spring assembly?
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Old 01-14-2009, 09:35 PM   #22
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converting propane boiler to natural gas


http://cleveland.craigslist.org/for/976534135.html here is a link to the boiler that i want.
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Old 01-14-2009, 09:45 PM   #23
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converting propane boiler to natural gas


http://columbus.craigslist.org/for/963085052.html

this is the other one i am thinking about. the guy said him and his wife were out of town and the electricity went out. somehow the power to the boiler was cut off. when they came home, some of the baseboard heaters pipes burst, his wife said "i hate radiant heat, put in a furnace!" so thats why he is getting rid of this one. do you think the cold frooze anything in the boiler? im guessing it was in the basement which should be the warmest area.
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Old 01-14-2009, 09:51 PM   #24
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converting propane boiler to natural gas


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http://columbus.craigslist.org/for/963085052.html

this is the other one i am thinking about. the guy said him and his wife were out of town and the electricity went out. somehow the power to the boiler was cut off. when they came home, some of the baseboard heaters pipes burst, his wife said "i hate radiant heat, put in a furnace!" so thats why he is getting rid of this one. do you think the cold frooze anything in the boiler? im guessing it was in the basement which should be the warmest area.
Freez up This boiler is a risk right off the bat could have been frozen.
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Old 01-14-2009, 09:54 PM   #25
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converting propane boiler to natural gas


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http://cleveland.craigslist.org/for/976534135.html here is a link to the boiler that i want.
The burners look very rusty on this one make sure it was not in a flood.
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Old 01-15-2009, 05:23 AM   #26
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converting propane boiler to natural gas


That Valiant, is rusting out. Look at it.

The WM is an old reliable 60 year old design(design, not that unit). Gas hog.

Actually, they both gas hogs.

Flip a quarter to see which one you want.

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