Leaking Near Boiler Piping
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I volunteer at our local historical society which is housed in an 1880's mansion in upstate NY. I recently took on all maintenance when my predecessor passed away. My background is electrical but I was left Holohan's book TLAOSH Revisited. The heating system is two pipe steam with a Weil-Mclain EG-75 247k btuh installed about 2017. The near boiler piping looks like the "never do this" picture in the book and it's copper. The two take-offs from the copper header feed a single 4" iron header (hair-pin shaped) which has a 2" tap for one radiator and the 4" main for everything else. On the bottom there is a 2" tap with a pipe plug that my have been a drain long ago. The right hand take-off is leaking. I believe I need to eliminate the stresses of the copper fighting the boiler and the iron header. So my plan is to eliminate one 3" copper riser off the boiler (right-hand) along with the copper header and the right-hand connection to the iron header. I'll make that right-hand iron connection a drain back to the boiler return (there is currently no drain in the iron piping for a long distance).
The tech manual states the min riser size is one 3" or two 2". I called W-M to verify this and they said one 3" is enough. This also lines up with the pipe capacities in Dan's book as well as the steam velocity. Our local society lives on donations only, so I don't have the money to go with a nice complete re-pipe with iron.
What do you think? What an I missing?
Comments
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Once you buy all the coper fittings to do what you suggest i don't think you're going to save anything over doing it properly in black iron if the manual allows one 3" and you do it in 3". the expansion of the copper is likely the cause of the leak. The horizontal section in the equalizer can cause hammer.
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It's not clear from your picture whether there is one main with two inlets (weird) or two mains. Can you shoot a picture upward so we can see how the iron pipe is layed out?
Losing one copper supply is a good idea since, as you mention, the combination is disassembling itself.
Trying to squeeze the best out of a Weil-McLain JB-5 running a 1912 1 pipe system.0 -
I’m President of our local Historical Society, so I understand budget issues.
Just to be clear on what I see in the picture.
None of the steel piping is headers, they are mains. The copper piping is the header, with connections going up to the mains. The issue I see is one main takeoff is between the riser connections which is improper. The order (with 2 risers) should be riser, riser, main, main, drop to return/equalizer.
I think we need more pictures to fully understand what you have going on there. Such as the return piping. The copper drops to the return, there should be a Hartford loop connection there. If not, it might be a counterflow, but more pictures will help determine that.For fun here’s a link to the mansion we maintain, it has a hot water radiator system.
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it is 2 pipe
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Hello danee,
Is the top of the Left hand riser leaking too ? With the re-work idea, does the older iron header have a pitch to it ? If so maybe let that determine which is the steam end and which becomes the equalizer / drain / drip end, however that may require more or just a different re-work strategy.
Looks like they built a bad copper header under a bad iron header. In general did it otherwise work OK ?
National - U.S. Gas Boiler 45+ Years Old
Steam 300 SQ. FT. - EDR 347
One Pipe System0 -
Thanks for the reply's. Let's call the iron piping a main instead of a header as KC suggests. But there is only one. I attached pics for delcrossv from the back and from the right side. As I said, it is a hair-pin shape with both steam connections going to the same volume. From the back you see the 180 bend on the right with the 2" takeoff (not insulated) going to one radiator. On the left is the 4" main (not insulated) going to rest of system. From the right side view you see the 4" main take-off in a 'S' fashion.
I've attached the return view as KC requested. For 109A_5, many of the solder connections may be leaking a small amount. The one I mentioned is more obvious. The pitch on the iron piping is hard to tell. My thought is the steam flow into the 4" main will push condensate toward the right hand end I plan to make a return.
For mattmia2, the only copper I plan to buy is a sweat cap for where we cut the equalizer. All the copper to the right will be removed. The new return line will be black iron.
KC I will definitely visit that mansion next time through PA. Ours is known as the Richardson-Bates House,
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I think the lowest cost would be to feed from the left side ( facing the boiler)and run the right side as a drip to the wet return. I think if you just cap the right side of the old header, you'll have condensate problems.
Trying to squeeze the best out of a Weil-McLain JB-5 running a 1912 1 pipe system.0 -
Those pictures paint a very different picture for me and definitely clarifies what you have.
That looks like it might be asbestos insulation on the pipes, it would be worth having that tested prior to doing any work. I don't see any solution that won't disturb that.
If you are trying to be as budget friendly as possible, this is what I would do. Cut/remove the nipple at the blue line. Install a nipple and reducing elbow (black arrow) and go down to the return piping. That equalizer piping can be copper after the turn down, and smaller per the manual, which will make it easier to work with. You can tie into the existing copper drop from there. Bring the riser up from the boiler on the opposite side and tie into that end of the old header. Remove the existing elbow that's there. For the riser connection it appears you have a little wiggle room to move the boiler a bit and get it lined up, that you would have to decide being there in person. Napkin calculation it should be a few hundred in fittings to do what I show. I'd contact supplyhouse.com directly, tell them you are a non profit (I'm assuming) and see if they can work with you. They are the cheapest for me without discounts, so if they work with you might be even better. They are a good company they have helped out here before, worth a shot in my opinion.
Taking another look, if you can get the elbow off of either end of that header, you could reuse them and save the cost of 2 3" elbows. Not sure how long they have been installed, but I promise they will be stubborn. Like 4' pipe wrench type of stubborn. Most don't try as time is money, but as a volunteer we don't get paid so….
I'd say the biggest expense may be the tools, but see if anyone local will lend them to you, or perhaps lend some labor to the cause, bringing tools along. Like I said I'm very familiar with running these non profits and full feel your pain. Historical Society isn't the only one I'm in, some are school related and we pinch pennies like crazy.
I would do it all in black pipe on the header because that will be WAY cheaper than copper, based on a couple quick searches on supplyhouse.com like half the cost when discussing 3" fittings.
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That 3" copper is probably about 5lb per foot and you can get ~$3.50/lb scrap value.
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Thanks for all the input. This was helpful - some ideas I hadn't thought of. That is asbestos insulation so I'll be tackling that too. I have another issue with the boiler size. I'll put that out next week.
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