Gauge glass bottom drain size
What size is the thread in the bottom of residential gauge glasses that the cheesy drain screws in to?
Is it 1/8" NPT?
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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Mine is 1/8 if we're voting. I know @Gordo has seen a lot of them because he often pipes a valve on there in the field.
off topic: is it still called "pipe" if it's 1/8 npt?NJ Steam Homeowner.
Free NJ and remote steam advice: https://heatinghelp.com/find-a-contractor/detail/new-jersey-steam-help/
See my sight glass boiler videos: https://bit.ly/3sZW1el0 -
@ChrisJ
Yeah, I was going to say 1/8" yesterday, but after some chimed in wit 1/4" I decided to keep my trap shut.
Guess it depends on the brand1 -
1/4" pipe thread is typically another way to say 1/4" npt assuming you're in North America.ethicalpaul said:Mine is 1/8 if we're voting. I know @Gordo has seen a lot of them because he often pipes a valve on there in the field.
off topic: is it still called "pipe" if it's 1/8 npt?
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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They're almost all 1/4" pipe thread. Some of the older ones are 1/8". The weird ones with black-handled ball valves (that always leak) don't use pipe thread.All Steamed Up, Inc.
Towson, MD, USA
Steam, Vapor & Hot-Water Heating Specialists
Oil & Gas Burner Service
Consulting0 -
Yes, but I feel funny saying "well, time for me to fit some 1/8" pipe!"ChrisJ said:
1/4" pipe thread is typically another way to say 1/4" npt assuming you're in North America.ethicalpaul said:Mine is 1/8 if we're voting. I know @Gordo has seen a lot of them because he often pipes a valve on there in the field.
off topic: is it still called "pipe" if it's 1/8 npt?NJ Steam Homeowner.
Free NJ and remote steam advice: https://heatinghelp.com/find-a-contractor/detail/new-jersey-steam-help/
See my sight glass boiler videos: https://bit.ly/3sZW1el0 -
Well, just kick the numbers & go fit up some 8/1" pipe; if any one asks say 'Oops, sorry'.ethicalpaul said:Yes, but I feel funny saying "well, time for me to fit some 1/8" pipe!"
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@ethicalpaul
1/8" pipe thread is quite common. Gas valve pressure tappings, some pressure gauges (most are 1/4") plenty of other stuff.
That being said, I don't think many have ever gone to the supply house and bought much 1/8" pipe.
In fact if anyone ever had to run 1/8, 1/4 or 3/8 pipe you might just as well run 1/2".
If I am not mistaken all those three smaller sizes cost a lot more than 1/2" simply because so little of it is sold
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Thanks, I know itās a thing, but it just seems too small to call āpipeā
NJ Steam Homeowner.
Free NJ and remote steam advice: https://heatinghelp.com/find-a-contractor/detail/new-jersey-steam-help/
See my sight glass boiler videos: https://bit.ly/3sZW1el0 -
well the average pigtail i use on a residential boiler is 1/4" NPT. now i havent looked at a set of petcocks in a while but i have a hard time believing they're the same size.
i say 1/8" NPT
edit...
or not, i learned theres a whole lot more to gauge glass than i suspected
https://www.mmcontrol.com/apollovalves/pdfs/cat_PHBRWGA.pdf0 -
> @ch4man said:
> well the average pigtail i use on a residential boiler is 1/4" NPT. now i havent looked at a set of petcocks in a while but i have a hard time believing they're the same size.
> i say 1/8" NPT
What does the pigtail size have to do with the drain on a gauge glass drain?Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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Did anyone think to look at one? There may not be a single size. Mine looks to be1/8"NPT. It certainly isn't 1/4" but they may vary from supplier/type to supplier/type.0
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> @Fred said:
> Did anyone think to look at one? There may not be a single size. Mine looks to be1/8"NPT. It certainly isn't 1/4" but they may vary from supplier/type to supplier/type.
Steamhead said they're mostly 1/4 and some older ones are 1/8.
I believe him.Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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> @Fred said:
> Did anyone think to look at one? There may not be a single size. Mine looks to be1/8"NPT. It certainly isn't 1/4" but they may vary from supplier/type to supplier/type.
I plumbed mine with an elbow and a valve like I learned from @Gordo so Iām quite confident in the size of mine šNJ Steam Homeowner.
Free NJ and remote steam advice: https://heatinghelp.com/find-a-contractor/detail/new-jersey-steam-help/
See my sight glass boiler videos: https://bit.ly/3sZW1el0 -
I did too, but I did it a few years ago and I can't remember.ethicalpaul said:
Actually here's my old drain screwed into a 1/4" tee.
Single pipe 392sqft system with an EG-40 rated for 325sqft and it's silent and balanced at all times.
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size comparison, obviouslyChrisJ said:> @ch4man said:
> well the average pigtail i use on a residential boiler is 1/4" NPT. now i havent looked at a set of petcocks in a while but i have a hard time believing they're the same size.
> i say 1/8" NPT
What does the pigtail size have to do with the drain on a gauge glass drain?0 -
oh look, the same size as a pigtailChrisJ said:
I did too, but I did it a few years ago and I can't remember.ethicalpaul said:
Actually here's my old drain screwed into a 1/4" tee.0 -
I'd start @ 2:35 in this video...
https://www.youtube.com/watch?v=_z8v1YOQcM4All Steamed Up, Inc.
"Reducing our country's energy consumption, one system at a time"
Steam, Vapor & Hot-Water Heating Specialists
Oil & Gas Burner Service
Baltimore, MD (USA) and consulting anywhere.
https://heatinghelp.com/find-a-contractor/detail/all-steamed-up-inc0 -
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Could you please list the components he used. I tried looking them up on Supply House but was not having that much luck. I would like to do this to mine as well.Gordo said:I'd start @ 2:35 in this video...
https://www.youtube.com/watch?v=_z8v1YOQcM40 -
Here's a 1/4" street 45: https://www.supplyhouse.com/Bluefin-BRS45E025-1-4-Brass-45-Street-Elbow-Lead-Free?utm_source=HeatingHelp.com
He is using the square kind but SupplyHouse doesn't seem to have those.
Then I think he is using something like this for the valve/hose attachment: https://www.supplyhouse.com/Dahl-521-61-04-1-4-MIP-x-Male-Hose-Straight-Hose-and-Boiler-Drain-Valve-Lead-Free-Brass?utm_source=HeatingHelp.com
But I just used a ball valve like this so I could see the color of the water coming out (I hold a container under it): https://www.supplyhouse.com/Bluefin-BVT025-1-4-Full-Port-Threaded-Ball-Valve-Lead-Free?utm_source=HeatingHelp.com
(I put a HH source parameter on these URLs in the hope that it gives credit for your clicks to HH, is that reasonable, @Erin Holohan Haskell ?)NJ Steam Homeowner.
Free NJ and remote steam advice: https://heatinghelp.com/find-a-contractor/detail/new-jersey-steam-help/
See my sight glass boiler videos: https://bit.ly/3sZW1el1 -
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Thank youethicalpaul said:Here's a 1/4" street 45: https://www.supplyhouse.com/Bluefin-BRS45E025-1-4-Brass-45-Street-Elbow-Lead-Free?utm_source=HeatingHelp.com
He is using the square kind but SupplyHouse doesn't seem to have those.
Then I think he is using something like this for the valve/hose attachment: https://www.supplyhouse.com/Dahl-521-61-04-1-4-MIP-x-Male-Hose-Straight-Hose-and-Boiler-Drain-Valve-Lead-Free-Brass?utm_source=HeatingHelp.com
But I just used a ball valve like this so I could see the color of the water coming out (I hold a container under it): https://www.supplyhouse.com/Bluefin-BVT025-1-4-Full-Port-Threaded-Ball-Valve-Lead-Free?utm_source=HeatingHelp.com
(I put a HH source parameter on these URLs in the hope that it gives credit for your clicks to HH, is that reasonable, @Erin Holohan Haskell ?)1
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