Best Of
Re: Dunham valve rebuild?
Bingo. Was required for recertification of the boiler room after having sat unused for so long.
Re: I'm curious what people are paying for natural gas in the summer and overall.....
A therm is 100,000 btu no matter what fuel you use……just like BTUs.
Its just a form of measurement.
Natural gas is usually around 1000 btu/cubic foot so 100 cubic feet is about a therm
Re: Air Vent at boiler. Necessary with Air Sep?
Just curious,
but have you tried simply turning up the high limit temperature of the boiler for a few hours to force the air bubbles to a new larger automatic air vent? that is the easy way to remove trapped air slugs.
You can simply install the new air vent with a reducing bell, pipe nipple, ball valve, pipe nipple and coupler the size of the automatic air vent.
The use of a ball valve lets you change the air vent by simply shutting the valve off when it starts leaking.
The one inch male thread air vent in the attachment is just one model size offered by Mcmaster-Carr.
leonz
My steam library
Figured I would share my steam library. Just a homeowner here. I would like to try to find a print copy of a 1943 Webster catalog if possible and are there any other recommended books I try to get?
Re: Bradford White temp
Holy cow…
I think you hit the nail on the head Matt.
I'm almost positive both mine and my dad's are set to turn off at roughly 120F.
I thought it was on at 110, off at 120. That's measured at the short length of copper pipe right at the heater.
ChrisJ
Re: Antifreeze
ethylene glycol is more thermally conductive than PG
Dowfrost is a PG, Dowtherm is EG both are used in hydronics. EG is a bit more toxic.
EG is used when there is no potential for contact with potable water. Skating rinks, large chilled water systems for example
Automotive glycols containe silicates which can sludge a hydronic system. Do not use automotive PG or EG in hydronics
Do not use RV antifreeze, no inhibitors
Always label the system indicating the type of fluid and the date.
hot_rod
Re: Fixing the gurgling at the end of my Steam Mains
soldered on the copper and tested it out. No leaks and no gurgling sound!!!
Re: Bell & Gossett Circulator
Sounds like it could be low on water? What is the boiler pressure? 10- 12 psi is common.
That is a water lubricated circulator, so it needs to be filled and air free.
You can dead-head those circs for a short period, eventually they can boil the water out of the volute then you are running dry.
A leaking relief valve is often traced to a failed or water logged expansion tank, or a fill valve that is leaking past.
hot_rod
Re: Adding antifreeze to old boiler
The Rhogard is only 30% as-is and the Sentinel doesn't seem to show anywhere what its concentration is, but by the burst temp I would guess around 40%. The only way to do this properly is to get your hands on a refractometer and make adjustments as necessary, but you almost certainly don't have enough to keep the total concentration above 25% where it needs to be. With that said, why do you want glycol at all? If this space is occupied, it's not going to freeze and there is no reason to mess with glycol.
GroundUp
Re: Vapor Steam Heating System?
Maybe, maybe not. @JbPhillips , in the third pic where the device comes out of the housing and a pipe goes up, where does that pipe end up?
Also, where are you located? We might know someone who can help you……………
