Straight 1/4" steam vent to 1/8" angled

ImYoungxD

I have an old fin tube radiator that uses 1/4" straight air vents that needs a new air vent.
I have a lot of 1/8" angled air vents. Any way to reduce 1/4" to 1/8" ?
I can't find anything on Home Depot

TIA

ethicalpaul

Supplyhouse, a sponsor of this fine site, has a full selection of 1/4" straight vents. Never buy a radiator vent from HD

https://www.supplyhouse.com/Jacobus-Maid-O-Mist-J4S4-4-1-4-Straight-Air-Valve-7862000-p?utm_source=HeatingHelp.com

They also have Gorton if you have extra money

They also have 1/4 to 1/8 reducers, but I wonder how helpful that would be to you--I think the angled vs straight issue is your bigger problem. So just get the 1/4 straight vents

ImYoungxD

I was trying to prevent buying maid o mist since mine cracked and started spitting water. I wanted to convert it so I can use my 1/8" gordon angled vents

They got elbow reducers so I'll probably go that route.

Thanks

ethicalpaul

OK. So it cracked after how many decades

ImYoungxD

Noticed it after 2 years of owning it. PSI never goes over 2

ethicalpaul

Sorry to be precise, but I'm collecting data to possibly modify my opinion.

You owned it (the vent) for two years, after it served the house for unknown decades, or you bought the vent two years ago?

PS: the crack wasn't from PSI, it was from heat/cool cycling IMO

ImYoungxD

I guess it was from the vacuum once the boiler shuts off.
Any way to prevent vacuum? I have two fin rads which are two pipes and the rest of the system is one pipe for CI rads.

ethicalpaul

Others with more experience in dealing with 2-pipe vs 1-pipe vacuum will reply (I'm a one-piper), but you can relieve the vacuum with a main vent that opens quickly on cooling, or there are vacuum breaking devices.

I was interested in this issue when it seemed like all my vacuum was getting relieved through my bedroom vent, causing much whistling, but something changed in my system (probably main venting) so that no longer happens.

So it was an old vent then?

I still say it was the temperature cycling

ImYoungxD

The vent is 2 years old. Main vent is big mouth

ethicalpaul

Thanks so much. Do you remember where you bought it? If this is too many questions, just ignore me, and thanks again

ImYoungxD

supplyhouse.com