Base Board Venting Tees with Cap....not 1/8" FPT....Availability of New Caps??

JUGHNE

BB's have the bleed caps with flat screwdriver slot.
The caps are screwed on the male threads that are cast into the vent tee.

They are just like caps on the stop & waste valves.

Any best guess as to what that thread is?

Would like to change all of them. Some plugged and some stuck.


Very difficult system to work on.....boiler drain plugged.....no floor drain....no isolation valves. For 2 elderly women. Installed in late 70's or so.

Thanks for the help.

ChrisJ

The common ones I know of are NPT, BSPT, BSPP.

BSPP will have an O ring or gasket.

BSPT is tapered.

JUGHNE

These bb vent tees were probably fairly common in the 70-80's.

The cap has a bleed hole in the side with small rubber flat washer inside the top of the cap to seal.

I did get the leaker to seal by putting some Teflon up into the cap.

I should have tried an 1/8" coupling on it while drained down.... .

The screw slots on many of them are worn out.

EBEBRATT-Ed

Yeah, I have lost the caps from stop & waste valves when I shut down and drain my outside faucets.

From what I have found there are at least two different sizes, don't know the thread size

JUGHNE

Thanks Ed, where did you get the replacements other than rob them from another valve?

These seem more robust than usual and have the screwdriver slot on the head.

pecmsg

Order these
https://www.amazon.com/LASCO-06-9057-Bleeder-Caps-Brass/dp/B01N0EFEMY/ref=sr_1_13?crid=15MSDUODCWDL8&keywords=bleeder+valve+caps&qid=1636410615&sprefix=bleader+valve+caps,aps,259&sr=8-13
If they dont work you can used the gaskets

JUGHNE

Thanks, pecmsg.
I might try something for gasket material in the caps.

Without the screwdriver slot they would be a real PIA for this situation.

EBEBRATT-Ed

stole them of old valves. never seen ones with screwdriver slots

JUGHNE

Another reason to save old "stuff".

Zman

I have found packs of 3 common ones at Ace hardware. I never paid much attention to the threading, One of them always fit.

mattmia2

There's your fitting:
https://www.supplyhouse.com/Everflow-CCDL0340-NL-3-4-C-x-C-Cast-Brass-90-Degree-Elbow-w-Drain-Lead-Free

You could always solder a brass nut or short screw on it to turn it with a screwdriver or nut driver.