what is the NPT block petcock drain plug size?

[Rapid Robert]

70's 360. thank you for your time. RR

 

[Illahe]

I should be 1/4 npt.

 

[Rapid Robert]

thank you, I'll get a pair. RR

 

[Bewy]

I thought it was 1/8 NPT?

 

[Darter6]

I thought it was 1/8 NPT?

My thought too.

 

[Rapid Robert]

the hole(s) did look pretty small

 

[Newbomb Turk]

I thought it was 1/8 NPT?

Nope. It’s 1/4 NPT.

 

[Kuz]

That's 1/8-27 NPT on the left and 1/4-18 NPT on the right.

 

[Demonic]

It is definitely 1/4 pipe. I’ve seen them clog, 1/8” NPT would clog for sure.