Heater hose fitting thread size?

[rd]

Can anyone tell me what thread size the heater hose outlet fitting on the intake manifold is?

It's typically the 90 deg fitting on the right front of a carbed intake.

I need to find a new one, and I forgot what thread size. Should be pipe thread.

Thanks.

 

[robertdale]

I'm pretty sure it's 3/4 inch NPT. the same as a fuel injection intake.