Opening- any ideas what this is for?

[MAROBSON137]

We labeled everything, except this one thing and we cant figure out what it is for. Any ideas? It's not the pressure release for the carvin cartridge, we have that in.

 

[mknauss]

What equipment do you have? Looks like a drain plug for a heater or pump.

 

[MAROBSON137]

What equipment do you have? Looks like a drain plug for a heater or pump.

That was it! It was the drain plug for the heater. Thank you!