"willshak" wrote in message
I was told it was a condensate trap. If you put it before the valve, how
would you inspect or empty whatever it collected? Mine are after the valve
so I just have to shut off the valve to that appliance to check the trap
and not the whole house valve,


How often do you inspect them? Ever find anything in them?

I've never opened one, even on our big gas boilers that are 5,500,000 Btu.