I don't use bags of any kind in the boil kettle, and my kettle doesn't have a valve or false bottom, or a trub dam; it's just a kettle. I see no need for them. After the boil, I chill, whirlpool, and rack. Break material and spent hops settle out quite nicely. Rack from the side, of course.
Sent from my SAMSUNG-SM-G900A using Tapatalk