You could put a valve on your BK and then use some kind of screen to filter out the hops post boil. Then you can just throw the hops in loose during the boil. I use a sanitized paint strainer and pour my chilled Wort through it into the fermenter, then pull the paint strainer out and let it drain.
Don't do PVC, guaranteed to melt.
Bottled: Blackberry Mead
On Deck: Pilsener, Brown, Barleywine, Coffee Porter