[Greenbuilding] greywater vessels

[Reuben Deumling]

My little greywater system is taking shape, thanks to a newly evident
crack in the 110 yr old cast iron drain pipe. I'm hoping to rout the
water from two sinks and a shower via 30 gallons of intermediate
storage into my garden. The barrels are so that we can continue using
a watering can or hose to distribute the water more precisely.

I have two 15-gallon blue plastic barrels with two bungholes each on
top. The diameter of the threaded plugs is roughly 2-1/2", with
knockout centers that can receive 3/4" pipe thread. So far so good.
However I'd like to plumb my 1-1/2" or 2" ABS pipe into several of
these. Any idea where I might find replacement plugs that would
facilitate this, or have ideas how else to accomplish this task?

Alternately I'm considering rigging up a SIMPLE filter fabric strainer
deal before the greywater enters the barrels, in which case I could
imagine 3/4" pipe may be suitable for connecting the two barrels. I
suspect others have tried this and may have insights into what works
well.
Art Ludwig's '06 edition of his book on the subject, though very
detailed, doesn't speak either to filtering or storage. Thanks for any
insights.

Reuben Deumling