I was inspired by a system I saw here:
I didn’t want to buy any more equipment (at least, not for that) so I came up with a system based on what I had and allows me to clean without taking anything apart.
I have Mark’s keg washer which came with an adapter that I plugged in a growler filler and opened the faucet. I happened to have an extra liquid post (off a keg I plan to get working at some point) to make it easily flow back into the bucket. This way it can flow for as long as it needs until it seems to be clear.