Water hammer

The good news: We finally got around to hooking up the washing machine.
The bad news: It has a case of water hammer.
Good news: It's a high efficiency washer!
Bad news: High efficiency washing machines take on water in short rapid sips over the agitation cycle. Translation: Bad, bad case of water hammer.
Good news: We are expanding our vocabularies.
Bad news: It's like we're living near the quarry.
Good news: Our clothes are getting clean.
Good news: We can store other things in the quarter drawer.
Bad news: We'll have to call the plumber one. more. time.