I found this thread while doing a Google search for an A512 Washer - searching for part# 215447 - and I am thankful I found this thread.

Long story short, my injector was leaking on the hot water cycle only (but only a minor drip on cold cycle). Rubber was shot on 215447, which hot water made worse... thus the worse leaking on hot.

When I found this thread, I thought - what the heck, and eliminated the injector all together. I removed the injector, and simply hooked a 3/4" to 3/4" male coupling, by-passing the injector bracket all together. (I left bracket attached to washer in case I needed it later) It worked like a charm!!!

In regards to the "tank filling slowly" question, I did not experience that problem at all. (In fact it seemed to fill a little faster for me). No problems with hot or cold water... no leaks at all... and what is probably a 20 year old washer, is running like new again.

I'm guessing the injector is some sort of "anti-siphon" device, so "laundry water" can't back into the water supply. But for that to happen, the water would have to run out the top of the machine... HIGHLY UNLIKELY. Probably some government-mandated crap, because of a one-in-a-billion chance of back-siphon. Gotta love bureaucrats!!!