Phil's Sparger (I could use a new one - but they aren't made anymore).
The reason being that Dan Listermann said it was the most worthless piece of equipment he ever produced.
Why did he say this? I have used mine for 15 years, and it works just fine. I use a five gallon cylindrical cooler (blue) for a mash tun due to space constraints, so another (in addition to the two I use for well, coolers) big rectangular cooler and batch sparging don't work for me.
It broke easily. It seldom spun like it was supposed to, although the spinning made no difference anyway. It lost heat as it spun (if it did) and from the distance the water had to fall from it. And mainly that there were far easier and more effective ways to accomplish fly sparging.
Why couldn't you batch sparge with the equipment you already have?
Huh. Mine did not break (15 years) spins as well as the first time, too. Heat loss I hadn't considered and with 10-14 lbs.of grain in a five gallon cooler the falling distance is two to five inches. Funny, it is what I first had and never had any issues that made me want to do it differently--I guess I'll have to think that over.
As for your last question, I would never let my beer anywhere near my camping coolers! Let's just say the sanitization standards are a bit different!
Thanks for the reply, Denny. Cheers.