It looks pretty easy. The valves are installed:

http://forums.pelicanparts.com/uploa...1335741061.jpg

I will have to buy a pump. a $60 submersible should work well in a pail. Then, just follow the procedure in the manual (Rinnai RC80PHi):

http://forums.pelicanparts.com/uploa...1335741148.jpg

Ian

Man, I love YouTube. I have a Noritz tankless WH and found a step by step how-to video. My local plumber says to descale at least yearly using a "flow aid" solution. The plumber on the video says to use 4 gal of white vinegar. The vinegar may not be as strong as CLR but it's food grade so that's what I'm going to use about 2x yearly.

Same with Rinnai. Just Youtube: rinnai flush & take your pick.

Ian

1/10 hp? What kind of candy assed operation are you trying to do here?

http://forums.pelicanparts.com/uploa...1335748972.jpg

And that's an inline water filter that comes with the Rinnai. You clean it out as part of the process.

Ian