Appreciate both energyexpert’s and eleent’s advice. I took the WH out today and tried to fabricate a “pan” for the closet using sheet metal with a 3″ lip up the wall. Unfortunately the largest width I could fing of a roll of sheet metal was 24″ so I had to put it together with two pieces. I did use the flashing cement to seal the seam so we’ll see if that helps. I still need to raise the WH out of the pan and bricks may work since we are not in earthquake country although the treated 4×4’s with the smitty pan sounds good. Thanks to both of you.