"DT" wrote in message
...
The HWH is placed on concrete blocks set upright. They
are exactly 18 inches.

MaryL


Concrete blocks are a nominal 16 inches, and to allow for the mortar
joint,
they are actually built 15 5/8 inches in length.

--
Dennis


You made me curious, so I just checked...and you're right. So, my HWH is
sitting on four upright concrete blocks, and I now know it is *almost* 18"
(despite what the plumber told me).

MaryL