/dev/zero equivalent in windows?

I am trying to use the windows version of dd to copy a RHEL iso to a USB stick. However, I wanted to zero out the drive first to ensure there is no filesystem on it before writing it out. Is there an equivalent of /dev/zero in windows that I can use as the infile?

John Newbigin's dd supports this.

Virtual devices are a new feature in version 0.4beta1.

Because windows does not have devices like the unix /dev/zero or /dev/random these have been implemented inside dd. You can use these as input files to supply an infinite amount of zeros or pseudo random data.

There are also some actual device drivers for /dev/zero as well as /dev/random under Win32.