Apologies if this is a dumb question, but I have zero experience with tenders!

My question is this:

I am a trustee of a sectional title body corporate.
We have been planning an installation of water meters in an apartment block for some time.
Everything is ready,we just need some quotes.
How does one go about issuing a tender,that will reach a wide audience of quality installers,with the necessary expertise,and competitive pricing?
The installation is tricky,so we would like as much consultation and pre-tender meetings as possible.

Any advice to a total tender noobie would be much appreciated!