We are working on a project where the site engineer is asking if tapping into the underground fire line is acceptable to supply a water cooling line to a water source heat pump unit with a 3-inch line.
I'm having trouble finding where it is not acceptable and thought I'd reach out to the knowledgeable members here.
This site has a combination potable/fire line as shown in the picture below.
Should we require them to tie into the 8-inch tap from the potable water line upstream of the fire protection vault (blue line in the drawing)?
Or is it OK that they tap into the fire supply line downstream of the fire protection vault (red line below)?
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