Thank you all for your comments. A little more info should have been supplied in my original post. I have a boil pot piped, thru a pump, to a counter flow chiller followed by an ice bath and then directed to the fermentor. I wanted to design a closed system from boil to fermentation.
I agree with all that the boil-mash equipment does not have to be sanitized, just clean. Hot water is recommended for rinsing and STAR SAN for sanitizing. My question was, can I add STAR SAN to the hot water being pumped thru the entire system rinsing and sterilizing at the same time ?
FYI, I have since spoke to an engineer from STAR SAN who informed me that STAR SAN HB becomes more effective at elevated temps than it is at room temp. Very good news to me. Now final rinsing and sanitizing can be done right before a brew session with minimum effort.