Fill/drain fresh water tank several times..
Then fill fresh water tank and using pump run water thru system hot and cold (hopefully water heater was BYPASSED) until pink is gone...then flush water thru 'low point drains'
Then sanitize system
1/4 cub bleach per 15 gallons of water (how big is your fresh water tank....fill with bleach solution) then using pump run bleach solution thru hot/cold water lines (water eater bypassed) just enough until you smell the bleach, also thru low point drains.
Let sit for 4 hours then drain/flush fresh water tank.....then fill and flush system hot.cold...low point drains
May take couple times to get rid of that 'vile' smell
