What is YOUR policy for topping off a 410a system after the leak is fixed? A few years ago we were told to reclaim it all and recharge if the standing pressure didn't meet the PT chart within one degree. Any leak always showed a 8 degree difference from what it should be. Now they say it's perfectly fine to leave what's left of the old in and simply add what's needed. That just sticks in my craw something fierce since it's not a proper blend anymore. Do you reclaim it all or just refill?