Ajax, I would stand the coolant out in a open container and perferably the sun, and let some water evaporate. I personally do not know but would be concernd about boiling, my change the composition of the antifreeze, but I am not for sure. Give it a try, and report back. I wish I could have been more help, but I am running a batch system. One hot July I ran a lot of shot before I had a cooling system, and was getting steam from the antifreeze. After two - three hundred pounds, the coolant had changed from the overheating, and the shot never was as good. JollyTrapShooter, nice photos, and your system is similar to mine,and I do have the over flow at the top, and I am to running a batch system, but I have a shut of valve at the bottom and open it when running into a 1/2 gallon bucket that has a submersible pump, and the coolant is run through a radiator that is submersed in a container filled with water, and then back into the coolant tank. I am running the the system outside. I have the outside tap hose running over the the submersed radiator. Very little tap water is need to keep things cool. How many pounds can you put into your shot collection basket? I have done up to 90 lbs with mine but it is hard on the back, so I try to keep it under 75 lbs. I bought some larger 50mm ammo cans, had a local shop make side plates to extend the sides were you now have wires, drilled some holes and bolted the plates to the side, and drilled one 1/2 in hole at the top of the plates. Ran 1/2 in threaded bar, with PVC pipe over the top to cover the threads, through the side plate holes, and bolted the 1/2 in rods to the side plates. Make a very strong handle. (Purchased 1/2 inch rod at Homdepot) 10tenner