From the post above. I made the change from 1/2" tubing to 3/8" today. I do not even have all the air out of the system and my temps are about 1c cooler. I contribute this to a smooth flow through the entire system and less backpressure on the pump. I have tried Tygon, Silicon, and reinforced tubing and nothing compares to 1/8” thick 3/8” Latex tubing. The Latex tubing can be bent nearly into and it holds it shape. When stretched over a 1/2" fitting you would not need clamps of any kind. I made a mistake while pushing the tubing onto a barb, I could not pull the tubing off of the barb. This is the tubing found on slingshots, but thicker.
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