The most frequently used tubing size is typically 1/4 inch.
The most frequently used tubing size is typically 1/4 inch.
The thick tubing walls are typically 1/8", so include this when determining the outer diameter.
Goldflag:
I need some thoughts on the most frequently used tubing sizes (ID and OD) for watercooling. This tends to be a subjective question that can spark debate, but it’s actually straightforward—just match the pump outlet size to the appropriate tubing throughout your loop. For instance, the Swiftech MCP 655 with its forged barb outlet is 1/2" ID; if your pump is built for that output, why alter the tubing size? Regardless of your pump’s design, stick to the size it was intended for as your guide for ID sizing.