What is the correct distance for a PEX ring from the tubing edge before tightening the cinch clamp?

What is the correct distance for a PEX ring from the tubing edge before tightening the cinch clamp?

• A. 1/16
• B. 1/8
• C. 1/32
• D. 1/4

Answer: (A)

The important idea is to have a tiny gap between the end of the tubing and the edge of the cinch clamp so the clamp can bite into solid, uncompressed tubing and seat evenly. About 1/16 inch is the right distance. This small clearance lets the clamp engage the tubing properly without crushing the end or leaving the tube too far back, which could reduce grip or cause leaks. If the tube is pressed too close to the edge, tightening can deform the tubing or misalign the clamp; if there’s too much exposed tubing, the clamp may not secure as well. So 1/16 inch ensures a reliable seal and proper clamp engagement.

The important idea is to have a tiny gap between the end of the tubing and the edge of the cinch clamp so the clamp can bite into solid, uncompressed tubing and seat evenly. About 1/16 inch is the right distance. This small clearance lets the clamp engage the tubing properly without crushing the end or leaving the tube too far back, which could reduce grip or cause leaks. If the tube is pressed too close to the edge, tightening can deform the tubing or misalign the clamp; if there’s too much exposed tubing, the clamp may not secure as well. So 1/16 inch ensures a reliable seal and proper clamp engagement.