صمام عدم رجوع ø 1/8"M-1/8"M NPT

The 1/8" NPT threads machined perfectly on both sides, giving me a leak-free seal on the first try. I've had zero backflow issues since installing it on my small brew setup, and the brass body feels durable enough to last for years.

Tiny thing, but it does exactly what it's supposed to — stops backflow in my espresso machine's line without leaking a drop. The threads seated snugly with just a bit of tape, and the one-way action is firm but not stiff.

The 1/8" NPT threads cut in cleanly with no cross-threading, and the valve holds back flow exactly as it should. Used it on an air line and it’s been leak-free for three weeks now.