JoyTube 5 Packs Check Valve 1/8”(3MM) One-Way PVDF Plastic Hose Barb for Liquid Air

Might sound a little silly to "rave" over a check valve. I mean, it's just a little plastic valve for Pete's sake. But I need to write this review for 2 main reasons. FIRST, it's pretty hard to find check valves for 1/8" I.D. tubing. Most are for 3/16" and larger. SECOND, whenever I DID find tiny little check valves for tiny little hoses, THEY BLEEPING COST MORE THAN THE LARGER CHECK VALVES! These guys are EXACTLY what I've searched for, for quite a long time. In other words; SMALL, tiny hose I.D., solvent-resistant polymer components (PVDF, which is a slightly "harder" version of PTFE [Teflon]), and AFFORDABLE!!

Less expensive compared to purchasing OEM check valves and work just he same.

They are of excellent quality and also reasonably priced. For gravity applications (enema) not so good. These have a cracking (opening) pressure. I need one with no or almost no opening pressure. The description lacks this important information.

I bought these to use with my fugi Q5 airless spray gun. They are the same exact type and work very well. Just like the ones that came originally worh the gun.

The media could not be loaded.  Out of the 5pack, 3 of them leak back slow.

I use them for my hvlp paint guns

These items were as described and work as expected.

They work, but either they require too much pressure to allow flow or they don't allow enough volume to flow for my application. I need to keep water from running back down a line when the dispenser stops, which it does, but now the dispenser is working way too hard and only a trickle comes out.