Legris 6316 60 00WP2 LIQUIfit Push-to-Connect Fitting, Inline Bulkhead Union, 3/8" Tube OD

Used this as a CO2 line bulkhead on a homemade CO2 reactor for an aquarium. Works great, air tight and no leaks.

Works then doesn't, anytime the tubing gets moved it drips, until re-push. Maybe I just got a bum one, as I haven't tried others of this brand.

I try my best to avoid posting negative reviews and clear things up with the seller... but these things leaked (I ordered 2, both did.) I used 1/4" OD Polyethlene tubing as well as tested them with 1/4" OD clear plastic tubing, being sure to push the squarely cut tubing in as far and as snug as possible. No success with either, and seemingly no way to get in touch with the seller. Slightly disappointing, but not worth the $ to ship back and try to return.

I used one of these to turn a 5 gallon bucket into a reservoir. I added silicon to the bulkhead just to be safe. It's working well.

I installed this in a 5 gallon container to make it an auto top off for my saltwater tank. i used 1/4" water line and plumbed it to a float in the sump. no leaks and is a quick disconnect if i have to move the tank.

This fitting is well constructed and easy to use. It's made from quality materials, and although I haven't put it in use yet, I would have complete confidence it will serve it's purpose well.

Best one on market that I know of. Has double oring. Double nuts to adjust either in or out. Nuts fit tight and secure.

These worked great for the lids on my BRS calcium and alkalinity containers. I have a Bubble Magnus dosing pump and needed to route 1/4" tubing through the containers. These give the setup a professional look. Just drill the hole and screw these bulkheads on. Super simple.