DŌS, J.G. Fittings, RO Tubes

[nickkohrn]

I have two Neptune DŌS units that are connected to multiple Vertex Libra containers via the tubing that came with the DŌS units. Unfortunately, I end up with air in the lines at the containers and at the heads of the dosers. I am thinking about connecting John Guest fittings to the dosers so that I can use RO tubes.

If I go this route, how will I know if there is air in the lines? Obviously, calibrating the dosers will be important, but is there a good way to verify that the change is positive other than calibrations?

 

[K7BMG]

I dont know the fitting that your containers use but the J.G. fittings will bleed air as well.
I just use a small amount of Silicone sealant on the tube before I inserted it into the fitting.
Have not had a air leak again.
Yes not as easy to disassemble if needed but it can be done.

 

[K7BMG]

I think others have used short pieces of RO tubing with a barbed coupling to attach the soft tube to.

But in the end I Siliconed every tube that I used being the soft DOS, RO, or the hard acrylic. They all wound up leaking air.

 

[infinite0180]

I did the JG upgrade with mine 6 months ago. I used high quality teflon tape on the threads, 3 wraps to be exact. I also used a razor to slice off the nipple where the old tubing would slide on. If you do it slow and take your time it will be completely air tight. Its evident when your DOS doesnt loose calibration after half a year... it just works, darn good. Believe me. Just keep an eye on it for a few days after its up and running and you will see that no air is getting in.

 

[Waters]

I have two Neptune DŌS units that are connected to multiple Vertex Libra containers via the tubing that came with the DŌS units. Unfortunately, I end up with air in the lines at the containers and at the heads of the dosers. I am thinking about connecting John Guest fittings to the dosers so that I can use RO tubes.

If I go this route, how will I know if there is air in the lines? Obviously, calibrating the dosers will be important, but is there a good way to verify that the change is positive other than calibrations?

Are you asking how can you tell if you have air in the lines? If so, I bought clear RO/DI tubing. I actually just replaced all my fittings on both of my DOS units. The trick for me was to make sure you press the RO/DI line into the fitting before you screw it on. I didn't use any tape or silicon at all.....I haven't had any leaks. There is also a mod where you can cut off the small plastic tip on your DOS heads to get a tighter fit but I don't think it is necessary.

 

[nickkohrn]

Are you asking how can you tell if you have air in the lines? If so, I bought clear RO/DI tubing. I actually just replaced all my fittings on both of my DOS units. The trick for me was to make sure you press the RO/DI line into the fitting before you screw it on. I didn't use any tape or silicon at all.....I haven't had any leaks. There is also a mod where you can cut off the small plastic tip on your DOS heads to get a tighter fit but I don't think it is necessary.

Perfect! That’s exactly what I wanted to know, so I should have been more specific. I didn’t know that clear RO tube is a thing, so that’ll be helpful.

Thank you!