Attaching RODI to PEX plumbing

[Ross]

There is no point introducing pvc into the supply line.

I would:
Tee off from your main line with PEX crimp fittings
Run a branch over to the RO unit.
Add a ball valve where convenient to operate.
Then step it down to a 1/4" quick connect to go to the RO unit.

This ensures that the main lines in the house are using pex crimp rings. The quick connect is after a valve so that if any issues arise you can ensure that its off.

Personally I don't trust the shark-bit fittings or any other quick connects.
The slightest damage to the exterior of the pipe before installation or the o-rings during and you have potential for failure.

[tlhood]

PEX crimp tool is pretty expensive for the one small job that I would be using it for. =/

[Ross]

Originally Posted by tlhood

PEX crimp tool is pretty expensive for the one small job that I would be using it for. =/

Probably a lot cheaper than your insurance deductible for a flooded house.
Most hardware stores rent them for $10-$15 for 4hrs.

[babnika]

If you have a sink nearby you could use screw on adapter on a water supply line. I rely like this one
http://cdn.bulkreefsupply.com/media/...-grouped-a.jpg

[tlhood]

Originally Posted by babnika

If you have a sink nearby you could use screw on adapter on a water supply line. I rely like this one
http://cdn.bulkreefsupply.com/media/...-grouped-a.jpg

I currently have it attached under a sink, but I want to keep it out of the bathroom (which is where the sink is).

[tlhood]

Much better. The rodi line was extended with pex T-Ed off further up and it ends in a nice valve.

[hillegom]

[sphelps]

Originally Posted by tlhood

PEX crimp tool is pretty expensive for the one small job that I would be using it for. =/

Hardware stores rent them for around $10. Some smaller ones like home hardware often even rent them for free provided you pay the deposit.

[Ryanerickson]

If you don't wanna rent crimping tool use shark bite fitting they are Csa approved. Use a shark bite tee to cut into line outta that a shark bite valve 1/2 x3/8 then use a John guess 3/8x1/4 coupling this is just one Wayne doing it. the valve above in pic would be perfect but in all my years plumbing never seen that fitting for sale good luck.

[Ryanerickson]

By the way if you use a compression fitting anywhere with the plastic John guess pipe you need a metal sleave inside the pipe or it will let go at some point and flood your house. It's a little 3/4 inch long brass looking piece that slides inside pipe so when you tighten fitting it does not just crush the pipe.