RO Output Restriction?

[SeanD]

I have a Deer Run 250 that has 1/2" I.D. flexible lines for the permeate and concentrate outputs. I need to extend my permeate line so that I can reach some extra storage tanks. I'm using a 1/2" insert fitting to add the extra line. The insert fitting reduces the I.D. of the line a bit. I didn't measure it, but I can see the ID of the barbed end is a bit smaller than the NPT side.

Will the smaller ID on the permeate create a restriction that would have any kind of effect on the flow rates of the RO itself?

[Bricklayer]

You will be fine, if using the same ID tubing that is comming off the RO.
1 or 2 fittings in a line would not create enough restriction to effect anything.

[maple flats]

Bricklayer is right, but if you use a SS insert coupler the restriction will be far less, beside it will last forever, the plastic ones fail after a few years and could fail and pump a lot of permeate on the ground, as well as if the outlet end of the line is in the permeate it could siphon that tank empty.

[BAP]

You could use an external compression coupler that would not restrict flow. The other option would be if you are adding a lot of distance, would be to change the hose at the RO to 5/8 or 3/4 in however long you need for less restriction over the distance.

[SeanD]

All good info. Thanks for the input.