I have purchased RO membrane flush kit to try it at home.
Just in case you want to make it yourself I will list all
items kit includes:

2 Jaco Tee (Part # JACOTEE)
1 Jaco 1/4" male to 1/4" tubing (Part # JACO14S)
1 Ball Valve, 90' angle type (Part $ BVJACO)
2 ft. Orange 1/4" tubing
"Setup Instructions" (single, letter size page)

It is more economical to buy the kit then to collect single parts.
At least if you shop at DrsFosterSmith.com - the kit is $12.99,
the tee is $3.49 each, ball valve is $6.49 and JACO14S is $1.49
Add a couple of cents for 2 ft. tubing at Home Depot
The kit installs the way it bypass the RO flow restrictor.
The flow restrictor is not included in the kit - you use one
from your RO filter - just move it after the ball valve.

I wanted to make another bypass in my system for my tank cooler
and buy parts for that like tees and ball valve, but I will buy
another "kit" to use parts from it, it is cheaper this way

BTW - do you know any cheaper retail source of JACO 1/4" fittings?

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