just installed my ispring ro system and there's a leak where one of the plastic tubes goes into a fitting, how do i fix this?

That leak means the tube isn't sealed inside the quick-connect fitting. You need to push it in past a small rubber O-ring inside.

1. First, remove the blue lock clip from the leaking fitting. You can use your fingernail.
2. Pull the tube out completely.
3. Check the end of the tube. It needs to be cut square and clean.
4. Measure and mark 5/8 inch from the end of the tube.
5. Now, re-insert the tube into the fitting. Push firmly until you feel it pass a point of resistance—that's the O-ring. Keep pushing until your 5/8-inch mark reaches the fitting.
6. Pop the blue lock clip back on. That locks it.

IF THAT DIDN'T WORK: The O-ring inside the elbow fitting itself might be bad. Unscrew that elbow fitting and replace it with one of the spares from the kit. Wrap the new fitting's threads with Teflon tape before screwing it in.

HEADS UP: Check for leaks daily for the first two weeks. Use the included flood alarm for extra safety.