I recently bought an under-the-sink drinking water filter, a model from GE, and I got stuck trying to hook it up to the cold water line.
The package came with a simple plastic tee that had a 1/2 inch MIP, a 1/2 inch FIP, and a 1/4 inch connection for the tubing that goes to the filter. My trouble is that I don't have any 1/2 inch connections after the shut-off valve -- the connections there are 3/8 inch compression connections (I'm slowly learning the difference between the various fitting types).
I've been trying to find fittings that would let me adapt the plastic fitting that came with the filter for my situation, something like the following:
shut-off -> 3/8 fem comp x 1/2 mip -> plastic tee -> 1/2 tip x 3/8 male comp -> water line to existing fixture
But I can't seem to find anything like a 3/8" female compression to 1/2" MIP adapter. It also seems like having more joints in a plumbing system might cause problems, so using the fewest fittings possible sounds like a good idea.
Is there a better way to do this? Some way of avoiding the included plastic tee?
So, to restate my problem, how can I accomplish the following:
shut-off, 3/8" m comp -> 3/8" f comp x 3/8" m comp -> 3/8" f comp fixture line
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v
1/4" quick connect tube