How to remove kitchen sink sprayer hose

hosekitchen-sink

The sprayer is cracked and leaks like crazy. The replacement I bought does not fit on the existing hose. I thought this would be a real easy to remove the existing hose and put a new hose and sprayer in. I think it's one of those quick-disconnect types, but I can't figure out how to disconnect the sprayer from under the sink. Please see the pictures below. Any ideas would be helpful.

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Edit: For reference, I have recently learned that this assembly is a Pfister Marielle faucet.

Best Answer

It is a "push-to-connect" fitting. You disconnect by pushing the tube, pushing the gray ring, then (while still pushing the gray ring) pulling the tube:

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