I installed a new single-handle kitchen faucet with a sprayer. Is it possible to replace the sprayer with a water filter (I have only one hole on the side in the sink)?
Specifically, would it work to connect an under-sink water filter inlet line to the faucet's sprayer outlet? That is, as opposed to connecting the filter inlet to the main cold water inlet (via a T connector).
Reason: I want to avoid touching the connections between the inlet copper pipes and the "tubes" that go to the faucet, if possible.
Best Answer
The diverter valve built into your faucet is downstream from the faucet valve that is designed to hold back "line" pressure. The diverter shunts water toward the spray head when you open the spray head valve, and directs it toward the fixed spout otherwise.
The faucet sprayer head/nozzle is not designed to hold back system pressure. They would have to be more robust to the point of being unwieldy to do that. Also, the main valve is where hot and cold are mixed, giving you temperature adjusted water at the sprayer head. If you hook directly to the spray head it will leak.