can this be connected to the water line instead of the faucet head?

Dear Customer, I am very sorry. Your question is not very clear but I think my answer below may help. This system is an under-the-counter Reverse Osmosis drinking/cooking/icemaker water purification system. The purified water needs to be dispensed out of a drinking faucet that we include. This pure water out of the system cannot connect directly to a sink faucet. I hope this information is helpful. Best Regards, APEC Product Specialist