I recently hard plumbed in my machine, in a home I am renting, while I wait for my home to be repaired from hurricane Michael.
Purchased these items below from Amazon. The tee splits it to the sink faucet and machine.
LASCO 06-9111 Angle Stop Add-A-Tee Valve, 3/8-Inch Compression Inlet X 3/8-Inch Compression Outlet X 3/8-Inch Compression Outlet, Brass
APEC Ultra High Capacity Under Sink Water Filtration System - Premium Quality US Made Filter (CS-2500)
API Test KIT Individual Aquarium Water Test Kit
(tested water at 40 ppm KH and 80 ppm GH)