I am replacing an unknown make kitchen faucet with a Delta pull-out. The old faucet has a side spray. The new Delta (not yet purchased) comes with a soap dispenser.

The installation docs don't show hole diameters. Another Delta tech doc shows the dispenser collar diameter, but not the hole diameter.

The Delta faucet is available at my local Home Despot (per HD.com site), but to avoid no joy when I disassemble the spray, thought I post for experience about dropping a soap dispenser into a spray hole.

Thanks.