Since the water travels through the hose and not the spout itself a leak from the base of the spout would be very unlikely.
Delta arabella kitchen faucet leaking.
Replace o rings 1 in diagram repair part rp2055 leaks from aerator.
Leaks from under the handle.
For faucets purchased prior to 2007 please order rp1050 cap and rp61 cam and packing.
Replace stem unit assembly 3 in diagram repair part rp1740.
Replace ball assembly 1 in diagram repair part rp70 as shown for lever handles or rp212 for knob handles replace cam packing 2 in diagram repair kit rp61.
Replace the hose if it is damaged or leaking.
Delta single handle ball valve faucets are among the least troublesome to repair although the fact the valve is spring loaded can make disassembly a little finicky.
Replace stem unit assembly 3 in diagram repair part rp1740 leaks from base of the spout.
Replace seats and springs 4 in diagram repair part rp4993 if leak persists.
If this occurs check the connection of the hose to the spray wand.
Leaks from under the handle.
Leaks in this type of faucet usually can be fixed with a new neoprene valve seat and spring.
When one of these faucets.
With a stem style faucet a neoprone valve seat and spring fits into the water inlet port in valve body.