Srayer leaking down the hose from pivot joint near spray head

shut water off, remove hose from faucet under neath sink. remove hose, reattach spray head and push hose thru faucet and reconnect under sink.

I've had problems with the O-rings at the head leaking, feeding back inside the corrugated hose covering, and pooling under the sink. Might be your problem as well. Verify by holding the head downward, and look for water beading out further up the hose.

follow this steps and fix it. God bless you

1. Remove the shower head from the pipe.
2. Clean the arm threads and wrap them with plumbers' joint tape.
3. Screw the head back on and hand-tighten it. Remove any excess compound or tape.
4. Test and retighten as needed.

Repair a shower head that leaks at the swivel:

1. Unscrew the shower-head body from the swivel-ball ring.
2. Find the O-ring or a similar seal inside. Replace it and screw the shower head back into place.
3. Turn off the water supply and open the faucet handle to relieve water pressure.
4. Carefully loosen the coupling nuts at the shutoff valves and at the base of the faucet.
5. Carefully remove the supply tubes.
6. Remove the locknuts that hold the faucet to the sink and lift the faucet out.
7. Clean the area where the old faucet sat.
8. As needed, install the new spray hose and supply tubes, if any, through their holes in the sink.
9. Set the rubber gasket that came with the faucet on the sink where it will be mounted. If no gasket is supplied, apply plumber's putty.
10. Set the faucet into position and center it.
11. From under the sink, attach the faucet locknuts to hold it to the sink.
12. Reinstall the supply lines, then turn them on and test the faucet. Turn it on carefully because the line and faucet have air in them.

make this steps and fix it. God bless you
f a faucet leaks, replace seals and gaskets . If a shower head leaks, create a better seal or replace seals .
If a sillcock wears out, replace the washers .
If a compression faucet drips from the spout, replace the washer and/or the seat .
If a faucet leaks from the handle, replace O-ring(s), replace the packing washer, tighten the packing nut, or replace worn packing, depending on the valve type.
If a ball or cartridge faucet leaks from the collar, replace worn O-rings .
If a disk faucet leaks around the base or has reduced flow, replace cracked or pitted disk assembly or worn inlet seals
If there is water under the sink, tighten the faucet-set locknuts under the sink. You also can replace putty or a gasket, replace a worn faucet, or replace leaky supply tubes .
If the aerator leaks around the edge, replace the washer in the aerator
If the spray hose leaks or has reduced flow, replace the O-ring on the diverter valve, replace a worn washer at the base of the spray head, or clean the diverter valve and spray head

make this steps and fix it. God bless you
f a faucet leaks, replace seals and gaskets . If a shower head leaks, create a better seal or replace seals
If a sillcock wears out, replace the washers
If a compression faucet drips from the spout, replace the washer and/or the seat
If a faucet leaks from the handle, replace O-ring(s), replace the packing washer, tighten the packing nut, or replace worn packing, depending on the valve type
If a ball or cartridge faucet leaks from the collar, replace worn O-rings
If a disk faucet leaks around the base or has reduced flow, replace cracked or pitted disk assembly or worn inlet seals
If there is water under the sink, tighten the faucet-set locknuts under the sink. You also can replace putty or a gasket, replace a worn faucet, or replace leaky supply tubes
If the aerator leaks around the edge, replace the washer in the aerator
If the spray hose leaks or has reduced flow, replace the O-ring on the diverter valve, replace a worn washer at the base of the spray head, or clean the diverter valve and spray head

follow this steps and fix it. God bless you
If a faucet leaks, replace seals and gaskets .
If a shower head leaks, create a better seal or replace seals .
If a sillcock wears out, replace the washers .
If a compression faucet drips from the spout, replace the washer and/or the seat .
If a faucet leaks from the handle, replace O-ring(s), replace the packing washer, tighten the packing nut, or replace worn packing, depending on the valve type .
If a ball or cartridge faucet leaks from the collar, replace worn O-rings .
If a disk faucet leaks around the base or has reduced flow, replace cracked or pitted disk assembly or worn inlet seals .
If there is water under the sink, tighten the faucet-set locknuts under the sink. You also can replace putty or a gasket, replace a worn faucet, or replace leaky supply tubes .
If the aerator leaks around the edge, replace the washer in the aerator .
If the spray hose leaks or has reduced flow, replace the O-ring on the diverter valve, replace a worn washer at the base of the spray head, or clean the diverter valve and spray head .

Check the hose connections at the spray head nozzle it sounds like it is leaking there and running down the hose and ending up under the sink.

Delta comes with a limited lifetime warranty. call them to get free parts. I believe you will need to check several things. Remove the spray head from the sprayer hose, point the hose into the sink drain and turn the faucet on. If it no longer makes the banging noise, replace the spray head. You need to look for a leaking spray hose under the sink also. If the faucet is making noise, replace the ball and cam assembly under the faucet handle. One other thing that I have run into is that the shut-off valves under the sink can also go bad and cause banging and vibration.

Remove spray head then faucet tighten connection on the spray hose

Start by removing the spray head from the hose. Pull the spray head out and with a channel lock pliers unthread connection between the spray head and hose. BE CAREFUL not to let the hose fall back down into the faucet. With the hose directed down toward the sink test for volume by turning on the faucet. If you get a nice volume the problem is in the spray head. This is usually the case. Put the spray head back on then remove the aerator. It's the screen where the water comes out of the spray head. Clean out the assembly ( 3-4 parts). Reassemble and test.

Good luck, Phil