I"m removing and replacing a

hi use this:

Superior Tool 11-in Basin Wrench

Superior Tool11 in Basin Wrench

Are you trying to just replace the sprayer? I replaced the whole unit so cannot help with just the sprayer.

Shut off main water to home. Then check if a clip is guarding the nut to nut threaded connection the use 2 wrenches to un screw.
Cover tools "teeth" with tape or thin rubber to prevent marking on chrome/etc finishes.

Go ahead and buy the new hose ant it will come with installation instructions and you will see how it comes apart at that joint.

You may have to put a new repair kit in faucet, but you might try tightening the adjusting nut under the handle. Loosen set screw in handle, and remove handle. There is a nut there with 4 notches in it. Delta gives you a combo allen wrench/spanner wrench for this. Try to tighten this nut. If you can't you can buy a new repair kit for this valve for about 10.00 that comes with wrench

A "basin" wrench will be needed to get up under the sink/faucet base to tighten the nuts that hold the faucet in place. It's a simple job but requires the agility of a contortionist to get at.

You need to puechase a basin wrench

To fix the leak in delta faucet is have a repair kit for
Delta 470-WHRS. The repair kit consist of O-rings
replacement. Otherwise, you have to buy a replacement
for your Delta 470-WHRS.

Turn the water off at the faucet, remove the handle and the retaining nut that is apart of the trim. You will see where you can use a wrench to remove it. The ball assembly will come right out and you can replace the washers right below it. Put it back together and if needed, tighten the tension ring that is on the retaining nut (usually grey or white in color) so it won't leak water around the ball stem. Good luck.

This could be a couple of things.

1. First remove the aerator from the wand and make sure you have plenty of flow with it off.
2. If there is flow clean or replace the aerator.
3. Remove the wand and look between the hose connection and the wand there should be a screen between them. Remove the screen and clean or replace.
4. Make sure hose is kinking under the sink.

If you need a diagram of the faucet with part numbers here is the link:

Delta 470

Hope this helps!