Poor hot water pressure form Delta single lever faucet

can be a number of issues: clogged aerator, water supply is turned off, or supply lines are kinked, debris behind cartridge blocking flow, rubber seats out of place.... What has changed to cause problems?

The tip should be pointed straight down.Thank you.

clean the screen out on the end of the spout

Yes, debris from water heater replacements often breaks lose and gets stuck. The problem could potentially be anywhere between water heater and the faucet. The faucets shut off valves or the Delta faucet cartridge itself. Turn the hot and cold water valves off under the sink and disconnect the water supply lines from the faucet. aim the water supply lines into a bucket and turn the valves on one at a time. If there is a significant reduction in the water pressure and volume on the hot water side, you need to replace the shut off valve. If there is no reduction in water pressure, you need to clean and/or replace the Delta faucet cartridge. Contact Delta to receive free replacement parts.

No you do not need a plumber,
below under the sink, there are two valves, One for Hot ,One for Cold.
Turn them to the right.make sure they are turn all the way with a little pressure at the end. Now the kitchen has no water.
With a wrench ot pliers remove the water hoses, There may be a little water left in the hose so don't panic.
Now this may be a little harder.
Put yourself all the way under the sink,with you on your back.
Do you see the taps. There may be a fitting with screws. remove screws and fitting. You should be able to remove the whole Tap.
With you new tap... Follow their instruction.
When you are putting the hoses back on.. make sure they are slightly snug.
We don't want it to leak again.
Turn you water back on and slowly turn on your taps.

I don't know if this is your problem or not, But I had a new faucet and it did the same thing. I found little tiny pieces of polishing media stuck in side the faucet. Every time you turn on the water it comes out fast , then trickles, drove me nuts, I took it back and got another, no problem, hope this helps.

start by making sure the valve that supplies hot water to the sink and dish washer is fully open. If there is low hot water pressure in any of the other kitchen/bathrooms, then trace the line to see where the pressure drops. If it is only in the kitchen, it should be an old valve, (causes restriction)Good Luck.

water heater

Debris in the valve is a fairly common cause for stopping water flow in single lever valves. You can first check the aereator and remove any debris that may be there at the faucet itself. Then you can try to remove the ball at the control lever. You have to be careful and make sure that you do not drop any parts. Especially if this is a recent installation, you may find a large piece of something there.

It could be one of two problems, one simple, one serious.

• Easy fix
  

1. Turn off hot water angle stop under sink to faucet.
2. Remove supply line from hot angle stop.
3. Place end of supply line in a small bucket to catch some water.
4. Turn on cold water for a couple of seconds and backflush debris from faucet.
5. Reconnect supply line.
6. Turn on angle stop and test
   

• Complex fix

If you have steel pipes you may be experiencing reduced flow due to corrosion in your pipes. Reduced hot water pressure in the kitchen faucet is usually the first sign since this is the faucet that is most used in the home.

Repiping is a job for a professional. Another symptom you may need a repipe is orange colored or rusty water.