I have lost over 90% of my water pressure how do I get it back?:(

Are you on a well or municipal water?

Municipal water. What happen was I had a water line piped in to a waterfall and when the water was turned back on there was little to no water coming out the kitchen faucet. All other faucets have excellent pressure. I'm puzzled:confused:

Turn off the water leading to the waterfall and see if you regain pressure.

If you do then the network of water pipes within your home has been compromised. By this I mean that the line leading to your kitchen probably was tapped into. It also depends if the pipe to the waterfall is larger than the pipes within. Usually these are 1/2 inch within the house and 3/4 leading from the main meter.

If you do get pressure back, I would suspect the plumbing job was done incorrectly.

I have not turned it on yet. It's newly installed. Will that still affect my line?

I would then suspect a leak somewhere. Verify the areas around where the lines were tapped into to see if you have any spots that are damp. Also, some obstruction could be the problem if dirt or debris got into the lines.

Water is naturally going to take the least resistance. You may simply not have enough water coming in to supply all the uses you now have for it. A waterfall can take a lot of water, if it is easier for the water to go to the waterfall it will. You need to have some form of restriction (valve or orifice)on the line to the waterfall to divert some of the water to the rest of your home. You will find that this will be especially true if you have an upstairs with a bathroom.

One option may be to have a booster pump installed. Usually it is more economical to use a recirc pump on the waterfall.

One more thought: If the line to the waterfall for only ofr make-up water, then you may have a valve sticking open at the waterfall.

Grounds are dry, just cut grass. I can't see anything it was placed on the main water
Line at the street. It seems okay. Dirt or debris how can that be cleaned out? Is that
Something that I can do or do I have to call the installer back with this problem?

At this point I would call the installer and have him blow out the lines if that is the problem. Either way he was the last one to touch the lines before you noticed the problem. Right?

Yes, he was just 5 days ago. Thanks for your help guys.