Take the screen out in the end of the spout. Lots of times, minerals or rust in the line will break loose when you shut the water off and work on a line and plug the screen. The new faucet may have a flow restrictor in it that the old one didn't have.
That squeal you here is a very acute vibration that comes from the washer as it touches down on the base of the tap, it is normally caused due to very high water pressure.
PRV
Call the water board, if you can't turn the pressure down on the boiler.
It's a matter of air pressure that acts on the water. When the straw is uncovered, there are two forces acting on the water inside. There is gravity, pulling the water down, and air pressure. The pressure is about the same on both ends of the straw, but on the top of the straw, the pressure pushes the water downward, and on the bottom of the straw, the pressure pushes upward. Both of the pressures are the same, so the net force is just the force of gravity pulling the water down and out of the straw. When you cover the top of the straw, you block the air from pushing down on the water. In this case, the only forces on the water are the air pressure pushing up, and gravity pulling down. However, the air pressure is a greater force than gravity, and keeps the water in the straw despite gravity's pull.
There is usually a main water valve that comes into the house, locate this valve and turn it down. Installing a pressure reducing valve after water main valve will allow for adjustment of water pressure to proper setting.
Water is coming down from upstairs or it is back pressure from the water heater. If it is the water heater, it can come out of either side of the faucet.
Generally this is caused by pressure being built up from the water getting hot in the hot water heater. By code you should have a hot water heater expansion tank on the cold water inlet of the water heater to absorb the added pressure. If this is your problem, the excessive pressure could possibly burst your water heater. The faucet stem or cartridge or washer may be loose or moving and blocking flow.
Down the drain
I would purchase a Watt water pressure guage from your local home improvement or hardware store and check your water pressure at your faucet. If water pressure is greater than 40-45psi your regulator needs to be turned down where the water comes into the house.
That squeal you here is a very acute vibration that comes from the washer as it touches down on the base of the tap, it is normally caused due to very high water pressure.
I watch the water from the leaky faucet trickle down.
When your house is fed by a pump, it is fed into a water tank. That tank has a layer of air under pressure on top and water underneath. When you turn on a faucet, the air pressure forces water through your faucet. When your water pressure gets low, the pump turns on. Then the pump fills up your tank. Every now and then, the tank loses all its air and gets completely full of water. When that happens, you hear loud hammering. Then you have to bleed the tank by getting rid of all the water in it. You save enough to clean it. Hopefully, you can find the directions that came with it. If you can't, here is a procedure that has been used. You shut down the electricity. You drain the tank. You clean it out. You get rid of the gunk that built up. Then you close it up. You turn on the pump. The water that runs in compresses the air in the tank. That will give you the water pressure when you turn on your faucet before the pump kicks in.
It is because velocity is inversely proportional to the cross-sectional area. As the water runs down from the faucet it changes velocity because of the pull of gravity, hence the liquid will be narrower as it falls down the ground.
The shower gurgles because the water is going down the pipes.
Stoppage down stream
The mesh filter at the head of the faucet is clogged. Take it off, clean thoroughly and re-install.
When you took the aerator off the spout, did you run the water to see if it was full pressure? If it isn't full pressure with the aerator off, sometimes stuff gets plugged in the spout itself. Sometimes you can stick a wire down it and get rid of it.