1. Check Other Faucets

• If other faucets in the building have low pressure, the issue may be with the main water supply.
• If only the shampoo bowl faucet has low pressure, continue troubleshooting below.

2. Clean the Aerator
The aerator (small screen at the tip of the faucet) may be clogged with debris or mineral buildup.
Fix:

• Unscrew the aerator using pliers (wrap in a cloth to prevent scratches).
• Rinse it under water and scrub with a toothbrush.
• Soak in vinegar for 30 minutes if clogged with mineral deposits.
• Reattach and test the water flow.

3. Inspect the Spray Hose (If Applicable)
If your shampoo bowl has a sprayer, the hose or nozzle may be clogged.
Fix:

• Remove the sprayer head and check for debris inside.
• Clean with vinegar and a toothbrush.
• Ensure the hose is not kinked or twisted.

4. Check the Faucet Cartridges or Valves
The faucet’s internal cartridges or valves may be blocked.
Fix:

• Shut off the water supply.
• Remove the faucet handle and inspect the cartridge (or washers in older models).
• Clean or replace if needed.

5. Flush the Water Lines
Debris in the supply lines can reduce pressure.
Fix:

• Shut off the water supply.
• Disconnect the supply lines from the faucet.
• Place the lines in a bucket and turn the water back on briefly to flush out debris.
• Reconnect and test.

6. Check the Water Supply Valves
If the shut-off valves under the sink aren’t fully open, they can restrict water flow.
Fix:

• Turn both hot and cold water valves fully open.

7. Look for Leaks or Blockages in Supply Lines
A leak or partial blockage in the water supply hoses can lower pressure.
Fix:

• Inspect hoses for kinks, damage, or leaks.
• Replace any faulty hoses.

8. Check the Water Heater (For Hot Water Issues)
If only hot water has low pressure, sediment buildup in the water heater may be the cause.
Fix:

• Flush the water heater to remove sediment.

When to Call a Plumber
If none of these solutions fix the problem, you may have a more serious plumbing issue (such as a partially closed main valve, pipe corrosion, or a pressure regulator issue). In that case, it’s best to contact a professional plumber.