Before calling a professional, be sure to try the reset switch located on the bottom of most disposals.
This is usually due to a sediment buildup in your tank. As water heaters grow older, they accumulate sediment and lime deposits. If these deposits are not removed periodically, the sediment will create a barrier between the burner and the water, greatly reducing the water heater’s performance level. At least once every three months, drain water from the tank. Draining a gallon or so on a regular basis helps remove the sediment.
You should also periodically inspect your water heater burner. The flame under the heater should appear blue with yellow tips. If it’s mostly yellow, or if it’s sooty under there, your flue may be clogged, which is a dangerous situation. Contact a professional to check it out. At least once every two years, have your water heater inspected by a service technician. He or she will also check the drain valve for signs of leakage, and the anode rods for corrosion
Noises can be fairly common in plumbing supply lines. If a washer in a faucet or valve is loose, you’ll hear it rattling or knocking. If the sound occurs when you open and close faucets rapidly, it generally means pipes are loose, and can be corrected by anchoring pipes more securely. If it really bothers you, you can add air chambers at the end of long pipe runs. Their installation will probably require a plumbing professional.
Do not rinse fats or cooking oils down the kitchen sink. Liquid fats solidify in the cold pipes and create clogs.
To help prevent clogs, fit all your tubs and shower drains with a strainer that catches hair and soap chips, and clean the strainer regularly.
First, check the emergency shutoff under your sink to make sure it’s fully open. If rubber washers or seals have begun to deteriorate, you’ll also lose water pressure, so check those. Calcium and lime buildup will also cause low water pressure.