Spluttering taps, irregular water flow and vibrating pipes may indicate that you have air in your water lines.
Air usually gets trapped at high points in your water supply system, and to force this out, you have to temporarily increase the force of the water flowing through the pipes. The high volume of water created by turning on all of your taps causes a rush of water through your pipes that carries the air bubbles out of your water supply.
How to clear an airlock:
1 Check the main water supply valve to ensure that the water in your house is turned on.
2 Move through your house and turn on every hot and cold water tap, beginning with the tap closest to the main water supply valve. Work your way to the furthest tap.
3 Flush all toilets and run the water in all appliances or fixtures that use a water connection. For example, fill a cup with water from the refrigerator dispenser and run the dishwasher and washing machine through a rinse cycle.
4 Let the water flow for about 10 to 15 minutes or until it begins to flow normally at every tap, without any spluttering or banging.
5 Go back to the last tap you opened, farthest away from the main water valve, and turn off the water. At each toilet, turn off the tap that is closest to the main valve first, then flush the toilet. Wait about two minutes before closing the next taps.
6 Continue turning off taps. Work your way back to the first taps you opened until you’ve turned the water off at all taps and fixtures. This should eliminate the air pockets.
7 Contact a plumber to inspect your pipes if clearing the air from the lines doesn’t stop the problem. You may be dealing with water hammer or improperly sized pipes.
Loud thumps or bumps, followed by no pipe noises, are usually a sign of water hammer. Prolonged noises and vibrating are usually caused by air in the pipes. If noise or sputtering occurs when you close a water valve, or an appliance such as a dishwasher or washing machine switches cycles, it is more likely to be water hammer than air in the pipes.