Air in hot water tap: the ultimate guide to unclogging the culprit

If your hot water tap is spitting air, it’s not just an annoyance – it can also be a sign of underlying plumbing issues. Understanding the causes behind this air-spitting behavior is crucial for finding an effective solution. In this comprehensive guide, we’ll delve into the various reasons why your hot water tap may be spitting air and provide practical steps to address them.

Causes of Air in Hot Water Taps

1. Trapped Air in Plumbing Lines

When water is heated, it expands, releasing dissolved air. This air can become trapped in the plumbing lines, especially if they have been recently installed or repaired. As the hot water flows through the lines, the trapped air gets pushed out, causing the tap to spit air.

2. Faulty Pressure Reducing Valve

The pressure reducing valve (PRV) is responsible for regulating the water pressure in your home. A faulty PRV can allow too much air into the water lines, leading to air-spitting taps.

3. Water Hammer

Water hammer occurs when water flow is suddenly stopped, creating a pressure surge that can damage pipes and fixtures. This surge can also release trapped air into the water lines.

4. Leaky Faucet

A leaky faucet can allow air to be sucked into the water line when the tap is closed. This air can then be released when the hot water tap is turned on.

5. Corroded Pipes

Over time, pipes can corrode and develop pinholes. These pinholes allow air to enter the water lines, causing the tap to spit air.

6. Loose Connections

Loose connections between pipes or fixtures can create gaps where air can enter the water lines. This can happen during installation or due to wear and tear over time.

7. Air Vents

Air vents are installed in plumbing systems to release trapped air. If the air vent is clogged or damaged, it can prevent air from escaping and cause the tap to spit air.

Troubleshooting and Solutions

1. Check for Trapped Air

Run the hot water tap at a low flow rate for several minutes. If the air bubbles gradually disappear, it indicates trapped air in the plumbing lines.

2. Adjust Pressure Reducing Valve

If you suspect a faulty PRV, adjust it according to the manufacturer’s instructions. If you’re not comfortable doing this, call a licensed plumber.

3. Eliminate Water Hammer

Install water hammer arrestors on faucets and appliances to prevent pressure surges.

4. Fix Leaky Faucet

Repair or replace the leaky faucet to prevent air from being sucked into the water line.

5. Inspect Pipes for Corrosion

Check pipes for signs of corrosion, such as rust or pinholes. If corrosion is present, call a plumber for pipe replacement.

6. Tighten Loose Connections

Use a wrench to tighten any loose connections between pipes or fixtures.

7. Clean Air Vents

Locate the air vents in your plumbing system and clean them of any debris or blockages.

Final Thoughts

If you’ve tried the troubleshooting steps above and your hot water tap is still spitting air, it’s best to call a licensed plumber. They can diagnose the underlying cause and implement a permanent solution. Remember, ignoring this issue can lead to further plumbing problems and water damage.

Frequently Asked Questions

Q: Is it safe to drink water from a tap that spits air?
A: Yes, it is generally safe to drink water from a tap that spits air. However, if the air-spitting is persistent, it may indicate a plumbing issue that requires attention.

Q: Can air in the hot water tap cause damage to appliances?
A: Yes, air in the hot water tap can damage appliances such as dishwashers and washing machines. The air bubbles can interfere with the water flow and reduce the efficiency of the appliances.

Q: How often should I check for air in my hot water taps?
A: It’s a good idea to check for air in your hot water taps every few months. If you notice persistent air-spitting, investigate the cause and implement the appropriate solution.