Why Your Bathroom or Kitchen Tap is Dripping and When to Call a Plumber

If you’ve ever stood by your sink and asked yourself, why is my tap dripping?, you’re not alone. A dripping tap can be more than just an annoyance—it can waste water, increase your bills, and signal a plumbing issue that needs attention. This post explains common causes of dripping taps in bathrooms and kitchens, offers practical advice on how to address the problem, and helps you decide when it’s time to call a plumber.

Close-up of a kitchen tap dripping water

Common Reasons Why Your Tap is Dripping

A dripping tap usually means there is a problem with the internal parts of the tap or the water supply system. Either a worn O-ring, corrosion of metal parts, or a faulty valve. Here are the most frequent causes:

1. Worn Out Washer or O-ring

The washer or O-ring is a small rubber or silicone ring inside the tap that seals the valve seat. Over time, washers wear down or become stiff, causing water to leak even when the tap is off. This is the most common cause of dripping taps in both bathrooms and kitchens.

2. Damaged Valve Seat

The valve seat connects the tap’s spout to the rest of the plumbing. If it becomes corroded or damaged, water can leak around the washer and drip from the tap. This often happens in areas with hard water, which leaves mineral deposits.

3. Loose or Worn O-Ring

The O-ring is a small rubber ring that fits around the tap handle. If it becomes loose or worn, water can drip near the handle or the base of the tap. This is more common in taps with a single handle.

4. High Water Pressure

Excessively high water pressure can cause taps to drip. When pressure is too high, it forces water through seals and joints that would normally hold tight. A pressure regulator can help if this is the cause.

5. Faulty Cartridge (for Mixer Taps)

Modern mixer taps use cartridges to control water flow and temperature. If the cartridge is damaged or worn, it can cause dripping. Replacing the cartridge often fixes the problem.

How to Check and Fix a Dripping Tap

Before calling a plumber, you can try some simple checks and fixes:

• Turn off the water supply to the tap before starting any work.

• Inspect the washer and O-ring for signs of wear or damage. These parts are inexpensive and easy to replace.

• Clean the valve seat if you notice mineral buildup. Use a cloth or fine sandpaper to remove deposits.

• Replace the cartridge if you have a mixer tap and suspect it’s faulty.

• Check water pressure using a pressure gauge. If it’s above 60 psi, consider installing a pressure regulator.

  
  

If you’re comfortable with basic plumbing tasks, these fixes can save you time and money. However, always follow safety guidelines and turn off the water supply before attempting repairs.

When to Call a Plumber

Sometimes, a dripping tap is a sign of a more serious problem or requires professional tools and expertise. Call a plumber if:

• The tap continues to drip after you’ve replaced washers or cartridges.

• You notice leaks under the sink or around the tap base.

• The dripping tap is part of a larger plumbing issue, such as low water pressure or noisy pipes.

• You are unsure how to safely turn off the water supply or perform repairs.

• The tap is old or damaged beyond simple repairs.

  
  

A professional plumber can diagnose the problem quickly and ensure repairs are done correctly to prevent further damage.

Why Fixing a Dripping Tap Matters

A dripping tap may seem minor, but it wastes water and money. According to the Environmental Protection Agency, a single dripping tap can waste over 3,000 gallons of water per year. That adds up to higher water bills and unnecessary strain on water resources.

Fixing the drip also prevents damage to your sink, countertop, and cabinetry caused by constant moisture. It keeps your home hygienic and reduces the risk of mold growth.

Tips to Prevent Future Drips

• Regular maintenance: Check taps periodically for leaks or wear.

• Use quality parts: When replacing washers or cartridges, choose durable, high-quality components.

• Avoid overtightening: Tighten taps gently to avoid damaging washers or seals.

• Install water softeners if you have hard water to reduce mineral buildup.

• Monitor water pressure and install a regulator if needed.

  
  

Taking these steps helps keep your bathroom and kitchen taps in good working order and reduces the chance of dripping.