Introduction to common plumbing problems

A home's plumbing network is a "living organism" that operates under constant pressure 24 hours a day. Despite the durability of modern materials (multi-layer pipes, copper, PP-R), daily use, mineral deposits (limescale), and pressure fluctuations from the central water supply network of EYDAP or local municipalities inevitably lead to wear and tear. For a homeowner, understanding the symptoms of a failure can save thousands of euros in future damage to masonry or water waste.

Low water pressure: Why has the flow decreased?

Low pressure is perhaps the most common complaint, especially in older apartments or houses located at higher elevations in the area. Before calling a plumber, check if the problem is limited to a single faucet or if it affects the whole house.

Common causes of low pressure

  • Clogged aerators: Limescale and sand grains accumulate at the tips of faucets. Unscrew them and clean them with vinegar.
  • Clogged pressure regulator: If you have installed a pressure regulator after the meter, its internal filter may be saturated with sediment.
  • Leak in the basement or pilotis: A large, hidden leak "steals" pressure from the house's consumption.
  • Aged iron pipe network: In homes over 40 years old, galvanized pipes suffer from internal oxidation and deposits, reducing their cross-section to the point where water barely flows.

Noises in the piping and "Water Hammer"

Noises in the plumbing network are not just annoying; they are a warning of an imminent pipe or fitting rupture. The most dangerous noise is a dry metallic bang that occurs when you abruptly close a faucet or when the washing machine stops.

What is water hammer?

Water hammer occurs when the momentum of water is interrupted suddenly. This energy is converted into a shock wave that causes the pipes to vibrate. If pipes are not properly supported with pipe clamps, they strike against structural elements.

Whistling or humming

If you hear a constant whistling, a faulty check valve or a pressure regulator that has lost its calibration is often to blame. Also, very high pressure (above 5-6 bar) forces water to move at excessive speeds, causing friction and noise.

Leaks: The "silent enemy" of building materials

Leaks are divided into visible ones (dripping faucet, running toilet) and hidden ones. Hidden leaks are the most dangerous because they are revealed only when moisture, mold, or peeling paint appears.

  • Leaking toilet: It can cost over 100-200 euros per year in wasted water consumption.
  • Leaking flex hoses: The flexible hoses under sinks have an expiration date. A small hole can flood the house in a few hours.
  • Water heater leak: Dripping from the safety valve is often an indication of excessive pressure or a failure of the valve itself.

How to protect your installation

Prevention is always cheaper than restoration. As a technician, I suggest that owners follow some basic maintenance rules:

  1. Install a central filter: A sediment filter (thread or mesh) after the meter keeps sand and dirt away from faucets and electrical appliances.
  2. Install a pressure regulator: Set the house pressure to 3.5 to 4 bar. It is the ideal value for comfort and protection.
  3. Check the meter: Once a month, turn off all faucets and see if the meter is still turning. If it is, you have a hidden leak.
  4. Change the safety valve: On the water heater, the valve should be checked or changed every 2-3 years, especially in areas with hard water.

Frequently Asked Questions (FAQ)

1. Why does the water in the shower come out intermittently?

This is often due to partial blockage of the shower hose due to limescale or a problem with the thermostatic mixer (if present). Also, if you have an instant water heater, the flow may be too low for it to activate.

2. What does it mean when the hot water pressure is lower than the cold water?

It is an indication that the water heater or gas boiler has accumulated limescale at the water inlet or outlet, or that the coil (heat exchanger) is clogged. Less frequently, the water heater's check valve is at fault.

3. How do I stop water hammer?

Installing a small expansion vessel (shock absorber) or a pressure regulator usually solves the problem. Also, replacing old valves with slow-closing valves helps significantly.

4. Is it normal for the water heater safety valve to drip?

It is normal for it to drip slightly during water heating due to expansion. However, if it drips constantly, then either the network pressure is too high, or the valve has failed.

Conclusion

Plumbing failures should never be ignored. A slight drop in pressure or an unusual noise is the network's message that something is wrong. Proper pressure adjustment and regular inspection of filters and valves are the best tools for a long-term and trouble-free installation, while ensuring the economy and safety of your home.