How hard water affects pipes and septic tanks in the Marina Alta region

Main effects of hard water on pipes

Limescale build-up and pressure loss

Over time, calcium carbonate builds up inside pipes, reducing their effective diameter. This leads to:

• Decreased pressure in taps, showers and appliances,

• Increased risk of traffic jams on narrow or old sections of road,

• Higher energy consumption in water heaters, pumps and boilers.

Premature corrosion and leaks

Solid build-up can create internal microcracks, accelerating corrosion and reducing the strength of copper or iron pipes. This can lead to breakages, damp or hidden leaks in coastal developments.

In this situation, it may be necessary to call in the specialist drain unblocking and pipe cleaning services available from Limpiezas Domingo.

Consequences of hard water in septic tanks

Biological imbalance of the system

Septic tanks work thanks to bacteria that break down organic waste. Hard water, combined with aggressive products, can inhibit their action, causing:

• Excessive accumulation of solids,

• Persistent unpleasant odours,

• More frequent and costly voids.

Mineral crusts and obstruction

Lime can also build up in filters and on the walls of the pit, reducing its capacity and blocking ventilation or outlets. This requires logical and technical intervention, not just superficial emptying.

For these processes, Limpiezas Domingo offers a septic tank emptying service, with specialised technical cleaning.

Municipalities most affected in the Marina Alta region

The towns with the hardest water in the Marina Alta are:

• Dénia

• Xàbia (Jávea)

• Calp

• Teulada‑Moraira

• Benissa

• Ondara

• Pedreguer

In these locations, problems such as pressure loss, scaling, or imbalances in septic tanks require regular maintenance and professional attention.

Recommended solutions to protect your facilities

Installation of water softeners

A water softener installed at the main water inlet (home or community) removes harmful minerals, extending the useful life of pipes and preventing deposits in equipment and tanks.

Use of compatible products

Only use cleaners labelled as safe for septic systems, free of chlorine, phosphates or aggressive anti-lime products, which can damage essential bacterial flora.

Regular maintenance

• Apply biological treatments on a monthly basis.

• Check the installation if you notice odours or slow flow.

• Schedule professional drain cleaning every 6 to 12 months depending on usage and water hardness.

You can find out more about our maintenance contracts at Limpiezas Domingo to ensure that your system is properly serviced.

Case study in Dénia: comprehensive solution to limescale

A community of chalets in Dénia was suffering from low pressure and blockages. Upon inspection, an accumulation of more than 3 mm of lime was discovered in the main pipes and mineral deposits in the tank. The following solutions were applied:

1. Installation of a communal water softener.

2. Mechanical cleaning with high-pressure rotary equipment.

3. Emptying and technical treatment of the pit with a tanker truck.

Result: pressure restored, more efficient system and a 40% reduction in emergency interventions.

Frequently asked questions about hard water and septic tanks

• Does hard water damage septic tanks?
  Yes. It alters bacterial diversity and generates mineral deposits that reduce its performance.

• How often should the tank be emptied in areas with hard water?
  Ideally every 6 to 12 months, depending on the use of the property and the local water hardness.

• What products can I use at home with a septic tank?
  Biodegradable products without chlorine or phosphates, labelled ‘safe for septic tanks’.

• How can I tell if my area has hard water?
  If you notice white residue on taps, heaters or the boiler heating element, it is advisable to carry out a chemical analysis.

Do you live in Marina Alta and suffer from low pressure, blockages or problems with your septic tank?
At Limpiezas Domingo, we provide:

• Professional drain unblocking and pipe cleaning service.

• Emptying and technical cleaning of septic tanks,

• Inspection, maintenance, and prevention of hard water effects.

Request a no-obligation review now and protect your facilities.