The plumbing industry in France is a sector largely dominated by small business owners. Of the 14 billion euros in annual revenue projected for 2025, the vast majority is generated by 15,000 SMEs (small and medium-sized enterprises). The volume of work continues to rise thanks to the expansion of the MaPrimRénov’ subsidy program and the ban on gas-fired boilers that took effect in 2022 (Business Plan Templates). Short training programs, an attractive industry… discover everything you need to know to start your career change and become a plumber.
The plumber works on all types of projects, from new construction to renovation. He doesn’t just install pipes. They analyze blueprints and perform rigorous calculations to ensure a functional and safe plumbing system. Their responsibilities can be summarized by the following three key points.
Before getting to work on the construction site, the plumber carefully studies the architect’s blueprints to determine the route of the pipes. This preparatory work is essential for safety of the job, especially if it is being performed near the electrical system or air distribution system (CIDJ).
It calculates the pressure and the volumetric flow rate for each of its systems, in liters per second or cubic meters per hour (Yellow Pages). Calculating the flow rate and pressure allows you to determine the appropriate pipe diameter and ensure sufficient flow for thehousehold appliance or plumbing fixture. Thus, according to the Unified Technical Document (DTU), the flow rate for a hand-washing basin (0.1 L/s) is not the same as that for a bathtub (0.33 L/s).
After preparing his plans, the plumber goes to the job site based on the updates made to the construction schedule. Inside the building, he marks the locations and drills holes in the walls or floors to install the piping. The piping consists of pipes welded together, with dimensions determined by the calculations mentioned above.
Once the pipes are installed, he checks key parameters, such as their watertightness and insulation. If the plumbing system shows no defects, he fills in the holes and installs the plumbing fixtures (bathtub, sink, etc.) and appliances (washing machine, dishwasher). He handles both their faucets as well as their electrical connections.
If he works as a plumber and heating technician, this construction professional also installs equipment to regulate the temperature of the home. Radiators, furnaces, air conditioning and ventilation systems—all these devices have in common that they operate using fluids. In addition to construction, plumbers are tradespeople who make a significant contribution to energy-efficient renovation.
Once the facility is up and running, he regularly visits his customers to perform maintenance or repair defective equipment. His PPE (Personal Protective Equipment) must be in perfect condition to protect him from toxic substances (Official Prevention):
A plumber can assist with installing flooring in wet areas or with home automation systems for connected devices. In these cases, they work in close collaboration with the tiler and the electrician (Manpower).
Like other construction trades, plumbing is a profession that requires only a few years of training and offers many job opportunities. According to a survey by France Travail, 20,000 positions for plumbers and heating engineers were expected to be available in 2024 (I’m Changing Careers). Due to the shortage of skilled workers, this shortage remains an issue in 2025, on par with that for masons or carpenters.
Unlike the landscape architect or the roofer, plumbers work primarily inside the home. Theimpact of the weather on construction sites does not directly affect them. For a site manager, this makes it easier to manage the schedule. Furthermore, plumbers work in various types of buildings : residential, industrial, commercial, agricultural, and service sector buildings.
Working conditions are recognized as very difficult. Whether it involves emergency repairs or repair work, plumbers must be on call 24 hours a day, including weekends and holidays. The Plumbing fixtures, household appliances, and climate control equipment are very heavy to carry. The risk of injury is particularly high in the event of a fall or an improper maneuver.
Pipes are located in tight spaces, which are prone to odors and unpleasant buildup. Most of the old pipes contain carcinogenic materials found in construction dust such as lead, silica, or asbestos. Furthermore, near a boiler or a water heater, you must be careful of extreme temperatures that can cause burns.
Plumbers have in-depth knowledge of fluid flow and the materials used for pipes (copper, stainless steel, steel, etc.). They are skilled in various preparation and assembly techniques, from marking out to bending and welding.
With regard to security, he holds a PGN certification (Natural Gas Professional) and PGP (Propane Gas Professional) certifications. His knowledge of electricity and masonry is very useful in meeting the requirements of his client. More than just a contractor, the plumber also acts as an advisor to optimize the plumbing layout. Finally, good level of physical fitness is essential for working in uncomfortable positions or carrying heavy loads.
Training programs for becoming a plumber are among the shortest in the construction industry. The CAP in Plumbing Installation is the first certification, which can be earned in two years—or in just a few months for those changing careers. This program validates fundamental skills, such as connecting pipes and performing repairs.
Once they have earned their CAP, apprentice plumbers can specialize in sheet metal work or the maintenance of individual heating systems. If they choose to continue their studies for up to 3 years after earning the CAP, they can earn one of the following diplomas (Onisep):
Due to the risks on the job site, certain certifications are required to perform certain plumbing tasks. For example, the PGN (Natural Gas Professional) and PGP (Propane Gas Professional) certifications are required only for work on gas systems. However, a plumber may work without these certifications if they do not work on this specific equipment. An adult seeking a career change can complete the CAP-level training in a few months or one year instead of the required two years (Legalstart).
After a few years of experience, a seasoned plumber can apply for a position as a site manager or construction supervisor. A salaried plumber has the option of going into business for themselves, especially since professionals with dual training are in high demand and highly valued.
In 2025, Batiactu estimates the average gross annual salary of a plumber over the course of a year. This compensation depends on the geographic region, level of experience, and the professional’s status (employee or self-employed). After 10 years of experience, a salaried plumber can earn up to €30,479 in gross annual salary, or €1,838 in net monthly pay. If they are versatile and work in an area with plenty of job opportunities, the self-employed plumber can earn up to €5,000 net per month (Indeed). This level is achieved through extensive overtime (both on-site work and administrative tasks) and lucrative opportunities.
As an essential trade in the construction industry, plumbing offers numerous opportunities for both employment and self-employment. Working conditions are demanding, and safety measures are strictly enforced. However, the demand for qualified plumbers continues to grow, thanks to energy-efficient renovations and the rise of new technologies (smart plumbing). To succeed on the many job sites that await you, subscribe today to Techtime, your construction site management software.
