This translation is provided for convenience; the French version prevails.
Legal notice
CBELIER — calculation of transient flows (water hammer) in pressurised water networks.
Service publisher
- Company name: ALFA WAMANE SARL AU
- Legal form: single-shareholder limited liability company (SARL AU, Moroccan law)
- Registered office: Imm. n° 5, rue Dakar, bureau n° 1, Océan, Rabat, Morocco
- Trade register (RC): 169351
- Common company identifier (ICE): 003311083000033
- Tax identifier (IF): 53830992
- Activity: consulting engineers
- Publication director: the manager of ALFA WAMANE
- Contact: alfawamane@gmail.com
The corporate website of ALFA WAMANE is www.alfawamane.ma.
Hosting
- Application and calculation server: Railway Corporation (railway.com), 548 Market St, Suite 68956, San Francisco, CA 94104, United States. The CBELIER server runs in a data centre located in Amsterdam (Netherlands).
- Accounts, credits and logs: Supabase database (supabase.com), hosted in the European Union (Paris, France).
Intellectual property
CBELIER, its calculation engine, its interface, its symbols, its logo, its user guide, its user manual and its examples are the exclusive property of ALFA WAMANE. The calculation engine runs on the server and is never sent to the browser.
Without the prior written authorisation of ALFA WAMANE, the following are prohibited: reproducing, distributing or reselling all or part of the software and its documentation, decompiling or reverse-engineering it, extracting the engine or its intermediate results, circumventing the credit count, and automated access to the server other than with an API key supplied by ALFA WAMANE.
Your projects, your input data, the technical reports produced for your studies and your office’s logo remain your property.
Sale of the CBELIER books
The e-books « CBELIER — Fondements, vérification et validation d'un logiciel de calcul des régimes transitoires » [CBELIER — Foundations, verification and validation of a transient-flow calculation software] (book 1) and « CBELIER — Fondements scientifiques du calcul des régimes transitoires. Équations, méthodes numériques et organigrammes » [CBELIER — Scientific foundations of transient-flow calculation. Equations, numerical methods and flowcharts] (book 2), written in French, are sold online by ALFA WAMANE SARL AU under the terms of sale; their use is governed by the licence of each book (book 1, book 2). They are also offered on Payhip (payhip.com), under the conditions of that platform.
Responsibility for results
CBELIER is a design aid. Its results depend directly on the data entered (geometry, materials and wave speeds, characteristics of the pumps and protection devices, operating laws, initial conditions) and on the assumptions of the models described in Help › Method and validation and in the user manual.
- The results must be examined and validated by a qualified engineer before any design, purchasing or operating decision. They replace neither the engineer’s judgement, nor standards, nor the requirements of manufacturers and of the project owner.
- The engine’s automatic checks (plausibility, vapour pressure, convergence) reduce the risk of error without removing it.
- ALFA WAMANE cannot be held liable for the consequences of a data-entry error, of use outside the documented range of validity, or of use of the results without verification.
- The service is available online with no guarantee of continuous availability. A calculation that does not complete uses no credit.
Last updated: 19 October 2026.