CHLORINATION COMMISSIONING
Approved Water Chlorination and Commissioning Engineer based in Yorkshire
Certification for both Hot and Cold Water
Energy & Utility Skills Register (EUSR): 538254






YORKSHIRE-BASED MAINS CHLORINATION
Chlorination for All New Mains
Before you connect
All new mains water supplies must be chlorinated before being connected by a Water Utility company such as Yorkshire Water or United Utilities.
Getting your certification
Without a chlorination certificate and approval from an independent UKAS microbiological analysis, Water Utility companies can refuse to connect a new mains pipe onto its system until the new pipe work has been chlorinated.
How we can help
We provide a full chlorination and pressure testing service for all new mains connections, irrespective of size. We are registered “Approved” by the Energy & Utility Skills Sector Group.
Pressure Testing
Checking for leaks
Before connecting a new water main, you are required to provide proof that your new main does not leak. Water Utility companies have strict guidelines and procedures for pressure testing.
Pressure testing requires specialist expertise as well as satisfactory evidence including full data logging and graphical analysis. We provide a full pressure testing service for all new mains connections.
Choosing the right contractor
It’s important to choose an experienced and qualified contractor or you could risk procedure failure and delay your connection date.
Make sure to identify exactly which engineer will be completing the work and request certification and evidence for that specific engineer.
Example 1: cancelled connection date
Mains Chlorination Ltd took on a project where the previous contractor had failed to complete the works correctly. As a result, the connection date was cancelled and the venue was forced to cancel a wedding (the first event following the handover of the building by the main contractor). This was a decision of poor procurement and resulted in a substantial insurance claim.
Example 2: the cost of poor workmanship
Mains Chlorination Ltd was appointed to a contractor in West Yorkshire. A few weeks prior the chlorination works had been completed by a different water hygiene company. Following this work, the client began receiving water heater failures within the building. The number of failures began increasing as the days went on, which triggered an investigation. The investigation confirmed severe corrosion damage and pitting to the individual units themselves along with a strong aroma of chlorine once the units had been removed and inspected.
The outcome was proved to be due to poor workmanship by the original water hygiene contractor. The case was taken to court and the client was eventually awarded a claim in excess of twenty thousand pounds for the damages caused plus legal fees.
The lesson here is: you must ask the question “who is doing the actual work?” A website and company can demonstrate a world of expertise, however, if an inexperienced technician is appointed with little guidance and training to undertake the chlorination works the results can be costly.
Chlorination Certificate
Chlorination Commissioning offers complete Main Chlorination services across the UK. Chlorination Certificates are issued on the same day as the Mains Chlorination work.
Pressure Testing Analysis
Type 1 Test
The test involves measuring the volumes of water lost during a test period. Suited to ridged pipe material such as:
- ductile iron
- stainless steel
- glass-reinforced plastic
- Materials that do not exhibit creep damage
Type 2 Test
This test involves pressure testing for:
- Polyethylene pipelines
There are hydro-statically pressure tested to test for leaks. This requires specialist analysis due to ‘creep’ values and not water loss.
Mains Chlorination Ltd is experienced and approved by the Energy & Utility Skills Sector Group for the assessment of PE materials and deliver certification and analysis reports that comply with the latest versions of industry guidance notes.
10 Minute Test
This test is suitable for testing polyethylene pipes often laid with the pipe-busting technique where water supply needs to be reconnected as quickly as possible.
Rather than measuring the pressure loss within the pipeline over a minimum of one hour, the 10 Minute Test maintains the pressure for a ten minute duration. The amount of water added is recorded to indicate the pressure changes within the pipeline. The joints must also be visually inspected for leakage during the ten minute test period.






