Pressurisation Unit Servicing London

What a pressurisation unit service covers

We verify the cold fill pressure against the system static height, confirm the low and high alarm set points are sensible for that fill pressure, and function test both alarms rather than assuming they work. Each pump is run and its operation proven, twin units are changed over, the break tank float valve and level switch are tested, and the strainer and non-return valves are checked. Every reading goes on the record so next year's figures can be compared against this year's.

• Cold fill pressure checked against static height
• Alarm set points verified and function tested
• Pumps run individually, changeover proven on twin units
• Break tank float valve and level switch tested
• Strainers and non-return valves inspected
• All readings recorded for year-on-year comparison

Make-up volume: the most useful number in the plant room

A pressurisation unit with a water meter on the make-up tells you more about system health than almost anything else. A system that needs a few litres a year is sound. One taking hundreds of litres has a leak or a discharging safety valve, and every litre brings oxygen and hardness that will corrode the system from the inside. We record make-up volume at each visit and flag rising consumption before it damages boilers, pumps and heat exchangers.

• Make-up volume logged at every visit
• Rising consumption flagged and investigated
• Safety valve discharge checked as a cause
• Water treatment advice where dilution is occurring

Vessels, treatment and the wider system

Pressurisation servicing is most valuable done alongside expansion vessel testing and a system water quality check, because the three are interdependent. A waterlogged vessel makes a healthy unit look faulty. Continuous dilution from make-up destroys inhibitor levels and lets corrosion begin. We can test vessel pre-charge and take a system water sample at the same visit so you get a single, coherent picture of the plant rather than three separate opinions.

Contracts and reporting

For managed portfolios we offer planned maintenance contracts covering pressurisation units, expansion vessels, booster sets and plant room pumps on one schedule, with an asset register, fixed visit pricing and priority response between visits. Reports are photographed and dated, list defects with priced remedial options, and are written so a non-technical manager can act on them without needing to interpret plant room jargon.

• Combined plant room PPM schedules
• Asset register maintained per site
• Photographed reports with priced recommendations
• Priority response between planned visits