High-performance central heating inhibitor that protects against scale, rust, corrosion, hydrogen gassing and boiler noise. Suitable for all indirect systems including aluminium-based. Colourless, non-toxic formula. One litre treats a typical domestic system with up to 10 radiators.
The Bondit PC100 is a heating system inhibitor designed to protect central heating systems from the inside out. Scale build-up, corrosion, rust, hydrogen gassing, microbiological growth and boiler noise are all common problems in systems that run without chemical protection. PC100 tackles all of them in a single treatment, keeping the system clean and running efficiently for years.
It works in all types of indirect heating systems, including those with aluminium components, which rules out a fair few products on the market. The formulation is colourless, so there is no staining risk to system components or pipework, and it is non-toxic and environmentally safe to handle.
Where Bondit PC100 Fits Into a Heating System Service
For plumbers and heating engineers, this is the kind of product that earns its place on the van. One litre is enough for a typical domestic system running a 14.5kW boiler, a hot water cylinder and up to 10 radiators. Add a second bottle for anything larger. Overdosing is not a problem, which removes one concern during installation.
Once dosed, the inhibitor does not need to be replaced unless the system is fully drained. It complies with current EU inspection standards and includes a peel-off label to date the treatment, which is useful for records and sign-off paperwork. Small detail, but worth having when a Gas Safe engineer is on site.
PC100 also helps prevent pin-holing in radiators and reduces the boiler noise that homeowners tend to report when systems start to fur up. Catching these issues early extends the life of the whole system, which is easier to explain to a customer than why their boiler needs replacing after five years.
Pro Tip: If you are dosing a sealed system via a drained radiator, make sure the radiator you choose is on the ground floor so the inhibitor enters the main circulatory loop rather than sitting in a branch.
PC100 is used by plumbers and heating engineers during new system installations, after a system flush, or as part of an annual boiler service. It is suitable for sealed and open-vented indirect central heating systems, including those with aluminium heat exchangers or radiators. It is commonly used in domestic properties, small commercial premises and anywhere running a standard wet central heating circuit.
Best For
New system commissioning
Post-flush dosing
Annual boiler service protection
Preventing radiator pin-holing
Reducing boiler noise
Compatible Systems
All indirect central heating systems
Aluminium-based systems
Sealed systems
Open-vented systems
Systems with hot water cylinders
Key Properties
Protects against scale, rust and corrosion
Prevents hydrogen gassing
Inhibits microbiological growth
Colourless, non-staining formula
Non-toxic and environmentally safe
Complies with EU inspection standards
Includes dated peel-off label
Not suitable for: Not suitable for direct hot water systems or potable water circuits. This product is for indirect heating systems only.
Dose at 1% of total system volume, meaning 1 litre per 100 litres of system water. For open systems, add via the filling and expansion tank. If the system is already full, drain from a low point first to ensure the product circulates properly. For sealed systems, dose through the filling loop or via a drained radiator.
Once added, run the system up to temperature and check for normal circulation. The inhibitor does not need to be topped up unless the system is drained down. Use the included peel-off label to record the date of treatment on the system.
Calculate the total water volume of the heating system to determine the correct dose
For open systems, add PC100 directly to the filling and expansion tank
If the open system is already full, drain water from a low point before dosing to allow the product to enter the circulatory loop
For sealed systems, dose through the filling loop or remove a ground-floor radiator and add via the valve
Refill and repressurise the system as required
Run the system up to normal operating temperature to ensure the inhibitor circulates fully
Attach the peel-off label to the boiler or system documentation to record the date of treatment
How much PC100 do I need for a standard domestic system?
One litre is sufficient for a typical domestic system with a 14.5kW boiler, a hot water cylinder and up to 10 radiators. For larger systems, use an additional bottle. Overdosing will not cause any harm to the system or its components.
Does PC100 need to be replaced every year?
No. Once PC100 is added to a system it provides ongoing protection and does not need to be replaced unless the system is fully drained down. After a drain and refill, a fresh dose should be added to restore protection.
PC100 is a multi-functional liquid inhibitor formulated to prevent scale, corrosion, rust, hydrogen gassing and microbiological growth in indirect wet central heating systems. The colourless, non-toxic formula is compatible with all common system materials including aluminium. It meets current EU inspection standards and includes a dated application label for record-keeping purposes.
Product Code
PC100
Volume
1 litre
Dosage Rate
1% of system volume (1L per 100L)
Colour
Colourless
Toxicity
Non-toxic
System Compatibility
All indirect systems including aluminium-based
Replacement Required
Only if system is drained down
Standards
Complies with EU inspection standards
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