Will it fit my radiator?
Create space in one radiator, dose the chemical, refit the plug and put the radiator back into service.
Just Dose It
Add system chemicals in around 20 seconds—without a full drain-down.
1
Fit
Into the radiator’s ½-inch tapping
2
Swivel
Turn the funnel upright
3
Dose
Pour and let gravity feed it in
THE PRACTICAL SHORTCUT
No filter dosing point? Use the radiator.
You do not need to drain and refill the whole system just to add a bottle of chemical. Isolate one radiator, remove a small amount of water, fit the funnel and dose through the top tapping.
More water to remove, more time to refill and vent, and more opportunity for mess.
A £14.99 tool that can earn its place on the first job.
One avoided full drain-down—or one less improvised setup—can save
more time than the tool costs.
READY-MADE FOR THE JOB
Stop making dosing tools
out
of bottles and hoses.
Stop making dosing tools out of bottles and hoses.
Some engineers build their own. Just Dose It gives you a compact, repeatable professional tool with the correct radiator connection already built in.
Durable, chemical-resistant construction made for repeated central-heating dosing.
Screws securely into the radiator’s top BSP tapping for a controlled dosing point.
Fit it at the available angle, then rotate the funnel upright ready to pour.
No parts to make up or lose—just keep it in the van for the next chemical dose.
ONE TOOL · MULTIPLE CHEMICALS
Use it for the treatments you fit
every week.
Use it for the treatments you fit every week.
Inhibitor
Protect the system after installation or service
Cleaner
Add sludge remover before a system clean
Leak sealer
Dose internal sealer through a radiator
Antifreeze
Add compatible protection where required
Always follow the chemical manufacturer’s instructions, quantities and PPE guidance.
SEE IT IN ACTION
From radiator
tapping to a clean
dose.
The official HeatLab demonstration shows the preparation, fitting and gravity-fed pour from start to finish.
HOW TO USE IT
Five clear steps.
No full drain-
down.
1
Switch off and cool the system
Close both radiator valves. Loosen a valve union and drain roughly 1–2 litres, then retighten.
2
Remove the top ½-inch plug
Use the radiator plug—not the small bleed vent—as the dosing point.
3
Fit the brass swivel
Screw it into the ½-inch BSP tapping. Hand-tight is normally sufficient.
4
Open the opposite bleed and pour
Open the bleed vent at the other end to let air escape, then add the correct amount of chemical and let gravity feed it in.
5
Refit, reopen and vent
Remove the tool, replace the plug, reopen both valves and vent the radiator.
Work safely.
confirm the system and radiator are off, cool and depressurised.
Wear suitable PPE and follow the chemical manufacturer’s instructions.
BUILT FOR THE TRADE
A professional answer to
an awkward job.
A professional answer to an awkward job.
Designed by HeatLab for installers who want a cleaner, repeatable way to add essential system chemicals—without bottles balanced over radiators or improvised hoses.
- Designed in the UK
- Reusable, chemical-resistant construction
- Lifetime manufacturing guarantee
