Chemical Dosing Pot Maintenance Checklist
A maintenance checklist for chemical dosing pots covering valve operation, corrosion inhibitor dosing, system water testing, and dosing record-keeping for heating and cooling water circuits.
What is a dosing pot maintenance checklist?
A chemical dosing pot maintenance checklist is a structured list of the 8 preventive maintenance tasks — covering visual, functional, cleaning, safety and record-keeping checks — that keep a chemical dosing pot running safely and reliably. It groups routine checks by frequency, from daily inspections to annual servicing, so FM teams and building engineers can plan and evidence preventive maintenance.
Core dosing pot checks
- Inspect the dosing pot for corrosion, leaks, or damaged fittings
- Check dosing pot isolation valves are accessible and operate freely
- Clean the dosing pot internally if debris or residue has accumulated
- Check that the system is labelled as chemically treated
- Record chemicals added, volumes, and water test results
What is a chemical dosing pot?
A chemical dosing pot is a small vessel connected to a heating or cooling circuit that allows chemical water treatment products to be introduced into the system. Inhibitors protect against corrosion and scale, biocides prevent biological growth, and other chemicals maintain water quality. Correct use of the dosing pot and regular water testing are essential for system longevity and compliance with BSRIA water treatment guidelines.
This checklist is one of 25 in our plumbing and water system maintenance checklists, covering pressurisation units, booster sets, storage tanks, TMVs and water treatment — pressure, hygiene and legionella control.
Typical Dosing pot maintenance checklist
A practical starting point for planned preventive maintenance. Always refer to the manufacturer's O&M manual and site-specific requirements.
Visual Checks
- Inspect the dosing pot for corrosion, leaks, or damaged fittings
Functional Checks
- Check dosing pot isolation valves are accessible and operate freely
- Verify chemical inhibitor levels in the system water are within specification
- Top up chemical treatment via the dosing pot as required
- Test system water pH, TDS, inhibitor concentration, and appearance
Cleaning & Housekeeping
- Clean the dosing pot internally if debris or residue has accumulated
Safety Checks
- Check that the system is labelled as chemically treated
Record Keeping
- Record chemicals added, volumes, and water test results
Download the free Dosing pot maintenance checklist PDF
Get all 8 tasks as a printable PDF — free, no signup needed. Keep a copy in the plant room, attach it to work orders, or share it with your maintenance contractor.
Typical maintenance frequency
Suggested intervals for chemical dosing pot maintenance. Actual frequencies should follow manufacturer guidance and site-specific risk assessments.
Quarterly
- •Test system water quality
- •Check inhibitor concentration
- •Top up chemicals if needed
Annually
- •Full water treatment review
- •Inspect dosing pot condition
- •Comprehensive water analysis by specialist lab
Common faults and issues
Issues to be aware of when maintaining chemical dosing pot equipment.
Safety and compliance notes
Key safety considerations for chemical dosing pot maintenance. This is general guidance only — always follow OEM instructions, statutory requirements, and your organisation's safe systems of work.
Reference standards and frameworks
- United Kingdom
- HSE ACoP L8 and HSG274 for water hygiene
- North America
- ASHRAE Standard 188 (legionellosis risk management)
Frameworks commonly referenced when planning dosing pot maintenance programmes. Always confirm the requirements that apply to your site and jurisdiction.
Managing Dosing pot documentation with PM Assist
PM Assist helps FM and building operations teams search their O&M manuals and building drawings in seconds. Upload your chemical dosing pot documentation and ask questions like “What are the legionella control requirements?” or “When was the last water quality test?” — and get source-cited answers instantly.
See PM Assist answer questions about a real dosing pot manual — try the live demo, no signup needed.
Take this checklist with you
Download the branded PDF, generate a custom version for your asset, or run AI search across all your building documentation.
Related free tools
Related maintenance checklists
Inspection checklists for this asset
Maintenance keeps the asset working; a statutory inspection records whether it currently passes. Both usually apply.
Further reading on dosing pot maintenance
Compliance topics for dosing pot maintenance
Frequently asked questions
How do I use a dosing pot?
How do I check if the chemical inhibitor level is correct?
What chemicals does a heating system need?
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