Swimming Pool Chlorine and pH Dosing Pump: Setup Guide
Manual chlorine dosing gives swings: too strong after dosing, too weak a few hours later. A dosing pump adds chemical steadily, so water stays safe and comfortable for swimmers. This guide is for hotels, clubs, housing societies and schools.
Planning dosing for your plant? Ask our engineers.
What a pool dosing system includes
- A hypochlorite dosing pump with its own chemical tank.
- A pH correction pump for acid (usually HCl or sulphuric acid) or soda ash solution.
- Injection points on the return line, after the filter and heater.
- Optional: a controller with chlorine and pH sensors that starts and stops the pumps.
Sizing the chlorine pump
Pool chlorine demand changes with bather load, sunlight and temperature. A practical starting point is to size the pump so it can replace your typical daily chlorine use in a few hours of running. Our dosing pump calculator converts ppm and water flow into litres per hour. Share your pool volume and turnover rate with us for a recommendation.
Materials
| Part | Chlorine pump | Acid pump |
|---|---|---|
| Pump head | PVDF or PP | PP or PVDF |
| Diaphragm | PTFE-faced | PTFE-faced |
| Valve balls | Ceramic or PTFE | Ceramic or PTFE |
| Tubing | PE or PVC | PE or PVC |
Avoid stainless steel for hypochlorite and HCl. Read more in our hypochlorite dosing pump guide.
Installation tips
- Inject chlorine and acid at separate points, at least a metre apart, never into the same fitting.
- Use an injection valve with a non-return check at each point.
- Keep the chemical tanks shaded and ventilated.
- Interlock the pumps with the circulation pump so they stop when water is not flowing.
Related
Frequently asked questions
Can one pump dose both chlorine and acid?
No. Mixing hypochlorite and acid releases chlorine gas. Always use separate pumps, tanks and injection points.
Do I need an automatic controller?
It is not essential, but a controller with sensors keeps chlorine and pH steady with less manual testing, especially in busy pools.
Do you supply pool dosing pumps outside Mumbai?
Yes, we deliver across India. See our page for RO, pool and farm dosing pumps.
Get dosing pumps sized for your plant.
Jagdish Engineering Works, Mumbai – manufacturer of plunger and diaphragm metering pumps and pressure relief valves since 1969. Our engineers design, test and repair dosing pumps for water treatment, chemical, refinery, fertilizer, sugar and paper plants.
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