✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
Description
Two-Dial Manual Control Chlorine Metering Pump With LMI's AutoPrime Auto-Degassing Liquid End
The LMI C HI Series Chlorine Metering Pump uses an AutoPrime auto-degassing liquid end to handle off-gassing chlorine without air-locking. Two dials independently control stroke length and speed. Three variants — 2.3, 3.8, and 7.8 GPH cover most water treatment dosing applications. NSF and cUL approved.
Key Features of the LMI Two Dial C HI Series Chlorine Metering Pump
- AutoPrime auto-degassing liquid end: LMI's de-gassing head design uses three check valves and a continuous bleed that returns gas and a small portion of chemical to the supply tank, eliminating the air-binding that off-gassing chlorine causes in standard pump heads.
- Two-dial manual control: stroke length and stroke frequency (speed, up to 240 strokes per minute) adjust independently from readily accessible dial knobs, letting operators fine-tune dosing rate without changing tooling or stopping the pump.
- Transparent acrylic pump head: see-through Acrylic/PVC head lets operators verify chemical flow and Liquifram diaphragm operation visually, cutting troubleshooting time on suspect priming issues.
- Complete installation kit included: ships with injection valve, suction valve, foot valve with integrated strainer, 4-function discharge valve, and 16 feet (4.8 m) of polyethylene tubing.
- Chlorine-compatible wet end materials: Acrylic/PVC head, ceramic ball checks, Fluorofilm Liquifram diaphragm, Polyprel® seals rated for 12.5% sodium hypochlorite. Confirm compatibility with our team for other chemistries.
- NSF and cUL approved: certified for use in drinking water treatment applications. Suction lift up to 5 feet or a flooded suction installation is supported.
Specifications
| Specification | C111-D60HI (2.3 GPH) | C121-D60HI (3.8 GPH) | C131-D10HI (7.8 GPH) |
|---|---|---|---|
| Max Flow Rate | 2.3 GPH / 55.2 GPD | 3.8 GPH / 91.2 GPD | 7.8 GPH / 187.2 GPD |
| Max Pressure | 150 PSI | 100 PSI | 60 PSI |
| Tubing Size | 3/8" OD | 3/8" OD | 1/2" OD |
| Liquid End | AutoPrime D60HI | AutoPrime D60HI | AutoPrime D10HI |
| Control Type | Dual manual (stroke + speed) | Dual manual (stroke + speed) | Dual manual (stroke + speed) |
| Max Stroke Frequency | 240 strokes/min | 240 strokes/min | 240 strokes/min |
| Suction Lift | Up to 5 ft | Up to 5 ft | Up to 5 ft |
| Max Viscosity | 200 cP | 200 cP | 200 cP |
| Voltage | 115 VAC, 50/60 Hz | 115 VAC, 50/60 Hz | 115 VAC, 50/60 Hz |
| Head Material | Acrylic / PVC | Acrylic / PVC | Acrylic / PVC |
| Ball Check | Ceramic | Ceramic | Ceramic |
| Diaphragm | Fluorofilm Liquifram | Fluorofilm Liquifram | Fluorofilm Liquifram |
| Seals | Polyprel® | Polyprel® | Polyprel® |
| Certifications | NSF, cUL | NSF, cUL | NSF, cUL |
Applications
Specifiers and operators deploy the C HI Series for off-gassing chlorine and similar chemistries in:
- Municipal drinking water disinfection (12.5% sodium hypochlorite feed at well sites, booster stations, and treatment plants)
- Wastewater chlorination and dechlorination at small to mid-size treatment facilities
- Cooling tower water treatment (biocide and oxidizer feed where air-binding has historically been a problem)
- Small community drinking water systems serving rural municipalities and developments
- Food and beverage process water sanitation
- Industrial cooling water with continuous hypochlorite dosing
- Pulp and paper mill water treatment chemical feed
Certifications
- NSF certified — for use in potable (drinking) water treatment applications
- cUL listed — UL safety standard for Canada and the USA
- Electrical: 115 VAC, 50/60 Hz (compatible with standard North American power)
Why Choose This Pump?
Cleanflow stocks the LMI C HI Series chlorine metering pump in Canada with free shipping over $199 CAD from our Winnipeg warehouse. The C HI Series solves the air-binding problem that off-gassing chlorine causes on standard pump heads, with NSF and cUL certifications that municipal buyers require.
Order LMI C HI Series Chlorine Metering Pump Online from Cleanflow
Select your flow rate variant 2.3, 3.8, or 7.8 GPH and add to cart. Cleanflow is an authorized supplier of LMI metering pumps and replacement parts across Canada and the USA, with free shipping on orders over $199 CAD.
Browse the full LMI metering pump catalog or LMI chlorine pump liquid end replacement kits at Cleanflow.
Frequently Asked Questions
What does "HI" mean in the LMI C HI Series model number?
HI refers to LMI's AutoPrime de-gassing liquid end variant. AutoPrime liquid ends have three check valves: suction (bottom), discharge (front), and an AutoPrime bleed (top) that continuously returns a small portion of chemical and any off-gas to the supply tank. This design eliminates the air-binding that off-gassing chlorine causes on standard pump heads.
Which flow rate variant do I need?
Match the pump's maximum flow rate (GPH) to your dosing demand and operating pressure:
- C111-D60HI — 2.3 GPH at 150 PSI. Best for higher-pressure chlorine injection applications.
- C121-D60HI — 3.8 GPH at 100 PSI. Common choice for mid-range municipal dosing systems.
- C131-D10HI — 7.8 GPH at 60 PSI. Designed for higher-volume, lower-pressure chemical feed.
Most municipal sodium hypochlorite systems typically use the C111 or C121 variants.
Is this pump compatible with 12.5% sodium hypochlorite?
Yes. The chlorine wet end configuration uses Acrylic/PVC head, ceramic ball checks, Fluorofilm Liquifram diaphragm, and Polyprel® seals rated for 12.5% sodium hypochlorite, the standard municipal chlorination chemistry. For calcium hypochlorite, peracetic acid, or other oxidizers, confirm compatibility with our team before ordering.
What's included in the box?
Every C HI Series pump ships with a complete installation kit: injection valve, suction valve, foot valve with integrated strainer, 4-function discharge valve (anti-syphon, pressure relief, line drain, priming aid), and 16 feet of polyethylene tubing in the appropriate OD for the variant ordered.
How is this different from the LMI C9 4-20mA Electronic pump?
The C HI Series uses dual manual control dials operators adjust stroke length and speed by hand. The C9 4-20mA Electronic pump accepts a remote 4-20mA signal for SCADA or PLC integration, with a digital keypad and LCD display. Choose the C HI Series for manual dosing where remote control isn't required.
Can I install this pump myself?
Yes, with basic plumbing experience. Mount the pump above the chemical reservoir (or below for flooded suction). Connect suction tubing to the foot valve, discharge tubing to the 4-function valve, and route discharge to the injection point. Prime per the LMI manual. The AutoPrime liquid end self-bleeds. No manual priming needed after initial setup.
How often does the liquid end need service?
LMI recommends annual inspection of elastomeric components. Replace the liquid end kit when you see persistent priming issues, dosing inconsistency, or visible diaphragm wear. Cleanflow stocks LMI chlorine metering pump liquid end replacement kits, the same OEM parts the C HI Series ships with for fast field service.
Does this pump come with a warranty?
Yes, LMI provides its standard manufacturer's warranty on the pump and drive. Cleanflow adds a 30-day return window on top of LMI's warranty. Keep the original box and packaging for any warranty service request.
✅ This item is normally regularly stocked. Shipping times may vary depending on availability. Please contact us to confirm stock and shipping times. You will receive tracking details once the item has shipped.
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