Chemical feed stations — also called chemical dosing systems or chemical injection systems — deliver precise amounts of chemicals into water, wastewater, and industrial process lines. Our NSF-approved polyethylene chemical feed stations with built-in secondary containment arrive at your facility compact, fully assembled, and ready to use. No more handling costs, drum disposal headaches, or guesswork.
Whether you need a simple gravity-fed tank with a metering pump or a fully custom skid-mounted dosing system, we engineer solutions sized from 35 to 550 gallons that are lightweight, durable, and built to meet ASTM D-1998, FDA, and ANSI/NSF 61 standards.
What Are Chemical Feed Stations Used For?
Chemical feed stations accurately and reliably inject chemicals into a process stream. Common applications include:
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Water treatment — dosing chlorine, fluoride, or other disinfectants to ensure safe drinking water
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pH adjustment — adding acids or bases to maintain target pH levels in process fluids
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Corrosion and scale control — injecting inhibitors to protect piping and equipment
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Coagulation and flocculation — metering chemicals that aid in solids removal
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Wastewater treatment — adding reagents to neutralize contaminants before discharge
Because these applications demand accuracy and reliability, every system we build is pre-plumbed, tested, and programmed before it ships — so you can get up and running fast.
Self-Contained Tanks with Secondary Containment
Every chemical feed station starts with a rotationally molded polyethylene primary tank seated inside a containment basin rated to hold a minimum of 110% of the primary tank’s volume. Key features include:
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Semi-translucent primary tanks for quick visual level checks
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Easy-to-read molded volume markers
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16″ threaded lid with removable 6″ air breather; open-top and hinged lids also available
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Uniform wall thickness from air-cooled rotational molding — less wall stress, better structural integrity, and longer service life
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Optional polyethylene pump shelves and stackable tank stands for gravity-feed configurations
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Vented or fume-tight lid options to match your chemical environment
These self-contained units are lightweight and easy to handle, making installation straightforward even in tight mechanical rooms or remote field locations.
Custom Fully Assembled Chemical Dosing Systems
Need more than a tank and basin? We build turnkey, skid-mounted chemical dosing systems tailored to your exact process requirements. Custom systems can include any combination of:
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Diaphragm or peristaltic dosing/metering pumps (primary and redundant)
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Mixers or agitators
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Level sensors with control outputs for continuous chemical feed
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Overflow and low-volume alarms
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Leak detection systems
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pH and ORP sensors
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Remote monitoring and telemetry
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Immersion heaters or heat trace for temperature-sensitive chemicals
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Custom piping, fittings, and instrumentation specified for your chemical and operating environment
Every component is selected for chemical compatibility, installed on the skid, and tested before delivery — a true plug-and-play solution.
Assmann Polyethylene Chemical Feed Stations
We partner with Assmann Corporation to offer a full line of rotationally molded chemical feed stations built from high-density crosslinked polyethylene (XLPE) or FDA/NSF 61-compliant linear polyethylene. These stations are engineered for durability, chemical resistance, and long service life.
Available Models
Model availability and specifications subject to change. Gallonage and weights are approximate. All wall thicknesses conform to ASTM D-1998. Consult factory for details.
Customization Options
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Primary tanks in corrosion-resistant crosslinked polyethylene
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Primary and secondary containment tanks available in multiple colors
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Fittings in a range of sizes and materials to match your application
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Adhesive-backed decals with your company name and logo
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Dosing pumps (diaphragm and peristaltic)
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Level sensors, alarms, drain valves, and additional instrumentation
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Skid mounting with custom piping
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Redundant pump setups for critical applications
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Immersion heaters or heat trace
We stock standard units you can buy and outfit yourself, or we can deliver a fully assembled, application-specific system — your call.
Choosing the Right Metering Pump for Your Chemical Feed Station
The metering pump is the heart of any chemical dosing system. The right choice depends on your chemical, flow rate, system pressure, and fluid characteristics.
Diaphragm Metering Pumps
Solenoid-actuated (electronic) diaphragm pumps are the most economical option for low-flow, low-pressure chemical dosing. They’re ideal for pumping clean, aggressive chemicals into higher-pressure systems and require very little maintenance.
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Dosing accuracy of ±3%
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Onboard relief valve protects against over-pressurization
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Microprocessor-controlled for constant or proportional dosing
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Liquid-end components available in PVDF and food-grade PTFE for broad chemical compatibility
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Single moving part — virtually wear-free with no lubrication required
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Wall-mount and base-mount options; analog and digital control variants
Best for: Clean, corrosive chemicals like acids, sodium hypochlorite, and caustic soda in pressurized systems.
Peristaltic Metering Pumps
Peristaltic pumps use a rotor with rollers to squeeze a flexible tube, pushing fluid to the discharge port. This design eliminates valves that can clog and allows the pump to run dry without damage.
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Constant flow rates up to 100 psi
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No ancillary equipment needed (no foot valves, degassing valves, or back-pressure valves)
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IP65-rated for dust and water resistance
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Premium Santoprene and SekoBril tubing standard; additional tubing options available for severe-duty applications
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High-precision stepper motors on select models for outstanding dosing accuracy
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Quick, tool-free tube replacement
Best for: Viscous, abrasive, or off-gassing chemicals, slurries, and fluids with suspended solids in lower-pressure systems.
Frequently Asked Questions
What is a chemical feed station?
A chemical feed station is a self-contained system designed to store and accurately meter chemicals into water treatment, wastewater, or industrial process lines. It typically includes a primary storage tank, secondary containment basin, and a dosing or metering pump.
What chemicals can polyethylene chemical feed stations handle?
High-density crosslinked polyethylene (XLPE) and linear polyethylene tanks are compatible with a wide range of chemicals, including sodium hypochlorite, sulfuric acid, hydrochloric acid, caustic soda, ferric chloride, polymer, and many more. Always consult a chemical resistance chart or contact us for confirmation.
What size chemical feed stations are available?
Our Assmann chemical feed stations range from 40 to 550 gallons. Custom sizing and configurations are available for unique applications.
Do chemical feed stations include secondary containment?
Yes. Every unit features an integrated containment basin capable of holding a minimum of 110% of the primary tank volume. Check your local regulatory agency for specific compliance requirements in your area.
Can I get a fully assembled, ready-to-install system?
Absolutely. We offer turnkey chemical dosing systems pre-plumbed and pre-wired on a skid — complete with pumps, sensors, alarms, and controls — so you can install and start operating with minimal downtime.
Let’s Design Your Chemical Feed Solution
Every application is different. Contact us today with your chemical, flow rate, and site requirements, and our engineering team will design a system that fits your needs, your space, and your budget.
