If you rely on well water, maintaining proper chlorine levels is essential for safety and taste. A chlorine injection pump from Stenner takes the guesswork out of dosing, delivering precise amounts of chlorine directly into your water line. Whether you treat a private well or a small commercial system, this guide covers the top Stenner models to match your flow and pressure needs. We have evaluated each pump based on build quality, adjustability, and real-world performance. For a broader look at well pump options, check our complete guide on choosing the right pump for your well.
Pros
- Accurate and repeatable dosing with adjustable speed control
- Built to handle high pressure (100 PSI) without leaking or stalling
- Includes all necessary accessories for immediate installation
- Santoprene tubing resists wear and chemical attack, reducing downtime
- Simple tube change procedure saves time on maintenance
Cons
- Flow rate limited to 10 GPD, not suitable for high-volume applications
- Requires a dedicated 120V outlet; no battery or solar option available
- Premium price point may be a barrier for small-scale or occasional users
The Stenner 45MJH2A1S is a peristaltic metering pump engineered for precise chemical injection in industrial and commercial water treatment systems. It is particularly well-suited for chlorine dosing in pools, cooling towers, and municipal water supplies, where accuracy and reliability are critical.
Its standout feature is the adjustable flow range of 0.5 to 10 gallons per day at a constant 100 PSI pressure. This allows operators to fine-tune chemical feed rates without sacrificing performance. The Santoprene pump tube provides excellent resistance to chlorine and other harsh chemicals, ensuring long-term durability and consistent output.
Build quality is robust: the pump features a white, corrosion-resistant housing, a powerful 120V motor, and a simple tube replacement mechanism. The included kit (check valve, strainer, tubing, and mounting bracket) means you can install it right out of the box with minimal extra parts.
One potential drawback is the flow rate ceiling of 10 GPD, which may be insufficient for very large systems requiring higher injection volumes. Additionally, the pump requires a standard electrical outlet, limiting placement options in remote or outdoor settings. The price is also on the higher side for entry-level users.
Overall, the Stenner 45MJH2A1S earns top marks for precision, build quality, and ease of installation. If you need a dependable, high-pressure metering pump for chlorine or similar chemicals, this model is an excellent investment that will deliver years of trouble-free service.
Model: 45MJH2A1S
Flow Rate: 0.5 to 10 GPD (adjustable)
Maximum Pressure: 100 PSI
Power Supply: 120V, 60Hz, Corded Electric
Tube Material: Santoprene (Number 2 tube size)
Suction/Discharge Tubing: 1/4 inch ID, 20 feet included
Included Accessories: Injection check valve, weighted strainer, connecting nuts, ferrules, mounting bracket, spare pump tube
Color: White
Style: Above Ground
Brand: Stenner Pump Company
Pros
- Professionally designed for continuous duty in water treatment
- Adjustable flow rate gives flexibility for various chemical dosing needs
- Comes with necessary accessories for a clean swap or new installation
- Strong build quality and positive customer feedback on durability
Cons
- Some units may arrive with broken hose ends or appear rebranded
- Occasional reports of failure within the first year of use
- Warranty support may require contacting the manufacturer directly
The Stenner 85MJH2A2S is a peristaltic chemical injection pump designed for precise, adjustable dosing in water treatment and pool maintenance. With a flow range of 0.8 to 17 gallons per day and a 100 PSI pressure rating, it handles both light and heavy chemical injection tasks.
Its standout feature is the adjustable head, allowing you to fine-tune the output without changing tubing. The Santoprene tube resists degradation from common chemicals like chlorine, ensuring consistent performance. The 120V AC motor makes it easy to install with standard power.
Build quality is robust, with a polycarbonate housing and industrial design. Customer reviews praise its reliability and professional performance, with many noting it as a worthy replacement for aging units. However, a few users reported receiving units with damaged connectors or early failure.
Potential drawbacks include the need to verify compatibility with your existing system, as low and high pressure models differ. The lack of a clear warranty policy in the box may be a concern for some buyers.
Overall, the Stenner 85MJH2A2S is a solid choice for anyone needing a dependable chemical injection pump. Its adjustability and high pressure make it suitable for both residential and commercial applications, but check for damage upon delivery.
Pros
- High pressure rating of 100 psi for versatile applications
- Easy tube changes with the fixed head design
- Durable stainless steel build resists corrosion
- Consistent flow rate for accurate chemical metering
- Positive user feedback highlights improved design and ease of maintenance
Cons
- Some users report frequent tube replacements (monthly) in heavy-use scenarios
- Motor durability concerns after extended use, as noted in a critical review
- Fixed head limits flow rate adjustment flexibility compared to variable-speed models
The Stenner 85MPHP17 is a fixed-head peristaltic pump built for precise chemical injection, particularly chlorine, in water treatment systems. With a flow rate of 17 gallons per day and a pressure rating of 100 psi, it targets professionals who need reliable dosing without constant adjustments.
Standout features include its robust stainless steel construction and straightforward fixed-head design. Users praise the improved tube-changing mechanism, which reduces maintenance effort. The pump operates on standard 120V power, making it easy to integrate into existing setups.
Real-world performance is generally strong, with consistent flow rates that meet the demands of pool chlorination and emergency water treatment. However, one long-term user reported tube replacements every month and motor failure after the warranty period, suggesting variable reliability in continuous high-use environments.
Build quality is solid overall, with corrosion-resistant materials that should withstand harsh chemicals. The fixed head limits flow adjustment but simplifies operation for those who need a set dosing rate. It's a trade-off between simplicity and flexibility.
Verdict: The Stenner 85MPHP17 is a capable pump for routine chlorine injection, especially if you value durability and easy maintenance. Be aware of potential tube wear and motor longevity issues if running it heavily. It's a solid choice for water treatment pros who need a dependable fixed-speed solution.
Pros
- Highly adjustable flow rate allows precise dosing for various applications.
- Durable Santoprene tube and 100 PSI rating ensure long-lasting performance under pressure.
- Easy tube replacement with new head design simplifies maintenance.
- Quiet operation and compact design fit well in residential settings.
- Complete kit includes all necessary components for straightforward installation.
Cons
- Some units may arrive with missing parts, though the seller typically resolves promptly.
- FedEx shipping can be unreliable with poor tracking, causing delays.
- Instructions could be more detailed for first-time users unfamiliar with peristaltic pumps.
The Stenner 45MJH2A1S peristaltic pump is a top choice for homeowners and professionals needing precise chemical injection for water treatment. Designed for chlorine, hydrogen peroxide, and other solutions, it excels in pool chlorination, well water treatment, and industrial dosing.
Standout features include an adjustable flow rate from 0.5 to 10 GPD and a 100 PSI pressure rating, ensuring reliable injection into pressurized lines. Real-world users praise its quiet operation and consistent performance, with many reporting over a decade of trouble-free use.
The pump's build quality is robust, featuring a Santoprene tube that resists chemicals and wear. The updated head design allows quick tube changes without tools, making maintenance simple. The included kit adds value with all necessary components for installation.
Potential drawbacks include occasional shipping issues and missing parts, though the seller is responsive. The instructions may be sparse for beginners, but the pump's straightforward operation compensates.
Overall, the Stenner 45MJH2A1S is a reliable, adjustable, and durable peristaltic pump that delivers excellent value for precise chemical dosing. Its ease of maintenance and long lifespan make it a worthwhile investment for any water treatment system.
Brand: Stenner Pump Company
Model: 45MJH2A1S
Flow Rate: 0.5 to 10 GPD (36 liters per day maximum)
Pressure Rating: 100 PSI
Voltage: 120 Volts AC, 60 Hz
Tube Material: Santoprene
Suction/Discharge Tubing: 1/4 inch
Included Kit: Mounting bracket, three connecting nuts, three ferrules, injection check valve, weighted strainer, 20 feet of white tubing, and one spare pump tube
Power Source: Corded Electric
Style: Above Ground
Pros
- Corrosion-resistant plastic and stainless steel construction
- Standard 3/8-inch NPT threads for secure, universal fitting
- Compact and lightweight for easy installation in tight areas
- Quality-tested design delivers consistent backflow prevention
- Trusted Stenner brand known for reliable pump accessories
Cons
- Plastic material may not suit extreme pressure or heavy-duty industrial applications
- 3/8-inch NPT size limits compatibility to systems with matching fittings
- Single-port design is specialized for injection duty, not general-purpose flow control
The Stenner Pump Company UCINJ38 is a 3/8-inch injection check valve built for chemical feed and water treatment applications. It is designed to replace or upgrade the check valve on Stenner injection pumps and similar systems that need reliable backflow prevention.
What makes this valve stand out is its combination of a plastic body and stainless steel exterior, giving it corrosion resistance without adding unnecessary weight. It uses standard 3/8-inch NPT threads, so connecting it to existing tubing and injection points is straightforward for DIYers and professionals alike.
In real-world use, the valve delivers consistent sealing and prevents chemical backflow, which protects the pump head and keeps dosing accurate. The compact design fits into tight spaces, and the quality control testing helps ensure it performs right out of the box.
The main drawback is the 3/8-inch NPT size, which limits compatibility to systems that match that fitting. Also, while the plastic construction is durable for typical chemical injection pressures, users with demanding industrial setups may prefer a metal valve.
Overall, the Stenner UCINJ38 is a reliable, well-built replacement part that solves backflow issues and keeps water treatment equipment running smoothly. For anyone using Stenner pumps or compatible 3/8-inch injection systems, this check valve offers dependable performance and easy installation.
Model Number: UCINJ38
Size: 3/8 Inch
Inlet Connection: 3/8-inch National Pipe Tapered
Outlet Connection: 3/8-inch National Pipe Tapered
Material: Plastic with Stainless Steel Exterior Finish
Number of Ports: 1
Item Dimensions: 1 x 1 x 1 inches
Certifications: CSA, ULC
Pros
- Adjustable flow from 2 to 40 gpd covers a wide range of dosing needs
- 100 psi pressure rating allows injection into high-pressure water lines
- Quiet operation confirmed by a verified buyer review
- Complete kit includes spare tube, check valve, strainer, and mounting bracket
- Runs on standard 120V power for simple installation
Cons
- Mixed customer feedback due to limited reviews and one report of premature failure
- Warranty support may depend on the seller; third-party sellers can be unresponsive
- No flow meter or digital controls included; requires manual adjustment
The Stenner 85MJH7A1S is a peristaltic metering pump designed for precise chlorine injection in water treatment systems. It suits homeowners, small farms, and light commercial applications needing consistent chemical dosing at up to 100 psi.
The pump delivers 2 to 40 gallons per day with an adjustable head, giving you control over feed rates. Users report it runs quietly, a welcome improvement over older pumps. The Santoprene tube resists chemical wear and the kit includes a spare tube for quick replacement.
Build quality is typical Stenner, with a sturdy above-ground design and a mounting bracket. The 1/4 inch tubing and accessories, including a weighted strainer and injection check valve, get you set up quickly. It runs on standard 120V power.
However, the product has mixed feedback. One buyer experienced failure after six months and struggled to get warranty support from the seller, so confirm your seller's return policy before buying. With only a handful of reviews, long-term durability is not fully proven.
Verdict: The Stenner 85MJH7A1S offers reliable peristaltic dosing with quiet operation and useful accessories, but buy from a reputable seller and verify warranty coverage to avoid disappointment.
Model Number: 85MJH7A1S
Pump Type: Peristaltic Metering Pump
Flow Rate: 2 to 40 gallons per day (adjustable)
Pressure Rating: 100 psi
Voltage: 120V AC, 60 Hz
Tubing Size: 1/4 inch suction and discharge
Tube Material: Santoprene
Power Source: Corded Electric
Mounting: Includes mounting bracket for above-ground installation
Kit Includes: Three 1/4 inch connecting nuts, three ferrules, one injection check valve (100 psi), one weighted suction line strainer, 20 feet white tubing, one spare pump tube, and mounting bracket.
Buying Guide: What to Look for in a Stenner Chlorine Injection Pump
Flow Rate (Gallons Per Day)
The flow rate determines how much chlorine solution your pump can deliver daily. For residential wells, a range of 0.5 to 17 GPD is common, but larger systems may need up to 40 GPD. Stenner offers adjustable head models that let you fine-tune the output without changing tubes. This flexibility is ideal if your water demand varies seasonally.
If you are unsure about your required GPD, start by estimating your daily water usage and target chlorine residual. A pump like the Stenner 85MJH2A2S Peristaltic Adjustable-Head covers 0.8–17 GPD, making it a versatile choice for most homes.
Pressure Rating
All Stenner pumps in this lineup are rated at 100 PSI, which suits typical well systems with pressure tanks. Higher pressure ensures the pump can inject chlorine against the line pressure without backflow. If your system operates at higher pressures, confirm the pump’s rating. For guidance on matching a pump to your pressure tank, see our well pump for pressure tank.
Adjustable vs. Fixed Head
Adjustable head pumps let you vary the flow rate by turning a dial, while fixed head models deliver a constant GPD. Adjustable heads offer more control, especially if you need to change dosing seasonally. Fixed heads are simpler and often more affordable. For example, the Stenner Peristaltic Pump 85MPHP17 – Fixed Head is a straightforward 17 GPD unit with no adjustments needed.
Tube Material and Durability
Stenner uses Santoprene tube material, known for excellent chemical resistance and long life. The tubing is the only wear part, and replacing it is simple. All pumps come with 20 feet of 1/4-inch tubing and necessary fittings. For added reliability, consider the Stenner Pump Company UCINJ38 Injection Check Valve to prevent backflow and maintain consistent dosing.
Final Thoughts
Choosing the right chlorine injection pump depends on your well’s flow rate and pressure. For most residential setups, the Stenner 85MJH2A2S Peristaltic Adjustable-Head offers a great balance of adjustability and proven performance. If you need a higher capacity for larger systems, the Stenner Peristaltic Pump – 85MJH7A1S, 2-40 gpd delivers up to 40 GPD with the same Stenner reliability. Both models include the essential injection check valve and tubing for a complete setup. For more details on building a complete well pump system, explore our well pump kit for home guide.
Frequently Asked Questions
What size Stenner chlorine injection pump do I need?
Your required pump size depends on your daily water usage and desired chlorine residual. For a typical home using 200–400 gallons per day, a pump delivering 0.5–17 GPD works well. If you have higher demand or a commercial system, consider the 2–40 GPD model. Always confirm your well pump’s flow rate from your well pump kit with pressure tank specifications.
How do I install a Stenner chlorine injection pump?
Installation involves mounting the pump near your well tank, connecting the suction line to the chlorine container, and inserting the injection check valve into the water line. Most Stenner pumps come with a weighted suction line and check valve. Follow the manual for proper tubing routing and electrical connections. For a step-by-step guide, refer to our chlorine injection pumps category page.
Can I use a Stenner pump for other chemicals besides chlorine?
Yes, Stenner peristaltic pumps handle a wide range of chemicals including acids, caustics, and polymers. The Santoprene tubing is resistant to many corrosive substances. Always check chemical compatibility with the tube material and pump head. For water treatment, these pumps are also used for injecting fluoride, soda ash, or hydrogen peroxide.
How often do I need to replace the tubing on a Stenner pump?
Tubing life depends on pump speed and chemical type. With chlorine at moderate speeds, Santoprene tubing typically lasts 6–12 months. Stenner includes 20 feet of tubing with each pump, and replacement is straightforward. Check the tube for cracks or hardening periodically. Using a Stenner injection check valve helps extend tube life by preventing backflow.
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