Living with well water that carries an iron bacteria smell or a constant sulfur note can make you think twice about every glass of water. A stenner pump for liquid chlorine solves this by injecting a precise dose of chlorine into your water line before it reaches your home. In this guide, we review four Stenner pump options and help you match the right model to your household’s water use.
Whether you are building a new treatment system or upgrading an existing one, the choice comes down to flow rate, pressure, tube material, and the included installation parts. We compared the key specifications and real-world performance of these models to give you a clear recommendation. If you are new to well water treatment, start with a complete guide to choosing the right well pump, then browse the full well pumps collection for more ideas.
Pros
- Precise, adjustable chemical dosing with a wide 0.2 to 3 GPD range
- High 100 PSI pressure rating suitable for demanding installations
- Complete kit with all essential accessories included in the box
- Santoprene tubing resists chemical degradation, extending pump life
- Simple corded electric operation and easy mounting
Cons
- Premium price reflects the professional-grade build
- Limited customer feedback so far, making long-term performance less verified
- May be more capacity than needed for very small or low-pressure applications
The Stenner 45MJH1A1STAA is a compact yet powerful adjustable diaphragm pump designed for precise chemical injection, most commonly used for chlorine treatment in well water, pool, and irrigation systems. With an adjustable output ranging from 0.2 to 3 gallons per day and a 100 PSI pressure rating, this pump offers the flexibility and power needed for a variety of water treatment tasks.
One of the standout features is the Santoprene pump tube, which delivers excellent resistance to chlorine and other water treatment chemicals. The included installation kit further simplifies setup, providing 20 feet of tubing, injection check valve, weighted suction strainer, mounting bracket, and an extra pump tube. This all-in-one package saves time and ensures you have everything required for a professional installation.
Build quality is exactly what you would expect from Stenner Pump Company, a trusted name in water treatment. The pump operates on standard 110/120V power and features a straightforward adjustable speed mechanism for easy dosing changes. Its compact design and included mounting bracket allow for convenient placement on walls or equipment panels.
Potential drawbacks are minimal but worth noting. The price is higher than basic peristaltic pumps, reflecting its durability and precision. Additionally, since it has only a handful of customer reviews so far, widespread long-term feedback is limited. Some users may also find the 0.2 minimum GPD too high for ultra-low dosing needs.
Overall, the Stenner 45MJH1A1STAA is an excellent investment for homeowners, pool operators, and water treatment professionals who need a reliable, accurate chlorine injection solution. With its complete kit, durable construction, and strong brand reputation, this pump offers outstanding value for those who prioritize quality and performance.
Brand: Stenner Pump Company
Model: 45MJH1A1STAA
Product Type: Adjustable Diaphragm Chemical Injection Pump
Feed Rate: 0.2 to 3 GPD (gallons per day)
Pressure Rating: 100 PSI
Voltage: 110/120 V
Tube Material: Santoprene
Suction/Discharge Tubing: 1/4 inch
Included Tubing Length: 20 feet of 1/4 inch white tubing
Kit Includes: 3 connecting nuts, 3 ferrules, injection check valve (100 PSI), weighted suction strainer, 20 ft tubing, additional pump tube, mounting bracket
Power Source: Corded Electric
Color: White
Material: Santoprene
Style: Above Ground
Item Weight: 9 pounds
Manufacturer Part Number: 45MJH1A1STAA
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
- 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
- Reliable fixed-speed dosing ensures consistent chemical delivery
- High pressure rating handles long tubing runs and backpressure
- Simple, robust design reduces maintenance needs
- Compatible with common chlorine injection systems
- Brand reputation for durability and performance
Cons
- Fixed speed limits flow adjustment without additional controls
- Motor and pump head only, requiring separate controller or timer for automated dosing
- May need additional fittings or tubing for complete installation
The Stenner Pump 85MPHP17 is a dedicated chlorine injection pump designed for water treatment professionals. It combines a fixed-speed motor and pump head rated at 17 GPD and 100 psi, making it ideal for consistent chemical dosing in residential or light commercial systems.
Its standout feature is the high pressure capability, allowing reliable injection even against line pressure. The fixed speed ensures predictable flow, which is critical for maintaining proper chlorine residuals. Users appreciate the straightforward design that integrates easily into existing setups.
Build quality is typical of Stenner products, with durable materials and a compact footprint. The unit weighs under 8 pounds and measures just 6x10x6 inches, simplifying mounting. The motor runs on standard household voltage, reducing electrical complexity.
A key drawback is that this is only the motor and pump head, so you must supply your own controller, tubing, and injection fittings. The fixed speed also means you cannot adjust output without adding a variable speed drive or timer.
Overall, the Stenner Pump 85MPHP17 is a solid choice for those needing a reliable, high-pressure chlorine injection pump. It delivers on performance and durability, though it requires additional components for a complete system. Experienced installers will find it a worthwhile investment.
Understanding a few core specifications will make your selection easier. Our recommendations reflect the models that deliver the most reliable performance in 2026, and the points below cover the specs that matter most. If you want a quick overview, our chlorine injection pumps page is a handy reference.
Flow Rate and Adjustability
The amount of chlorine you need depends on your water demand and contamination level. Stenner pumps are rated in gallons per day (GPD), and adjustable models like the Stenner Pump Company 45MJH2A1S offer a range from 0.5 to 10 GPD, so you can dial in the exact dose.
Smaller households may prefer the Stenner Product #45MJH1A1STAA, which outputs 0.2 to 3 GPD. That narrower range gives you finer control at low flow rates without wasted adjustment.
If you want the same flexibility as the 45MJH2A1S but prefer a separately listed option, the Stenner Peristaltic Pump Adjustable Head uses the same 0.5 to 10 GPD range. It is a practical choice when you need a complete replacement or a second pump for a separate system.
To estimate your chlorine demand, multiply your daily water use by the chlorine concentration you want to maintain. The pump’s GPD rating tells you how much solution it can inject at full output, so you can compare that number with your target dose. Start at the low end of the range and adjust after checking residual chlorine levels.
Pressure Rating and Tube Material
All four pumps handle up to 100 psi, which covers the pressure found in most residential well systems. If your pressure tank output runs higher, check the specs in our well pump for pressure tank to confirm compatibility.
Chlorine is a strong oxidizer, so the tubing material matters. Santoprene resists chlorine damage and stays flexible across a wide temperature range, which reduces leaks and extends service life.
Each adjustable head kit includes 20 feet of 1/4-inch white tubing, so you have enough line to reach from the pump to the injection point. The 1/4-inch diameter also keeps suction and discharge lines easy to route through tight crawl spaces and utility closets.
Pressure rating matters because the pump must push chlorine through the injection valve and into the pressurized water line. A 100 psi rating covers standard jet pumps and most submersible installations. If your system uses a constant pressure controller, the pump should still produce enough pressure at the injection point.
Kit Contents and Installation
A true chlorine injection kit should include the small parts that often get lost during installation. Stenner includes three 1/4-inch connecting nuts, three ferrules, a 100 psi injection check valve, and a weighted suction line.
The injection check valve is critical because it prevents water from flowing backward into the pump when the system is off. The weighted suction line keeps the pickup end submerged in your chlorine supply, so the pump primes quickly and runs smoothly.
These extras cut down the number of trips to the hardware store. If you are planning a complete setup, our complete well pump kit buying guide shows how the injection pump fits alongside a pressure tank, filter, and other components.
Start by mounting the pump close to the chlorine storage container and the injection point. Keep the suction line as short as practical to reduce friction and priming difficulties. You can use the included ferrules and connecting nuts to secure the tubing to the pump head without over-tightening.
Fixed vs Adjustable Head
Adjustable head pumps let you change the output by rotating the head, which is convenient when chlorine demand changes with the seasons. You can add more chlorine during warm months and reduce the dose in cooler weather without swapping tubes.
The Stenner Pump 85MPHP17 (Motor and Pump Head only) takes a different approach with a fixed output of 17 GPD. This high output is designed for applications that need a consistent, heavy dose of chlorine.
Because this unit is sold as a motor and pump head only, you will need to supply your own tubing, fittings, and check valve. That makes it a strong option for owners who already have those parts or who are replacing a worn pump on an existing system.
Fixed head pumps tend to require less daily adjustment, but they still need routine inspection of the tubing and check valve. Adjustable head pumps let you compensate for changing chlorine demand while keeping the motor speed constant. For seasonal water use, that flexibility often pays off.
Final Thoughts
Choosing the right Stenner Pump Company 45MJH2A1S gives you flexible control for most residential well water applications, while the Stenner Product #45MJH1A1STAA offers a lower output range for smaller systems. Match the pump’s GPD rating to your water usage and chlorine demand, and you’ll enjoy clean, consistent disinfection for years to come.
Frequently Asked Questions
What is the difference between an adjustable and a fixed head Stenner pump?
An adjustable head Stenner pump lets you change the output by rotating the head, so you can fine-tune the chlorine dose without changing parts. A fixed head pump runs at a single output, like the 17 GPD rating on the Stenner Pump 85MPHP17 (Motor and Pump Head only). If your water demand stays steady, a fixed head model gives you dependable performance with fewer adjustments.
How many gallons per day do I need for chlorine injection?
The right GPD depends on your household water use and the level of treatment required. For an average home, a 0.5 to 10 GPD range gives you plenty of room to adjust. A low-output model in the 0.2 to 3 GPD range works best for small families or for treating only the kitchen tap.
Can I install a Stenner chlorine injection pump myself?
Yes, a Stenner chlorine injection pump is one of the more DIY-friendly water treatment upgrades. The complete kits include an injection check valve, connecting nuts, ferrules, and a weighted suction line, so the pump can be connected with basic plumbing tools. For bigger projects, a comprehensive well pump kit for home guide can help you plan the full layout.
What tubing material is best for liquid chlorine?
Santoprene is the standard choice for chlorine injection because it resists chemical breakdown and remains flexible under pressure. The adjustable head models in this guide use Santoprene tubing and ship with 20 feet of 1/4-inch line. Replace the tubing according to the manufacturer’s schedule to prevent flow restriction and keep the pump steady.
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