If you rely on a private well, keeping your water free from bacteria and iron often comes down to one piece of equipment: the chemical injection pump. The Stenner pump 85MHP17 has become a go-to for homeowners and professionals who need steady, low-maintenance chlorination without constant babysitting. With a peristaltic design that squeezes fluid through a flexible tube, this pump protects your water while also protecting itself from corrosive chemicals that can ruin other types of pumps.
In this guide, we evaluate the top Stenner 85MHP17 models sold today, covering both fixed head and adjustable head versions. We break down flow rates, pressure ratings, tubing materials, and installation requirements so you can make a confident decision. We also highlight what each pump kit includes and how those components affect setup time. If you are still researching the rest of your well setup, read our complete guide on what pump you need for your well before you commit to a purchase.
Pros
- Adjustable 2 to 40 GPD flow range offers flexibility for a variety of dosing rates
- 100 psi pressure rating handles high pressure injection scenarios
- Includes an extra pump tube and installation accessories for convenient setup
- Santoprene tubing resists chemicals and wears well over time
- Highly rated for performance and dependability in water treatment
Cons
- Operates on 120V only, limiting compatibility with 240V systems
- May require an external timer or controller for automated dosing
- Santoprene tubing must be periodically replaced depending on chemical compatibility and usage
The Stenner Pump 85MHP7 is a peristaltic metering pump with an adjustable head that delivers precise chemical dosing for water treatment systems. It is designed for homeowners, small farms, and professionals who need reliable chlorine injection into well water, cisterns, or irrigation systems.
With an adjustable flow rate from 2 to 40 gallons per day and a pressure rating of 100 psi, this pump handles a wide range of injection scenarios. The included Santoprene pump tube offers excellent chemical resistance and helps maintain accurate, repeatable dosing over time.
Built by Stenner Pump Company, a well known name in metering pumps, the 85MHP7 features a rugged configuration that is simple to install and service. The full kit includes an injection check valve, weighted suction strainer, tubing, and an extra pump tube, so you can mount it and get to work quickly.
One drawback is that it operates on 120V only, which may not suit installations with different power supplies. Also, for fully automated dosing you will likely need to add a timer or controller, as the pump itself does not include those functions. Regular tube replacement is a normal maintenance requirement for any peristaltic pump.
Overall, the Stenner 85MHP7 offers proven reliability, flexible flow control, and all the essentials for accurate chemical injection. If you need a trustworthy chlorine injection pump for a 120V system, this model deserves serious consideration.
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
- 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.
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.
Pros
- Highly adjustable flow rate offers precise control for various dosing needs
- Stainless steel and Santoprene materials ensure durability and chemical resistance
- Quick-release head simplifies maintenance and reduces downtime
- Self-priming design guarantees reliable startup even after long periods of inactivity
Cons
- Requires 220V power supply, which may not be available in all residential settings
- Premium price point may be a barrier for budget-conscious buyers
- Limited to lower flow rates (up to 17 GPD), not suitable for high-volume applications
The Stenner 85MHP17 Chemical Metering Pump Kit is a professional-grade peristaltic pump designed for precise chemical dosing in swimming pools, water treatment systems, and industrial processes. It is best suited for operators who need consistent, adjustable flow rates and reliable performance with chlorine-based chemicals.
Standout features include a variable feed rate dial with 10 settings ranging from 0.8 to 17 gallons per day, allowing fine-tuned control. The self-priming peristaltic action isolates the fluid from internal parts, minimizing wear and maintenance. In real-world use, users report steady dosing and easy setup, especially with the included 20-foot tubing and mounting bracket.
Build quality is robust, featuring a stainless steel frame and a clear pump head for visual flow confirmation. The quick-release tube design makes replacing the Santoprene tubing simple, which is critical for handling sodium hypochlorite. The 220V/60Hz motor ensures consistent power delivery for continuous operation.
Potential drawbacks include the need for a 220V outlet, which limits installation locations, and the higher cost compared to basic diaphragm pumps. Additionally, the flow range, while adequate for many applications, may be too low for large-scale commercial systems. Some users might find the initial setup requires careful calibration.
Overall, the Stenner 85MHP17 is a reliable, durable choice for those who demand precision and longevity in chemical metering. Its ease of maintenance and chemical compatibility make it a worthwhile investment for pool professionals and water treatment specialists. If your application fits within its flow range and power requirements, this pump delivers consistent results.
All six pumps come from the same dependable family, but the right choice depends on whether you want a fixed feed rate or the ability to adjust on the fly.
Buying Guide: How to Choose the Right Stenner 85MHP17 Pump
We evaluated each pump based on build quality, ease of maintenance, and practical dose ranges. These are the features that matter most when choosing a chemical injection pump for your well water.
Flow Rate (GPD): Match the Pump to Your Water Demand
Gallons per day, or GPD, is the most important specification because it controls how much treatment chemical your pump injects into the water line. The fixed head Stenner 85MPHP17 is rated at 17 GPD, which suits a typical single family home with moderate chlorine demand. If you only need to treat a smaller volume of water, you might prefer a lower output version. A simple rule of thumb is to calculate your daily water usage and desired chlorine concentration, then work backwards to the required GPD.
An adjustable head model like the Stenner 85MJH2A2S offers a range from 0.8 to 17 GPD. Having that dial allows you to start with a low dose and increase it as your water quality changes. We recommend choosing a unit with some headroom so you can handle peak demand during summer months or heavy rains without underdosing.
Pressure Rating and Tube Material
All the pumps we reviewed are rated for 100 psi, which matches the output of most well pressure tanks. This rating means the pump can inject chlorine into a pressurized water line without struggling or stalling. Keep in mind that the pressure rating is a fixed design characteristic, not something you adjust after purchase. Higher pressure systems may need a booster pump, but 100 psi covers most residential setups.
Santoprene tubing is standard on these pumps because it resists chlorine, ozone, and many other chemicals used in water treatment. Most models use 1/4-inch suction and discharge lines, and replacement tubes are inexpensive and easy to source. For a complete system, pair your pump with a suitable pressure tank from our top picks for well pump pressure tanks.
Fixed Head vs. Adjustable Head
A fixed head pump delivers one constant flow rate, which is perfect if your water quality stays stable throughout the year. The Stenner 85MPHP17 is a fixed head model that many homeowners trust for worry free chlorination. There is no dial to fiddle with, so you can set it and forget it for months at a time. Both types use the same Santoprene tube, so replacement parts are nearly identical.
An adjustable head pump gives you a physical dial to change the feed rate, so you can respond to seasonal changes in water quality or switch between treatment chemicals without buying a new pump. This flexibility is especially useful for properties with fluctuating iron or bacteria levels. To see how these pumps fit into a full water treatment setup, explore our chlorine injection pump category.
Voltage and Installation Considerations
Most Stenner 85MHP17 pumps run on standard 120V/60Hz household current, which is convenient for most homeowners. Some kits are configured for 220V/60Hz, a standard in certain commercial and agricultural settings. Be sure to verify your electrical supply before ordering because mismatched voltage can damage the motor. If you are not comfortable with wiring, hire a licensed electrician for the installation.
Many pump kits include the injection check valve, a weighted suction line, and the connecting nuts and ferrules needed for a basic install. The clear pump head lets you see the roller action, so you can confirm operation at a glance. For a broader overview of pump configurations and accessories, check out our well pump kit buying guide.
Final Thoughts
Choosing the right Stenner 85MHP17 comes down to how much control you want over your injection rate. If you prefer a simple, fixed output, the Stenner Peristaltic Pump 85MPHP17 – Fixed Head is a dependable choice that keeps things straightforward. If you need adjustable dosing for changing water conditions, the Stenner 85MHP17 Chemical Metering Pump Kit offers the same quality with built-in flexibility. Either way, you are getting a well built pump that will protect your water for years. Pair it with a good maintenance routine and you will hardly think about it again. The best choice ultimately depends on your specific water chemistry and how much time you want to spend on maintenance.
Frequently Asked Questions
What is the difference between the Stenner 85MHP17 and the 85MPHP17?
The 85MPHP17 is the fixed head version of the Stenner 85MHP17 pump, rated at a constant 17 GPD. The model name 85MHP17 is often used as an umbrella term for this whole family, while adjustable versions like the 85MJH2A2S let you vary the output from 0.8 to 17 GPD. If you are comparing replacement parts, the pump head assembly and tube are different between fixed and adjustable models, so check the manual before ordering.
How much maintenance does a Stenner 85MHP17 pump require?
Peristaltic pumps are low maintenance. Check the Santoprene tube every few months and replace it when it shows signs of cracking or loss of flexibility. The quick release pump head design on many models allows you to swap the tube in under five minutes. Regular cleaning of the injection check valve will also extend the life of the pump.
Can I use a Stenner 85MHP17 pump for chemicals other than chlorine?
Yes, these pumps work with a variety of water treatment chemicals, including some acids and caustic cleaners. Always verify compatibility with the tube material before use. Liquid chlorine, or sodium hypochlorite, remains the most popular application because it is effective and easy to handle. For less common chemicals, consult the manufacturer’s compatibility chart.
What voltage options are available for the Stenner 85MHP17?
Most models are built for 120V/60Hz, but some kits are available in 220V/60Hz. Check your electrical setup before purchasing. For tips on protecting your pump and motor, see our well pump with soft start. Using a surge protector or soft start controller can help extend the life of your injection pump.
Write Your Review
No reviews yet. Be the first to share your experience!