Stenner 85M5 3/8" Single Head Feeder Pump 120V 3/8" White Tubing | 85MJL5A3STAA
Stenner
SKU: 85MJL5A3STAA
Stenner 85MJL5A3STAA Classic Series Single Head Adjustable Peristaltic Metering Pump – 85 GPD, 25 PSI, 120V (3/8" Tube)
The Stenner 85MJL5A3STAA is a Classic Series single head adjustable-output peristaltic metering pump designed for dependable chemical feed in commercial pools, water treatment, and industrial applications. Output is adjusted with an external dial to fine-tune dosing, while the peristaltic design stays self-priming and handles many off-gassing solutions without losing prime.
Key Features
- Series/Type: Classic Series 85MJ, single head adjustable-output peristaltic pump
- Adjustable feed control: External dial provides an adjustable range from approximately 5% to 100% output in 2.5% increments (20:1 turndown)
- QuickPro® pump head: Tool-free access and fast pump tube replacement
- Peristaltic dosing: Self-priming, consistent metering, and tolerant of many off-gassing chemical solutions
- Service-friendly design: Motor, feed rate control, and pump head separate without tools for easier maintenance
Performance & Specifications
- Max output (at 25 PSI): Up to 85 gallons per day
- Approx. adjustable range (at 25 PSI): 4.3 to 85 GPD
- Max working pressure: 25 PSI
- Max suction lift: 25 ft vertical lift (water)
- Voltage/Frequency: 120V, 60 Hz, single phase
- Max operating temperature: 125°F
- Max viscosity: Up to 1500 cP
- Pump tube (this model): Tube #5 (3/8" OD white) with Santoprene® tube material
- Motor: 1/30 HP, continuous duty
- Power cord: 6 ft cord with standard 120V plug
- Shipping weight (approx.): 9 lbs
Common Applications
- Pool and spa chemical feed (sanitizer, pH control)
- Water conditioning (oxidation, disinfection, scale/corrosion control)
- Industrial process dosing and cooling tower treatment
Related Products
- Search: Stenner 85MJL5A3STAA (check if this exact pump is listed in our catalog)
- Search: Stenner Pump Tube #5 (3/8" Santoprene) (primary wear item that controls output on this model)
- Search: Stenner QuickPro Pump Head Service Kit (roller/parts kits for QuickPro heads, depending on inventory)
- Search: Stenner Injection Check Valve (a restricted injection point can stop flow even if the pump runs)
- Search: Stenner Suction Strainer / Foot Valve (helps prevent debris from entering the suction line and pump head)
- Search: Stenner Rain Roof (MP90000) (recommended for outdoor installations)
- Shop: Stenner (browse more Stenner pumps, parts, and accessories)
Installation & Maintenance Tips
- Calibrate output in the field after installation—actual feed can vary based on chemical properties, suction lift, and system pressure.
- Replace the pump tube on a regular schedule; a worn tube is the most common cause of low output, loss of prime, and inconsistent dosing.
- If the pump runs but flow is low, inspect the injection check valve and the injection point for scale or blockage.
- Keep suction connections airtight—small air leaks on the suction side can cause intermittent output and priming issues.
- For outdoor installs, protect the unit from direct weather exposure (use a compatible rain roof/cover where applicable).
- After servicing, run the pump and visually confirm steady discharge flow, then re-check for drips or air intrusion at fittings.
Questions about returns? View our return policy.
Hours Of Operation:
Monday - Friday: 7:00 am to 5:00 pm Phoenix Time
Saturday: 8:00 am to 2:00 pm
Sunday: Closed
- We do not ship on Saturday or Sunday.
- Orders totaling more than $300 will require signature confirmation upon delivery.
- We process and prepare orders for shipment within 1 business day. Please note that many other pool supply retailers require 3–5 days of handling time before shipping.
- Orders placed after 1:00 pm Phoenix Time may not be eligible for same-day shipment.
- Expedited shipping options are available at checkout.
Return Policy:
- Products that are received damaged will receive a refund in store credit.
- Most products are eligible for return within 30 days of receipt, except where noted below.
- To initiate a return, please complete an RMA form prior to sending your item back.
- Original shipping costs are non-refundable and will be deducted from the return credit.
- Items returned missing accessories or original packaging, or that are not in the same condition as received, may be subject to a restocking fee of up to 100% depending on the condition of the item upon return.
- Some returns will be charged an automatic 15% restocking fee.
- We are unable to issue refunds for items that have been damaged or rendered inoperable due to installer error.
- Please complete the return form to receive your RMA number and return shipping label.
- Chemical products are not eligible for return under any circumstances.
- The Pentair Colorsync 618031 is not eligible for return.
- Pool cleaners are not eligible for return.
- Opened seals and o-rings are not eligible for return.
- Capacitors are not eligible for return.
- Plastic popup tools are not eligible for return.
- Automation components and circuit boards are not eligible for return.
- If a light is returned due to a reported malfunction and is found to be fully operational upon testing, return shipping costs and a restocking fee will be deducted from the refund.
- Orders refused at the time of delivery will be subject to the original shipping costs being deducted from the refund.
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