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Stenner 45M5 3/8" Single Head Feeder | 45MJL5A3STAA

Stenner SKU: 45MJL5A3STAA

Stenner 45M5 3/8" Single Head Feeder | 45MJL5A3STAA

Stenner SKU: 45MJL5A3STAA
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$529.99 Regular price $629.99
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Questions about returns? View our return policy.
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Stenner 45MJL5A3STAA Classic Series Single Head Adjustable Peristaltic Metering Pump – 2.5–50 GPD, 25 PSI Max, 120V (3/8" White Santoprene® Tube)

The Stenner 45MJL5A3STAA is a Classic Series single head adjustable-output peristaltic metering pump built for reliable chemical feed in pools, water treatment, and industrial dosing applications. Output is adjusted with the built-in manual feed-rate control, giving you flexible dosing without changing pump heads or electronics.

Key Features

  • Type: Classic Series single head adjustable-output peristaltic pump
  • Adjustable dosing: Approx. 20:1 turndown with 2.5% increment adjustment (manual feed-rate control)
  • Self-priming: Designed to self-prime and resist vapor lock; suitable for many off-gassing solutions
  • 3-point roller design: Helps with anti-siphon performance and steady output
  • Service-friendly: Motor, feed-rate control, and pump head are designed to separate for easier service
  • QuickPro® style head: Simplifies routine pump-tube service (tool-free tube change on compatible heads)

Performance & Electrical

  • Model/Output class: 45M5
  • Output range (up to 25 PSI): 2.5–50 gallons per day
  • Maximum pressure: 25 PSI
  • Voltage/Frequency: 120V, 60 Hz
  • Tube size & color: 3/8" white
  • Tube material: Santoprene®

Typical Applications

  • Pool and spa chemical feed (sanitizer, pH control)
  • Water conditioning and filtration pretreatment (oxidation / disinfection support)
  • Industrial process dosing and cooling tower treatment

What’s Included

  • Stenner Classic Series adjustable-output pump (single head), factory-configured for 3/8" white Santoprene® tubing

Related Products

Installation & Maintenance Tips

  • Calibrate feed rate after installation—actual output varies with chemical type, suction lift, and system pressure.
  • Replace the pump tube on a schedule; a worn tube is the most common cause of low output, inconsistent feed, or loss of prime.
  • If the motor runs but flow is low, inspect the injection check valve and injection fitting for scale or blockage.
  • Keep suction connections airtight—small air leaks on the suction side can cause intermittent dosing.
  • Mount the pump in a location that minimizes UV/weather exposure; use a rain roof or enclosure if installed outdoors.
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.