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Poolweb Pool Automation Chemical Pumps sku: 45MJL5A4STAA
45M5 Adjustable Flow Pump - 25 PSI 50 GPD 120 Volt - 3/8 Inch UV Tubing 45M5 Adjustable Flow Pump - 25 PSI 50 GPD 120 Volt - 3/8 Inch UV Tubing
  • 45M5 Adjustable Flow Pump - 25 PSI 50 GPD 120 Volt - 3/8 Inch UV Tubing
  • 45M5 Adjustable Flow Pump - 25 PSI 50 GPD 120 Volt - 3/8 Inch UV Tubing
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45M5 Adjustable Flow Pump - 25 PSI 50 GPD 120 Volt - 3/8 Inch UV Tubing

By Stenner
Poolweb #45MJL5A4STAA
Ships after Oct 28, 2021
$380.73 $380.73
Unit price per 

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This single head Stenner pool chemical pump #45MJL5A4STAA provides reliable chemical feeding for your swimming pool. This model 45M5 series pump is an adjustable flow pump that has the potential of delivering 50 gallons of chemicals per day under a maximum pressure of 25 PSI. This 120 volt pump is able to prime liquid chemicals up to 25 feet away and will never lose prime.

Included with this pump is 20 feet of 3/8 Inch suction/discharge tubing used to connect the pump to the chemical tank and injection site. This black tubing is UV protected for installation in an environment where this tubing could be exposed to the sun.

This pump is provides an adjustable feed control system to control the feed of this pump to from 100% to 5% of its rated gallons per day in increments of 2.5 percent. It includes an external dial ring that can be turned to achieve the correct feed rate.

Included in the box with this pump is the suction and discharge tubing, weighted suction strainer, injection fitting, nuts and ferrules as well as a replacement internal tube and mounting bracket. Everything you need to for a standard installation of this pump is included.

Stenner chemical transfer feed pumps are one of the easiest pool chemical feed pumps to install and maintain. Over the last 60 years, Stenner has manufactured a simple and reliable chemical pump that is relied upon by commercial swimming pool facilities throughout the US.


  • Adjustable output potential of 50 gallons of chemical per day.
  • Includes 3/8 Inch Suction and Discharge Tubing.
  • 120 volt single head pump.
  • Quick and Easy to Service and Use.
  • Commercial grade components conform to ANSI/NSF STD 50.

Stenner Single Head Adjustable

Flow Rate Output Chart 25 psi (1.7 bar) maximum Approximate 20:1 turndown, 2.5% increments
Model Item
No. Prefix
Tube #
per Day
per Hour
per Minute
per Day
per Hour
per Minute
per Day
per Hour
per Minute
45 Series Approximate Output @ 60Hz Approximate Output @ 50Hz
45M1 45MJL1 #1 0.2-3.0 0.01-0.13 0.02-0.27 0.8-11.4 0.03-0.48 0.56-7.92 0.6-9.1 0.02-0.38 0.31-6.32
45M2 45MJL2 #2 0.5-10.0 0.02-0.42 0.04-0.89 1.9-37.9 0.08-1.58 1.32-26.32 1.5-30.3 0.06-1.26 1.04-21.04
45M3 45MJL3 #3 1.1-22.0 0.05-0.92 0.10-1.96 4.2-83.3 0.18-3.47 2.92-57.85 3.3-66.6 0.14-2.78 2.29-46.25
45M4 45MJL4 #4 1.7-35.0 0.07-1.46 0.15-3.11 6.4-132.5 0.27-5.52 4.44-92.01 5.1-106.0 0.21-4.42 3.54-73.61
45M5 45MJL5 #5 2.5-50.0 0.10-2.08 0.22-4.44 9.5-189.3 0.40-7.89 6.60-131.43 7.6-151.4 0.32-6.31 5.28-105.14

Technical Specifications

Poolweb Item #45MJL5A4STAA
Lead Time2 days (if out of stock)
Shipping Weight9.0 lb

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Standard ground shipments may be delivered sooner depending on where you are located, and the shipping method used to ship your order. Combining multiple items onto the same order can change the delivery date and expedited shipping costs, especially if the other items are not available for immediate shipment. Transit time is calculated in business days and does not include Saturday and Sunday.

Due to significant demand on swimming pool parts and equipment, we cannot guarantee out of stock items will be available for immediate shipment. If your order must arrive to you by a certain day, please contact us first and we will provide you with a more definitive shipping and receipt of your order.


This item can be returned within 30 days of order. See return policy for details and how to place a return.

Poolweb Guarantee

This item qualifies for a one-year guarantee. Poolweb guarantees that the item you receive will function as advertised for one year. See the Poolweb Guarantee for more details.

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