Product Details

Sequence® 4000 Series External Pump

The model 4000 series expansive design will meet today's increased market demand for performance on all levels. This series is a perfect blend of medium pressure and ample flow for the majority of ponds. Motor is totally enclosed, fan-cooled for durability. These External end-suction centrifugal pumps are ideal for water features, garden ponds, and Koi fish ponds. These sequence pumps can serve a wide variety of water transfer and re-circulation applications. They are designed to operate efficiently over a wide range of flows and pressures. In larger systems, you can use two or more Sequence pumps in parallel to multiply your flow. These external pumps can be installed near areas of relaxation and entertainment and will generate minimal noise levels. These pumps longevity is legendary.

  • low cost of ownership
  • Ideal for water features, garden ponds, and Koi fish ponds
  • Serve a wide variety of water transfer and re-circulation applications
  • Designed to operate efficiently over a wide range of flows and pressures
  • Generate minimal noise levels
  • Motor is totally enclosed
  • Fan-cooled Motor
  • Made in USA
  • 3 Year Limited Manufacturer Warranty

  • Instruction Manual .PDF
    Specification Sheet .PDF


    Item Number: 5000SEQ20
    Brand Name: Sequence
    Series: 4000
    Description: Sequence 4000 Series Straight Centrifugal External Pump
    Horsepower (hp): 1/4
    Inlet: 2" FNPT
    Discharge: 2" FNPT
    Max Pump Flow: 5000 GPH
    Max Head: 20.2 FT
    Flow At Total Dynamic Head of:
  • 4 FT = 4500 GPH
  • 8 FT = 3840 GPH
  • 12 FT = 3120 GPH
  • 16 FT = 2160 GPH
  • 20 FT = 120 GPH

  • Max Wattage: 263 Watts
    Max Amp: 2.3 amps @ 115 V
    Voltage: 115 / 60 Hz
    Power Cord: 8 FT
    Dimensions (Approx.): 14.75" L x 8.65" W x 8.56" H

    NOTE: These pumps are designed to operate below water level out of the water. If you need to operate the pump above water level, you will a Priming Pot/Strainer Basket and a Check valve. The check valve will get installed at the intake to allow for the water to stay in the intake line and create a siphon effect as these pumps do not pull water.

    Item may vary from photo

    Product Reviews

    5 stars based on 1 review 
    NY City
    The Sequence 4000 was easy to install and set a 2" high pressure T coupling.I prime it at the beginning of the season and disconnect the check valve and pump at the end of the season. Works great and virtually silent. 75 to 80 GPM. No problems.
    1 of 1 found this review helpful Was this review helpful to you? Yes / No

    Estimated Delivery Date

    All of our in-stock products usually ship the same or next business day. The table below will show you an estimated* date your order will arrive. See special notes below

    Shipping Method Approximate Processing Time Approximate Shipping Time Estimated Delivery Date
    Eco-Saver Shipping 1-3 business days if ordered by 12:00 Noon EST 2-10 Business Days
    Ground Service Same to Next day if ordered by 1:00 PM EST 2-7 Business Days
    3-day Select Same day if ordered by 1:00 PM EST 3 Business Days
    2nd Day Ai Same day if ordered by 1:00 PM EST 2 Business Days
    Next Day Air Same day if ordered by 1:00 PM EST 1 Business Day
    Next Day Air Saver Same day if ordered by 1:00 PM EST 1 Business Day by End of Day
    UPS Standard - Canada Within 24 to 72 hours 5-10 Business Days

    * Delivery dates are estimates only and can vary due to backorders, order processing delays, payment information, customs clearance, and various shipping delays that may be out of our control. Please refer to the specific product page which will show additional information, as some items may require additional shipping time or ship directly from our suppliers. After we receive your order, an order confirmation email is sent automatically from within our website which will show stock status for the item(s) on your order. Business days are Monday - Friday with Holidays excluded. When your order ships, we add your e-mail address into the UPS software which will send you tracking information, so you can track shipment status online, anytime! Here is a link to our complete shipping information including a UPS transit map: Click Here