Sequence External Pumps

Sequence pumps are the heartbeat of a functional water garden system. These Sequence centrifugal pond pumps are designed and built to meet the special needs of ponds, waterscapes and aquaculture. Buying 'quality' really pays. Not only do you get years of dependable service, but you enjoy tremendous savings on your utility bill, every month. Cost Saving Efficiency, Quiet Operation, Reliability and Versatility are the trademarks of Sequence Pond Pumps. Priming pots are strongly recommended on all Sequence pond pumps except the Self-Primer which has an integrated strainer basket.

If you aren't sure how much total head pressure your system creates, please refer to 'Choosing The Correct Pump' at the bottom of this page.
Click Here to see how Sequence Pumps can save you money on your energy bill.

The people at Sequence® are on a never-ending quest for peak-efficiencies and premium-quality.  Today, their latest efforts are captured in Sequel™.

Sequel™ is for those who understand what words like “premium-quality,” “peak-performance & efficiency” and “extensive-reliability” are supposed to mean.  Sequel™ has been custom crafted for the artistic as well as the technically inclined.  It is a premium product suited for the most exclusive of water-features.  Sequel guarantees quality, performance, efficiency and reliability.  Did they miss anything?
 
Sequence has chosen to use only Super-E efficient motors by BALDOR.  These motors are made to work in concert with their high-efficiency pump ends to yield the very low power consumptions the market has come to expect out of a product by the people at Sequence®.  The Super-E motors are the highest motor quality available in this class.  When used with our high-grade internal components, you have a product that is guaranteed to work longer than most pumps now sold on the market, (4 year limited warranty).

But it doesn’t stop there.  The main feature to consider is the fact that every Sequel pump ALREADY contains the ability to offer an extensive performance coverage that the competition will struggle to provide.  Every pump contains a performance upgrade. That's right, every pump contains multiple impellers for multiple performance points.  This provides unbeatable “low power consumption” performance for almost any environment.  So, when you want to increase your flow rates for the summer season or just because you have recently expanded your water feature, Sequel offers you the pump to do the job, without having to buy a bigger unit.  It is like you have an entire family of pumps wrapped up in one package.

Before you can pick the best pump for your pond, you need to determine two things:

   (1) The flow rate you want
   (2) The total dynamic head (TDH) your system requires to deliver that flow rate. 

Since the head affects the pump's flow rate, you must know both parameters to properly select a pump.

Flow - The exact flow rate you will need depends on many factors including the size of your pond and waterfall as well as the amount of fish, plants and sunlight. Before you can find that pump, you MUST HAVE the head required by your pond system for that flow rate!!!

Head - Head is a measure of resistance to flow. If a pump has a maximum output of 20 head feet, it means it can pump water 20' straight up in the air. If a pump is rated at 50 gallons per minute at 10 feet it means it can pump water up 10 feet and still deliver 50 GPM. As you increase the head, (above the full flow head) you will decrease the flow rate. Therefore to maximize your flow, you must minimize your head.

For pond applications the three main sources of head pressure are:

   1. Static Head - This is the vertical distance you raise the water. To determine your static head, measure from the surface of the pond (vertically), to the highest point in the discharge line where the water is discharged to the atmosphere. This is usually the top of your biological filter, stream, or waterfall.

   2. Friction Head - As water flows through pipe and fittings there is resistance. The higher the flow rate, and/or the smaller the pipe, the higher the resistance. Determine your overall pipe length, including equivalent length for your fittings. Consult the Friction Loss Chart . Find where the column for your pipe diameter intersects the row for your flow rate and read your friction loss per 100' pipe. Use large enough pipe to minimize this friction loss. It is usually best to keep your friction losses to around 5 feet/100' of pipe.

   3. Pressure Head - Any additional pressure required by filters, UV lights, foam fractionators, spray nozzles, etc. must be calculated. Determine the pressure drop across each device. The conversion is 1 psi = 2.31 head feet. (i.e. a 5 psi drop across a filter = 11.55 feet)

To determine your TDH (as represented on pump curves and tables), add your static head, friction head and pressure head. Now that you know your flow and head, you can select a pump that provides this performance, and does so efficiently.