Pool PumpsAbove-Ground Filter Pump
Orka 94028965 Pool Pump Manual
Setup, everyday use, maintenance and troubleshooting for the 1.65 hp multi-speed above-ground pool pump, with verified specifications.
- WEF9.10 kgal/kWh
- SpeedMulti-speed
- Rated horsepower1.65 hp
- Est. yearly cost$136
About the Orka 94028965
Orka model 94028965 from the 16VORK-S2 line is a 1.65 hp multi-speed above-ground pool pump that meets ENERGY STAR efficiency requirements.
Its Weighted Energy Factor (WEF) is 9.10, meaning it moves about 9,100 gallons of water for each kilowatt-hour of electricity under the DOE test. The federal minimum for a pump of its type and size is 4.16, so it is about 119% more efficient than the least efficient pump allowed. Its WEF is higher than 58% of the 74 above-ground filter pump models in our database.
At its low-speed test point it moves 33.0 gpm against 8.8 ft of head using 143 W at 1,600 rpm. As a multi-speed pump it can run on a low speed for routine filtration and switch to high speed for vacuuming, cleaners or water features.
It uses an electronically commutated (ECM) motor with a rated output of 1.65 hp (0.74 hydraulic horsepower).
Specifications
| Brand | Orka |
|---|---|
| Model number | 94028965 |
| Model name / series | 16VORK-S2 |
| Pump type | Above-Ground Filter Pump |
| Motor speed design | Multi-speed |
| Motor construction | Electronically commutated (ECM) |
| Rated horsepower | 1.65 hp |
| Hydraulic horsepower | 0.735 hhp |
| Weighted Energy Factor (WEF) | 9.10 kgal/kWh |
| Federal minimum WEF for this pump | 4.16 kgal/kWh |
| Better than federal minimum | 119% |
| Low-flow test point flow | 33.0 gpm |
| Low-flow test point head | 8.8 ft |
| Low-flow test point speed | 1,600 rpm |
| Low-flow test point power | 143 W |
| Freeze protection | No |
| Connected functionality | No |
Safety information
- Pool pump wiring must be installed by a qualified electrician in accordance with the National Electrical Code (Article 680) and local codes, including GFCI protection and a disconnect within sight of the pump.
- Connect the pump's bonding lug to the pool's equipotential bonding grid with a solid copper conductor (at least 8 AWG). Bonding reduces shock hazards in and around the water; never remove it.
- Turn off power at the breaker before servicing the pump, and wait for the time stated on the label before touching the drive of a variable-speed motor.
- Before opening the strainer lid or the filter, turn the pump off and open the filter's air-relief valve to release pressure. A filter or lid opened under pressure can separate violently.
- Never operate the pool with missing, broken or loose drain or suction-outlet covers. Suction can trap hair, limbs or bodies; know where the pump's emergency shut-off is.
- Never run the pump dry. Running without water destroys the shaft seal and can melt plastic housings.
- Store pool chemicals away from the pump and motor, and never add chemicals directly into the skimmer while the pump is running unless the product label says it is safe.
Installation and first-time setup
How the Orka 94028965 is plumbed and programmed matters as much as its rating. Use these steps as a checklist with your pool professional.
- Mount below the water level
Non-self-priming pumps must sit below the pool's water level so water flows into the pump by gravity (flooded suction). Place it on a level, solid base near the pool, out of standing water.
- Plumbing
Use the pipe size the manufacturer recommends, keep elbows to a minimum and leave a straight run of pipe ahead of the pump inlet. Lower plumbing resistance (head) means more flow per watt. Install unions and valves so the pump can be isolated and removed.
- Electrical
Confirm the supply voltage matches the pump's nameplate and any voltage selection on the motor, provide GFCI protection, and connect the bonding conductor. Ask the electrician to tighten and inspect all connections at start-up.
- Prime the pump
Fill the strainer housing with water, seal the lid, open the suction and return valves and start the pump. Open the filter's air-relief valve until a steady stream of water appears. A non-self-priming pump should fill and run almost immediately.
- Program speeds and schedules
Set a daily schedule with long periods at low speed for filtration and short periods at higher speed only where needed. Check the minimum flow required by a heater, salt chlorine generator, suction cleaner or spa spillover, and set those speeds just high enough to satisfy them.
Using your pool pump
How long to run the pump
Most residential pools are circulated at about one full turnover (the pool's volume) per day, adjusted for bather load, debris and water clarity. With this pump, achieve that turnover over more hours at low speed rather than fewer hours at high speed.
For example, at its low-speed test-point flow of 33.0 gpm, turning over a 20,000-gallon pool would take about 10.1 hours and use about 1.4 kWh. Real plumbing usually has more resistance than the test point, so measure your actual flow if your system has a flow meter.
Choosing speeds
Use low speed for everyday filtration and high speed only for vacuuming, suction cleaners, heater operation if required, or spa and water features.
Care and maintenance
| When | What to do |
|---|---|
| Weekly | Empty the pump strainer basket and skimmer baskets. A clogged basket starves the pump of water and can damage the seal. |
| Monthly | Inspect the strainer-lid O-ring; clean it and apply a silicone-based lubricant (not petroleum jelly). Look for drips under the pump and air in the strainer. |
| When filter pressure rises 8–10 psi above clean | Backwash or clean the filter. A dirty filter forces the pump to work harder and reduces flow. |
| Every season | Keep leaves, mulch and debris away from the motor's cooling vents, and check that the bonding wire is still attached. |
| Before freezing weather | Drain the pump and hoses, and store the pump indoors for the winter. |
| Every year | Have connections and the motor checked; replace the shaft seal at the first sign of leaking between the pump and motor. |
Troubleshooting
Most pump problems trace back to air leaks, low water or blocked baskets. Always turn off power before opening the pump.
| Problem | Possible cause | What to try |
|---|---|---|
| Pump will not prime | Low water level; air leak on the suction side (lid O-ring, unions, valves); clogged basket or impeller; closed valve. | Top up the pool, clean and lubricate the lid O-ring, check valves and unions, and clear the basket and impeller. |
| Air bubbles in the strainer or returns | Suction-side air leak; water level below the skimmer opening. | Tighten unions, replace a worn lid O-ring and raise the water level. |
| Low flow with high filter pressure | Dirty filter; partially closed return valve. | Backwash or clean the filter and check return valves. |
| Low flow with low filter pressure | Clogged skimmer, strainer basket or impeller; suction blockage. | Empty baskets and check the impeller for debris with the power off. |
| Gravelly or rattling noise | Cavitation from restricted suction or a speed set too high for the plumbing. | Clear suction blockages and lower the speed. |
| High-pitched squeal or grinding | Worn motor bearings. | Turn the pump off and have the motor serviced or replaced. |
| Water leaking between pump and motor | Worn shaft seal. | Replace the seal promptly so water does not reach the motor bearings. |
| Drive shows an error or the pump will not start | Drive fault, overheating, voltage problem or a programmed schedule off period. | Check the schedule and the code shown; look up the code in your manufacturer's manual. |
Energy use and running costs
Assume a 20,000-gallon pool circulated at one full turnover a day, 365 days a year (7,300 thousand gallons pumped). At its WEF of 9.10, the Orka 94028965 would use about 802 kWh per year — roughly $136 at $0.17 per kWh.
| Pump | WEF | Energy | Cost |
|---|---|---|---|
| This model | 9.10 | 802 kWh | $136 |
| Pump at the federal minimum | 4.16 | 1,755 kWh | $298 |
A pool open only six months a year would use about half these amounts. WEF reflects the DOE test schedule, which weights most operating hours at low speed; your actual use depends on your schedule, plumbing resistance, filter condition and equipment such as heaters or cleaners that need higher flow.
Frequently asked questions
What is the WEF rating of the Orka 94028965?
The Orka 94028965 has a Weighted Energy Factor of 9.10 thousand gallons per kWh, compared with a federal minimum of 4.16 for its type and size — about 119% better.
How much does it cost to run the Orka 94028965?
Circulating a 20,000-gallon pool once a day all year would take about 802 kWh, or about $136 at $0.17/kWh. A seasonal pool would use proportionally less.
Is the Orka 94028965 a variable-speed pump?
No. It is a multi-speed pump, so you can choose between preset speeds for filtration and higher-flow tasks.
What horsepower is the Orka 94028965?
It has a rated horsepower of 1.65 hp and a hydraulic horsepower of 0.74 hhp — the actual water-moving power at full speed on DOE reference curve C, which determines its federal efficiency class.
How much water does the Orka 94028965 pump?
At its low-speed test point it moves 33.0 gpm using 143 W. Actual flow depends on your pipe size, filter and fittings.
Does the Orka 94028965 have freeze protection?
Built-in freeze protection is not listed for this model. In freezing climates, use an automation system with freeze protection or winterize the equipment.
Is the Orka 94028965 ENERGY STAR certified?
Yes. It appears on the ENERGY STAR certified pool pump list, with a certification date of October 2021.
Sources and disclaimer
Specifications on this page come from the ENERGY STAR certified pool pumps dataset published by the U.S. Environmental Protection Agency (record certified October 20, 2021), retrieved October 7, 2026.
The setup, operating, maintenance and troubleshooting guidance is written by ManualHarbor's editors for this specific product type and configuration. It is an independent guide — not a reproduction of the manufacturer's manual — and ManualHarbor is not affiliated with Orka. Always follow the safety instructions, installation requirements and warranty terms supplied with your unit, and contact Orka or an authorized service provider for warranty repairs and replacement parts.
Running-cost figures use assumed U.S. average utility prices and are estimates for comparison only. See our editorial methodology for details.
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