Hayward W3S166T ProSeries Sand Filter User Manual

1. Introduction

The Hayward ProSeries 16-inch Top-Mount Sand Filter is designed to provide efficient and reliable filtration for above-ground pools, on-ground pools, small in-ground pools, aquariums (salt or freshwater), and ponds. Its robust construction and advanced features ensure sparkling clear water and long-lasting performance.

Key Features:

• Durable corrosion-proof materials for dependable all-weather performance.
• Precision-engineered umbrella-fold self-cleaning lateral system for efficient flow and balanced backwashing.
• 7-position VariFlo valve for maximum flow at lower pressure drop.
• Large pressure sand/water drain for rapid winterizing or servicing.
• Integral top diffuser ensures even distribution of water over the entire sand bed for maximum use of the filtration area.

Figure 1.1: Hayward W3S166T ProSeries Sand Filter. This image shows the complete sand filter unit with its top-mounted valve and pressure gauge.

Figure 1.2: Key features of the Hayward ProSeries Sand Filter. This image highlights that the filter is designed for above-ground pools, includes a 1.5-inch multiport valve, and requires 100 lbs of sand.

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2. Important Safety Information

Please read and understand all instructions before installing, operating, or maintaining this product. Failure to follow these instructions could result in serious injury or death.

• WARNING: Do not stand or climb on the filter.
• CAUTION: Always shut off the pump before changing the position of the VariFlo valve. Failure to do so can damage the valve and/or the filter.
• Ensure all electrical connections are made by a qualified electrician and comply with local codes.
• Keep children away from the filter system during operation.
• Do not operate the filter if any part is damaged or missing.
• Protect the filter from freezing temperatures during winter months.

3. Setup and Installation

Proper installation is crucial for the optimal performance and longevity of your Hayward ProSeries Sand Filter. While the process can be straightforward, professional installation is recommended to ensure correct plumbing and setup.

3.1. Site Selection:

• Choose a level, firm surface, preferably concrete, close to your pool.
• Ensure adequate drainage for backwash water.
• Allow sufficient space around the filter for servicing and maintenance.

3.2. Loading Filter Media (Sand):

1. Remove the VariFlo valve and internal pipe assembly from the filter tank.
2. Cover the internal pipe opening with a plastic cap or tape to prevent sand from entering.
3. Carefully pour the recommended amount of filter sand (approximately 100 lbs for this model) into the tank. Ensure the sand is evenly distributed.
4. Remove the cap/tape from the internal pipe.

3.3. Connecting Plumbing:

1. Attach the VariFlo valve to the top of the filter tank, ensuring a secure and watertight seal.
2. Connect the pump to the "PUMP" port on the valve.
3. Connect the return line to the pool to the "RETURN TO POOL" port.
4. Connect a backwash hose (not included) to the "WASTE" port for draining backwash water.
5. Ensure all connections are tight and leak-free. Teflon tape may be required for threaded connections.

Note: This unit does not come with all necessary pipe connectors or a backwash hose. These items must be purchased separately.

4. Operating the VariFlo Valve

The 7-position VariFlo valve allows for various operational modes. IMPORTANT: Always shut off the pump before changing the position of the valve handle.

To change the valve position, press down on the handle and rotate it to the desired setting. Release the handle to lock it in place.

5. Maintenance

5.1. Backwashing and Rinsing:

Backwashing is the primary method for cleaning your sand filter. It should be performed when the pressure gauge reading increases by 6-8 PSI (0.4-0.5 BAR) above its clean operating pressure, or when the pool water appears cloudy.

1. Turn off the pool pump.
2. Set the VariFlo valve to the BACKWASH position.
3. Turn on the pump and backwash for 2-3 minutes, or until the water flowing out of the waste line is clear (visible through the sight glass).
4. Turn off the pump.
5. Set the VariFlo valve to the RINSE position.
6. Turn on the pump and rinse for 30-60 seconds to re-seat the sand bed.
7. Turn off the pump.
8. Set the VariFlo valve back to the FILTER position.
9. Turn on the pump to resume normal filtration.

5.2. Winterizing:

To prevent damage from freezing, the filter system must be properly winterized.

1. Lower the pool water level below the skimmer and return lines.
2. Turn off the pump and disconnect it from power.
3. Set the VariFlo valve to the WINTER position.
4. Remove the drain cap at the bottom of the filter tank to allow all water to drain.
5. Store the drain cap in the pump strainer basket for safekeeping.
6. Disconnect all hoses and pipes from the filter and pump. Ensure all water is drained from the system.
7. Store the pump and filter in a dry, protected area if possible. If left outdoors, cover them with a tarp to protect from elements.

5.3. Sand Replacement:

Filter sand typically lasts for approximately 5 years before needing replacement. Replace the sand if filtration efficiency decreases significantly despite regular backwashing.

6. Troubleshooting

For issues not listed or if problems persist, contact Hayward customer support.

7. Product Specifications

8. Warranty and Customer Support

Hayward products are manufactured to the highest standards of quality and workmanship. For specific warranty details regarding your W3S166T ProSeries Sand Filter, please refer to the warranty card included with your product or visit the official Hayward website.

If you require technical assistance, have questions about installation, operation, or maintenance, or need to report a defect, please contact Hayward Customer Support. Contact information can typically be found on the Hayward website or in your product packaging.

For additional resources and product information, visit the Hayward Store on Amazon.