Product Overview
This manual provides instructions for the installation and maintenance of the Aftermarket Replacement Skimmer Door Weir Flap, designed for use with SwimQuip U3, Hayward SP1070, and SPX1070KHR skimmer models. This component is crucial for maintaining pool cleanliness by preventing debris from re-entering the pool when the pump is off.

This image displays the white skimmer weir door flap, designed for pool skimmers. It features a spring-loaded mechanism and a foam float along its bottom edge, which helps it to close and retain debris when the pump is off. The overall dimensions are approximately 8-3/8 inches in width.
Setup and Installation
Follow these steps for proper installation of the skimmer weir door:
- Turn off the pump and filter: Ensure all pool circulation equipment is powered down. This prevents water movement and allows for easier access to the skimmer.
- Remove the skimmer lid: Access the interior of the skimmer from the top opening.
- Insert the weir door: Reach into the skimmer and insert the spring-loaded weir door at the lower bottom position. This is typically where the pool tile meets the skimmer throat.
- Orient the weir correctly: Ensure the flat side of the weir is facing upwards and the foam float is facing downwards, towards the skimmer basket.
- Align and secure: Align the weir within the skimmer throat. Prior to pulling the pin release handle, ensure it is positioned correctly. Pull the pin release handle to extend the pins, securing the weir door against the skimmer walls.
- Reposition if necessary: You may need to slightly reposition the weir to ensure it swivels freely and touches the upper bumper stop built into the skimmer when it closes.
- Restore power and check: Turn the pump and filter back on. Observe the water flow into the skimmer. When the pump shuts off, the weir door should close, effectively keeping debris inside the skimmer's throat from re-entering the pool. Adjust the weir's position if needed to achieve proper closure.
Operating Instructions
The skimmer weir door operates automatically with your pool's filtration system. When the pump is running, the water flow will push the weir door open, allowing water and surface debris to enter the skimmer basket. When the pump is turned off, the foam float on the weir door will cause it to close, trapping collected debris within the skimmer and preventing it from floating back into the pool.
Maintenance
- Regular Inspection: Periodically inspect the weir door for any signs of wear, cracks, or damage. Ensure the foam float is intact and not waterlogged.
- Cleanliness: Keep the skimmer throat and the weir door free of excessive debris buildup, which can impede its movement.
- Smooth Operation: Verify that the weir door opens and closes smoothly without sticking. If it sticks, check for obstructions or misalignment.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Weir door does not close fully when pump is off. |
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| Weir door sticks when opening or closing. |
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Specifications
- Product Type: Skimmer Weir Door Flap
- Compatibility: Hayward SP1070, Swimquip U3, SPX1070KHR skimmers
- Dimensions: Approximately 8-3/8 inches wide
- Package Dimensions: 10 x 6 x 3 inches
- Item Weight: 8 ounces
- Material: Durable plastic with foam float
Warranty Information
Specific warranty details for this aftermarket replacement part are not provided in the product information. Please refer to the seller or manufacturer for any applicable warranty policies.
Support
For further assistance or inquiries regarding this product, please contact the seller or the original manufacturer of your pool skimmer system.





