Pool filter flap doors, or weir gates, are essential for keeping debris out of the pool’s filtration system while allowing smooth water flow. This guide highlights five reliable options designed to fit common skimmer models, ensuring a secure seal, durable construction, and easy maintenance. Each product section below explains fit, materials, and compatibility to help you choose the right replacement flap door for your pool system.
| Product | Brand | Key Fit | Material |
|---|---|---|---|
| Swimline Replacement HT/Oly Sturdy Skimmer Weir | Swimline Store | Hydro tools standard and wide mouth skimmers | Durable plastic |
| Exact Replacement 516252 White Weir Gate Assembly | — | Bermuda Gunite and Bermuda Skimmers | High-quality plastic |
| (2-Pack) Exact Replacement 08650-0022 Weir Gate Assembly | — | Sta-Rite U-3 Vinyl Liner Skimmer | Durable plastic |
| SPX1070KHR Swimming Pool Skimmer Weir Door Flap | — | Hayward SP1070 series and Swimquip U3 | Plastic |
| SP1070 Pool Skimmer Weir Flap Door | — | Hayward SP1070 family | Durable construction |
Swimline Replacement HT/Oly Sturdy Skimmer Weir

The Swimline replacement weir door is designed for Hydro tools standard and wide mouth pool filter skimmers. It fits models 8939, 8939A, 8940, and 89401, offering a high-quality option built to last. The part’s gendered tabs and hinge mechanism provide a reliable seal while permitting quick removal for cleaning. Durability is emphasized to withstand pool chemicals and UV exposure, reducing the need for frequent replacements.
Exact Replacement 516252 White Weir Gate Assembly

The Exact Replacement 516252 Weir Gate Assembly is a white plastic gate compatible with Bermuda Gunite and Bermuda Skimmers, including vinyl liner variants. Its 8.5 x 5.38 inch footprint aligns with standard measurements, featuring snap-on tabs and 1/8-inch pins that secure the gate in place. The design emphasizes longevity, heat resistance, and UV durability, offering compatibility with PacFab Bermuda parts as well. Verify compatibility by matching part numbers or skimmer models before purchase.
(2-Pack) Exact Replacement 08650-0022 Weir Gate Assembly

The 08650-0022 White Weir Gate Assembly is an exact replacement for Sta-Rite U-3 vinyl liner skimmers and Automatic Surface Skimmers. It measures 8.5 inches by 5.125 inches and uses a hinged design for smooth operation. This kit is offered in a 2-pack, delivering value for multi-skimmer pools. Users should confirm compatibility by measuring their current gate or checking the model numbers before purchasing. The hinges and plastic construction are optimized for temperature extremes and sunlight exposure.
SPX1070KHR Weir Door Flap for Hayward Skimmers

This SPX1070KHR replacement weir door is a brand-new part backed by a manufacturer warranty. Its dimensions are 8-3/8 inches in length by 5-1/4 inches in width with a thickness of 1-1/8 inches, designed to fit Hayward SP1070, SP1070-K, R240067, and related models. The part is engineered to endure pool chemicals and sun exposure without warping or cracking, providing a reliable seal for consistent skimming performance.
SP1070 Pool Skimmer Weir Flap Door

This SP1070 Pool Skimmer Weir Flap Door is compatible with Hayward SP1070-K, SP1070-D, SPX1070KHR, SP1070, SP1071, and SP10712S skimmers. It features a length of 8-7/16 inches, a width of 5-1/4 inches, and a thickness of 1-1/8 inches, ensuring a precise fit for many pool systems. The durable construction is designed to resist pool chemicals and UV exposure, contributing to long-term reliability and reduced maintenance.
Buying Guide
- Fit and compatibility: Always verify model numbers and measurements against your skimmer before ordering. Weir gate assemblies often rely on exact dimensions and hinge configurations to seal properly.
- Material durability: Look for high-quality plastic with UV resistance and temperature tolerance to prevent warping or cracking over time.
- Hinge design: Hinges should offer smooth operation and secure attachment to prevent leaks or misalignment during cleaning.
- Ease of installation: Replacements should feature straightforward installation with clear alignment and snap-in or screw-in attachments as needed.
- Vendor reliability: Choose replacements from brands or reputable sellers with documented compatibility notes and return policies.
- Maintenance considerations: A well-fitting weir gate improves skimmer efficiency, reducing debris buildup and extending the life of the pump and filter.
- Cost vs. frequency: While premium parts may cost more upfront, they can reduce maintenance frequency and provide better long-term value.