--- product_id: 306709840 title: "Swimming Pool Machine Knob Cover Rings 8 Pack" brand: "ar-pro" price: "฿748" currency: THB in_stock: false reviews_count: 13 category: "Ar Pro" url: https://www.desertcart.co.th/products/306709840-swimming-pool-machine-knob-cover-rings-8-pack store_origin: TH region: Thailand --- # Buna-N resists water & chemicals Fits 2.5" ID Hayward unions 8-pack for multiple fixes Swimming Pool Machine Knob Cover Rings 8 Pack **Brand:** ar-pro **Price:** ฿748 **Availability:** ❌ Out of Stock ## Summary > 💧 Seal the deal with confidence—never let a leak slow your summer vibe! ## Quick Answers - **What is this?** Swimming Pool Machine Knob Cover Rings 8 Pack by ar-pro - **How much does it cost?** ฿748 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.co.th](https://www.desertcart.co.th/products/306709840-swimming-pool-machine-knob-cover-rings-8-pack) ## Best For - ar-pro enthusiasts ## Why This Product - Trusted ar-pro brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Premium Buna-N Durability:** Crafted from high-resistance nitrile rubber to withstand water, oils, and pool chemicals effortlessly. - • **Cost-Effective Leak Solution:** Get 8 reliable O-rings for less than the price of one store-bought replacement—smart savings for smart managers. - • **Bulk Backup for Zero Downtime:** 8 O-rings per pack means you're always ready to fix leaks without delay. - • **DIY Pool Maintenance Made Easy:** Quick installation saves time and money compared to costly OEM parts—perfect for the savvy pool owner. - • **Precision Fit for Hayward T-Cells:** Engineered to match Hayward GLX-Union specs ensuring leak-proof performance on T-3 to T-15 models. ## Overview This 8-pack of aftermarket Buna-N O-rings is designed as a direct replacement for Hayward T-Cell salt chlorination unions, featuring a 2.5-inch inner diameter and 2.75-inch outer diameter. Made from durable nitrile rubber, these O-rings resist water, oils, and chemicals, providing a reliable, cost-effective solution to prevent leaks and maintain your pool’s performance with easy DIY installation. ## Description Buy (8-Pack) Salt Cell O-Ring Compatible with Hayward GLX-Cell-Union Buna-N for Turbo Cell Salt Chlorination Cell Union - Aftermarket T-Cell Union O-Rings: Pool & Spa Replacement Parts - desertcart.com ✓ FREE DELIVERY possible on eligible purchases Review: Smaller than the Hayward rings but they work just fine for us. - I like these because they're so much cheaper than when you get them in the store but they work! They are a bit smaller than the Hayward ones we purchased previously (at $45 apiece!!!!), so it takes some work to replace them properly. My husband is a builder (he built our pool) so he has no issues with them, but if you're not savvy with pool equipment this product could pose some difficulty. But for us it works just fine. Review: Stopped the leak - These fit perfectly and stopped the leak from the original o-ring getting pinched. Great price and now I have 7 more 0-rings in reserve when this one goes out. All for less than one from the pool supply store. I work on cars and other equipment so I'm no stranger to o-rings of all sizes. These feel as good as any other and even if they don't last as long it's still a great deal and I can just swap it without having to source one. I like having parts like this on hand so I don't have to drive to the store or wait for shipping. ## Features - REPLACEMENT SALT CELL UNION O-RING - These are compatible with Hayward part GLX-Union-O ring, with an inner diameter of 2.50 inches and an outer diameter of 2.75 inches. The pack include 8 O-rings, When the unexpected leak happens, you'll have more than enough to fix both ends of the cell union! - COMPATIBLE WIHT HAYWARD SALT CELL - These O-rings are an fit for cell unions of T-Cells for Hayward Goldline Salt Chlorine Generators (T-3, T-5, T-9, and T-15). Also compatible with Hayward Sense and Dispense P-Kit, AQL-CHEM-UPG, and AQL-SS-6B-BOX wireless remote control model. - BUNA-N O-RINGS FOR HAYWARD TURBO CELL SALT CHLORINATION CELL UNION - Nitrile rubber also known as NBR, Buna Nitrile, or Buna-N is the material of choice for O-rings. It has high resistance to water, oils, fuels, alcohol, and other chemicals. Aside from this, Buna-N also has high tensile strength and elasticity. - HIGH-QUALITY AFTERMARKET T-CELL UNION O-RINGS - Stop leaks coming from your T-Cell’s cell union. The installation process will only take a few minutes, but you’ll be able to enjoy the benefits for more than a year! O-rings may fail when you least expect them to. Choose these high-quality and durable O-rings and you’ll be able to make the most out of each of this pack’s 8 pieces of O-rings! - PLEASE READ: This replacement pack of cell union O-Rings for Hayward T-Cell Salt Chlorination cell unions is an aftermarket product produced by CalPalmy. It meets or exceeds the performance of OEM replacement parts (based on in-house testing). We do not have any affiliation with or endorsement from any of the manufacturers mentioned. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08K8SH9PR | | Best Sellers Rank | #42,367 in Patio, Lawn & Garden ( See Top 100 in Patio, Lawn & Garden ) #386 in Pool & Spa Replacement Parts | | Brand | AR-PRO | | Date First Available | September 28, 2020 | | EU Spare Part Availability Duration | 2 Years | | Item Diameter | 2.75 Inches | | Item Weight | 2.08 ounces | | Manufacturer | AR-PRO | | Material | Nitrile Rubber | | Nominal Inside Diameter | 2.5 Inches | | Nominal Outside Diameter | 2.75 Inches | | Number of Pieces | 8 | | UPC | 687368343026 | | Unit Count | 8 Count | ## Product Details - **Brand:** AR-PRO - **Item Diameter:** 2.75 Inches - **Material:** Nitrile Rubber - **Nominal Inside Diameter:** 2.5 Inches - **Nominal Outside Diameter:** 2.75 Inches ## Images ![Swimming Pool Machine Knob Cover Rings 8 Pack - Image 1](https://m.media-amazon.com/images/I/71OH0YQ+Q-L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ Smaller than the Hayward rings but they work just fine for us. *by T***A on September 7, 2025* I like these because they're so much cheaper than when you get them in the store but they work! They are a bit smaller than the Hayward ones we purchased previously (at $45 apiece!!!!), so it takes some work to replace them properly. My husband is a builder (he built our pool) so he has no issues with them, but if you're not savvy with pool equipment this product could pose some difficulty. But for us it works just fine. ### ⭐⭐⭐⭐⭐ Stopped the leak *by D***K on June 14, 2024* These fit perfectly and stopped the leak from the original o-ring getting pinched. Great price and now I have 7 more 0-rings in reserve when this one goes out. All for less than one from the pool supply store. I work on cars and other equipment so I'm no stranger to o-rings of all sizes. These feel as good as any other and even if they don't last as long it's still a great deal and I can just swap it without having to source one. I like having parts like this on hand so I don't have to drive to the store or wait for shipping. ### ⭐⭐⭐⭐⭐ Perfect fit *by А***R on July 11, 2025* Ordered to use on my Hayward chlorinator and it was a perfect fit. Price was excellent as well. --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.th/products/306709840-swimming-pool-machine-knob-cover-rings-8-pack](https://www.desertcart.co.th/products/306709840-swimming-pool-machine-knob-cover-rings-8-pack) --- *Product available on Desertcart Thailand* *Store origin: TH* *Last updated: 2026-04-26*