---
product_id: 305880718
title: "24850-0008 Tank O-Ring for Pentair Sta-Rite System 3 S7D75, S7M120, S7M400, S7MD60, S7MD72, S7S50 Filters, O-485"
brand: "liberty pool products"
price: "S$34"
currency: SGD
in_stock: true
url: https://www.desertcart.sg/products/305880718-24850-0008-tank-o-ring-for-pentair-sta-rite-system
store_origin: SG
region: Singapore
---

# 21" inside diameter precision Universal fit for multiple Sta-Rite models Durable cross-section 1/2" seal 24850-0008 Tank O-Ring for Pentair Sta-Rite System 3 S7D75, S7M120, S7M400, S7MD60, S7MD72, S7S50 Filters, O-485

**Brand:** liberty pool products
**Price:** S$34
**Availability:** ✅ In Stock

## Summary

> 🛠️ Seal your system with confidence—because every drop counts!

## Quick Answers

- **What is this?** 24850-0008 Tank O-Ring for Pentair Sta-Rite System 3 S7D75, S7M120, S7M400, S7MD60, S7MD72, S7S50 Filters, O-485 by liberty pool products
- **How much does it cost?** S$34 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/305880718-24850-0008-tank-o-ring-for-pentair-sta-rite-system)

## Best For

- liberty pool products enthusiasts

## Why This Product

- Trusted liberty pool products brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Maintenance Made Easy:** Quick install design keeps your filtration system running smoothly without downtime.
- • **Robust Seal Integrity:** Half-inch cross-section guarantees a resilient, long-lasting tank seal.
- • **Versatile Compatibility:** Seamlessly fits a wide range of Pentair Sta-Rite System 3 filters—S7D75 to S7S50 models.
- • **Trusted Cross-References:** Compatible with multiple OEM part numbers for effortless replacement.
- • **Precision Fit, Zero Hassle:** Engineered for exact 21" inside diameter to ensure leak-proof performance.

## Overview

The 24850-0008 Tank O-Ring is a precision-engineered replacement seal designed for Pentair Sta-Rite System 3 filters, featuring a 21" inside diameter and 1/2" cross-section. Compatible with multiple filter models and OEM part numbers, it ensures a durable, leak-proof fit to maintain optimal filtration performance.

## Description

24850-0008 Tank O-Ring for Pentair Sta-Rite System 3 S7D75, S7M120, S7M400, S7MD60, S7MD72, S7S50 Filters, O-485 Part Description: Tank O-ring for Sta-Rite System 3 D.E. and sand filter models S7D75, S7M120, S7M400, S7MD60, S7MD72, S7S50 Inside Diameter: 21" Outside Diameter: 22" Cross Section: 1/2" Cross Reference: 24850-0008, 248500008, APCO2311, O-485, STA1012821, 90-423-1485, ALDO-485-0, STA-051-2809

## Features

- 24850-0008 Tank O-Ring for Pentair Sta-Rite System 3 S7D75, S7M120, S7M400, S7MD60, S7MD72, S7S50 Filters, O-485
- Part Description: Tank O-ring for Sta-Rite System 3 D.E. and sand filter models S7D75, S7M120, S7M400, S7MD60, S7MD72, S7S50
- Inside Diameter: 21"
- Outside Diameter: 22"
- Cross Section: 1/2"
- Cross Reference: 24850-0008, 248500008, APCO2311, O-485, STA1012821, 90-423-1485, ALDO-485-0, STA-051-2809

## Product Details

- **Material:** Rubber
- **Nominal Inside Diameter:** 21 Inches
- **Item Diameter:** 22 Inches
- **Brand:** Liberty Pool Products
- **Nominal Outside Diameter:** 22 Inches

## Images

![24850-0008 Tank O-Ring for Pentair Sta-Rite System 3 S7D75, S7M120, S7M400, S7MD60, S7MD72, S7S50 Filters, O-485 - Image 1](https://m.media-amazon.com/images/I/61LoA+YyriL.jpg)
![24850-0008 Tank O-Ring for Pentair Sta-Rite System 3 S7D75, S7M120, S7M400, S7MD60, S7MD72, S7S50 Filters, O-485 - Image 2](https://m.media-amazon.com/images/I/51YKwu41t+L.jpg)

## Questions & Answers

**Q: I’m seeing mixed reviews and need to know if this is a genuine pentair sta-rite o-ring for an s7m120 system.  the cross section dimension is critical.**
A: It worked fine for me

**Q: will this fit sta rite plde36 filter tank?**
A: SwimquipTM (24850-0008) Sand Tank O-ring System 3
Model S7S50/S7M120/S7D75

**Q: is there a top and bottom to this o ring, or same on each side?**
A: NO ITS THE SAME ROUND O-RING. - THANKS

## Frequently Bought Together

- 24850-0008 Tank O-Ring for Pentair Sta-Rite System 3 S7D75, S7M120, S7M400, S7MD60, S7MD72, S7S50 Filters, O-485
- Pentair WC8-126Z Air Bleed Replacement Kit Sta-Rite Pool and Spa Filter
- ATIE Black 1-1/2" Threaded Pool Filter Drain Plug Cap Winterizing Plug SP1022CBLK, 86202000, 190030, 27001-0022 with O-Ring for Pentair, Hayward, Sta-Rite Pool Filter Darin Plug (2 Pack)

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*Product available on Desertcart Singapore*
*Store origin: SG*
*Last updated: 2026-02-26*