---
product_id: 85704805
title: "Fluidmaster 502P21 Adjust-A-Flush Flapper"
brand: "fluidmaster"
price: "5037 kr"
currency: ISK
in_stock: true
reviews_count: 10
category: "Fluidmaster"
url: https://www.desertcart.is/products/85704805-fluidmaster-502p21-adjust-a-flush-flapper
store_origin: IS
region: Iceland
---

# Fluidmaster 502P21 Adjust-A-Flush Flapper

**Brand:** fluidmaster
**Price:** 5037 kr
**Availability:** ✅ In Stock

## Quick Answers

- **What is this?** Fluidmaster 502P21 Adjust-A-Flush Flapper by fluidmaster
- **How much does it cost?** 5037 kr with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.is](https://www.desertcart.is/products/85704805-fluidmaster-502p21-adjust-a-flush-flapper)

## Best For

- fluidmaster enthusiasts

## Why This Product

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

## Description

Fluidmaster Performax Flapper Microban

Review: Simple Fix That Stopped Double Flushing Instantly - This flapper solved a problem I didn’t even realize was being caused by the old one. Our toilet was essentially flushing twice every time, wasting water and driving me crazy. Once this Fluidmaster Adjust-A-Flush flapper was installed, the problem disappeared immediately. The adjustability makes a real difference, and you can tell it’s well made. My plumber recommended this model, and he made a great call quick install, perfect seal, and consistent flushes every time. If your toilet is running, over-flushing, or just not acting right, this is an easy and inexpensive fix that actually works. Highly recommend.
Review: 2-pack was pictured in ad, I ordered 1 - 2 pack, but received 1 pack - Great product, with dial to adjust time flapper ball is raised (allowing water to flow) during flush. Effectively, you can use more or less water to flush (up to the amount of water in the toilet tank)

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B07857NT2J |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #176,151 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #137 in Toilet Flappers |
| Brand | Fluidmaster |
| Customer Reviews | 4.4 4.4 out of 5 stars (66) |
| Date First Available | December 2, 2017 |
| Installation Type | Floor Mounted |
| Is Discontinued By Manufacturer | No |
| Item Weight | 1.76 ounces |
| Item model number | 502P21-2PK |
| Manufacturer | Fluidmaster Inc |
| Material | Plastic |
| Part Number | Fluidmaster-502P21-2PK |
| Product Dimensions | 1.5 x 6 x 6 inches |
| Seat Material Type | Plastic |
| UPC | 603784909936 |

## Product Details

- **Brand:** Fluidmaster
- **Installation Type:** Floor Mounted
- **Item Weight:** 1.76 ounces
- **Material:** Plastic
- **Seat Material Type:** Plastic

## Images

![Fluidmaster 502P21 Adjust-A-Flush Flapper - Image 1](https://m.media-amazon.com/images/I/412firLugyL.jpg)
![Fluidmaster 502P21 Adjust-A-Flush Flapper - Image 2](https://m.media-amazon.com/images/I/416Pr5A5XqL.jpg)
![Fluidmaster 502P21 Adjust-A-Flush Flapper - Image 3](https://m.media-amazon.com/images/I/41uvX0rxRgL.jpg)
![Fluidmaster 502P21 Adjust-A-Flush Flapper - Image 4](https://m.media-amazon.com/images/I/51YhEDqnWNL.jpg)
![Fluidmaster 502P21 Adjust-A-Flush Flapper - Image 5](https://m.media-amazon.com/images/I/51weLEXFEtL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Simple Fix That Stopped Double Flushing Instantly
*by B***I on January 7, 2026*

This flapper solved a problem I didn’t even realize was being caused by the old one. Our toilet was essentially flushing twice every time, wasting water and driving me crazy. Once this Fluidmaster Adjust-A-Flush flapper was installed, the problem disappeared immediately. The adjustability makes a real difference, and you can tell it’s well made. My plumber recommended this model, and he made a great call quick install, perfect seal, and consistent flushes every time. If your toilet is running, over-flushing, or just not acting right, this is an easy and inexpensive fix that actually works. Highly recommend.

### ⭐⭐⭐⭐ 2-pack was pictured in ad, I ordered 1 - 2 pack, but received 1 pack
*by D***T on June 9, 2022*

Great product, with dial to adjust time flapper ball is raised (allowing water to flow) during flush. Effectively, you can use more or less water to flush (up to the amount of water in the toilet tank)

### ⭐⭐⭐⭐⭐ Flush without worrying.
*by J***S on January 30, 2026*

Great product. Great price. Very easy to install. Great fit and great seal.

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**Shop now:** [https://www.desertcart.is/products/85704805-fluidmaster-502p21-adjust-a-flush-flapper](https://www.desertcart.is/products/85704805-fluidmaster-502p21-adjust-a-flush-flapper)

---

*Product available on Desertcart Iceland*
*Store origin: IS*
*Last updated: 2026-02-21*