---
product_id: 517476916
title: "M20521 Toilet Cistern Inlet Valve G3/8 Inch – Bottom or Side Entry | Float Valve For Toilet Cistern, Brass Nut Connection, Check Inlet Size Before Purchase(16mm)"
brand: "ibergrif"
price: "31419CFA"
currency: XOF
in_stock: true
reviews_count: 13
category: "Ibergrif"
url: https://www.desertcart.sn/products/517476916-m20521-toilet-cistern-inlet-valve-g3-8-inch-bottom-side
store_origin: SN
region: Senegal
---

# Dual bottom/side inlet design G3/8 inch precision thread 100,000-cycle brass nut durability M20521 Toilet Cistern Inlet Valve G3/8 Inch – Bottom or Side Entry | Float Valve For Toilet Cistern, Brass Nut Connection, Check Inlet Size Before Purchase(16mm)

**Brand:** ibergrif
**Price:** 31419CFA
**Availability:** ✅ In Stock

## Summary

> 🚽 Upgrade your flush game with precision and durability!

## Quick Answers

- **What is this?** M20521 Toilet Cistern Inlet Valve G3/8 Inch – Bottom or Side Entry | Float Valve For Toilet Cistern, Brass Nut Connection, Check Inlet Size Before Purchase(16mm) by ibergrif
- **How much does it cost?** 31419CFA with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sn](https://www.desertcart.sn/products/517476916-m20521-toilet-cistern-inlet-valve-g3-8-inch-bottom-side)

## Best For

- ibergrif enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Premium ABS body paired with brass hex nuts guarantees rugged durability and leak-free performance.
- • **Effortless Setup:** User-friendly design makes installation quick and hassle-free—even for first-timers.
- • **Clean & Efficient:** Integrated filter net traps impurities, protecting your system and enhancing flush quality.
- • **Versatile Installation:** Fits both bottom and side inlet toilets for seamless upgrades or replacements.
- • **Precision Water Control:** Adjustable float valve height with 5mm increments ensures perfect water levels every flush.

## Overview

The Ibergrif M20521 Toilet Cistern Inlet Valve features a G3/8 inch thread size compatible with most dual flush systems, supporting both bottom and side inlet installations. Crafted from premium ABS with brass fastening nuts, it offers exceptional durability rated for 100,000 cycles. Its adjustable float valve allows precise water level control, while an integrated filter ensures clean water flow. Designed for easy installation and reliable, quiet operation, this valve is a smart, long-lasting upgrade for modern toilets.

## Description

From the manufacturer Maximize toilet performance and save water! About Ibergrif Ibergrif is one of the leading manufacturers and suppliers of sanitary ware in Spain. With an uncompromising dedication to quality and a passion for lifestyle, we are producing products that perfectly meet to the needs and lifestyles of our customers. It is our goal to help customers live a more beautiful and affordable life. Find inspiration for your kitchen and bathroom with Ibergrif! Long-life Easy to install Plastic & Brass Tight seal, adjustable height, strong flush! The IBERGRIF M20521 bottom/side inlet valve is a cost-effective and reliable solution. This valve features a G3/8-inch thread (16 mm) and an adjustable float valve height, compatible with both bottom and side inlet toilet tanks. Bottom and side entry cisterns Adjustable water level Brass threading instead of plastic threading Bottom fill valve Inlet pipe with filter design, can effectively filter impurities in water. With side inlet The bottom inlet can be used if the side inlet is screwed. If the bottom inlet is screwed, water can be fed through the side. Buoy regulation Adjust the buoy height to accurately control the water level, 5mm per scale. Adjustable rod Water speed can be controlled by rotating adjusting lever. Brass threading Hexagon fastening nuts with brass interface, compared with plastic threading, increase longer service life. Very convenient Easy to install and use, even girls can handle it. Durable seal, robust design & Unique innovative water cut-off structure fix slow, noise, leak.

Review: Does the job. - Slightly fiddly getting it just right but very effective, quiet and adjustable. Well designed and can work around awkward cisterns.
Review: Good service - Good product

## Features

- Special note: The interface size of this product is G3/8 inches (16mm in diameter), not G1/2 inches. Please make sure the interface is compatible before purchasing.
- Two installation methods: Compared with traditional water tank inlet valves, we can support bottom or side inlet valves, suitable for integrated or two-piece toilets.
- Adjustable Height: Equipped with the main body latch, can adjust the water lavel, compatible with most dual flush toilet systems.
- Effective Clean: The inlet adopts the filter net to effectively filter the impurities in the water.
- Premium Material: Made of premium ABS material, rugged and durable, hexagon fastening nut made of brass material, the life has increased to 100,000 times.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0BKSQ5VN1 |
| Best Sellers Rank | 80,119 in DIY & Tools ( See Top 100 in DIY & Tools ) 92 in Toilet Tanks |
| Brand | Ibergrif |
| Connector Type | Slip |
| Country of Origin | España |
| Customer Reviews | 4.1 out of 5 stars 3,164 Reviews |
| Exterior Finish | Brass |
| Exterior finish | Brass |
| Included Components | 1*toilet cistern fill valve 1* Water pipe 1*Instruction Sheet |
| Inlet Connection Size | 0.38 Inches |
| Inlet Connection Type | Tip solder at |
| Inlet connection size | 0.38 Inches |
| Inlet connection type | Tip solder at |
| Item Dimensions | 24.5 x 12.2 x 6.3 centimetres |
| Item Type Name | toilet cistern fill valve |
| Item dimensions L x W x H | 24.5 x 12.2 x 6.3 centimetres |
| Manufacturer | Ibergrif Griferias SL |
| Material | Acrylonitrile Butadiene Styrene (ABS) |
| Maximum Pressure | 16 Bars |
| Model Number | M20521 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Number of Pieces | 1 |
| Number of Ports | 1 |
| Outlet Connection Size | 0.38 Inches |
| Outlet Connection Type | G Connector |
| Part Number | M20521 |
| Set Name | Multi Color |
| Size | 13.3 cm x 28.5 cm x 6.9 cm |
| Specification Met | CE, ISI |
| Thread Size | M13-17 |
| Thread Type | Metric, Pipe |
| Unit Count | 1.0 count |
| Valve Type | Float Valve |

## Product Details

- **Brand:** Ibergrif
- **Exterior finish:** Brass
- **Inlet connection size:** 0.38 Inches
- **Inlet connection type:** Tip solder at
- **Item dimensions L x W x H:** 28.5 x 13.3 x 6.9 centimetres
- **Material:** Acrylonitrile Butadiene Styrene (ABS)
- **Maximum operating pressure:** 16 Bars
- **Number of ports:** 1
- **Outlet connection size:** 0.38 Inches
- **Outlet connection type:** Barb

## Images

![M20521 Toilet Cistern Inlet Valve G3/8 Inch – Bottom or Side Entry | Float Valve For Toilet Cistern, Brass Nut Connection, Check Inlet Size Before Purchase(16mm) - Image 1](https://m.media-amazon.com/images/I/61pN3q+ulsL.jpg)

## Available Options

This product comes in different **Style** options.

## Questions & Answers

**Q: Is this suitable for high pressure?**
A: we have a high pressure water in our house and seems to work fine.

**Q: How long is the cable length?**
A: I didn't measure it but probably about 15cm.
Long enough to reach standard systern fitting.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Does the job.
*by 6***0 on 10 April 2026*

Slightly fiddly getting it just right but very effective, quiet and adjustable. Well designed and can work around awkward cisterns.

### ⭐⭐⭐⭐⭐ Good service
*by M***S on 13 March 2026*

Good product

### ⭐⭐⭐⭐ Good quality
*by R***E on 9 July 2023*

Didn't fit my old existent system, but seems to be good quality

## Frequently Bought Together

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- SPARES2GO Toilet Cistern Seal Kit 100mm M6 Bolt Through 1.5" Rubber Dome 2" Foam Washer Set

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*Product available on Desertcart Senegal*
*Store origin: SN*
*Last updated: 2026-08-13*