---
product_id: 732591126
title: "Fluidmaster 385 Toilet Replacement Cap Assembly for 400A Fill Valves, Black, 4.75 x 3.75 x 1.47 (Pack of 5)"
brand: "fluidmaster"
price: "7235 som"
currency: KGS
in_stock: true
reviews_count: 8
url: https://www.desertcart.kg/products/732591126-fluidmaster-385-toilet-replacement-cap-assembly-for-400a-fill-valves
store_origin: KG
region: Kyrgyzstan
---

# Optimized water control Universal 400A valve fit DIY-friendly install Fluidmaster 385 Toilet Replacement Cap Assembly for 400A Fill Valves, Black, 4.75 x 3.75 x 1.47 (Pack of 5)

**Brand:** fluidmaster
**Price:** 7235 som
**Availability:** ✅ In Stock

## Summary

> 🚽 Upgrade your flush game with sleek, leak-proof precision!

## Quick Answers

- **What is this?** Fluidmaster 385 Toilet Replacement Cap Assembly for 400A Fill Valves, Black, 4.75 x 3.75 x 1.47 (Pack of 5) by fluidmaster
- **How much does it cost?** 7235 som with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.kg](https://www.desertcart.kg/products/732591126-fluidmaster-385-toilet-replacement-cap-assembly-for-400a-fill-valves)

## Best For

- fluidmaster enthusiasts

## Why This Product

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

## Key Features

- • **Value Pack of 5:** Stock up and save with multiple caps for all your maintenance needs
- • **Quick DIY Installation:** User-friendly design with clear instructions—no plumber needed
- • **Efficient Leak Prevention:** Engineered to fix leaks and optimize water flow for savings
- • **Durable & Sleek Black Finish:** Built to last with a modern aesthetic that elevates your bathroom
- • **Seamless Universal Compatibility:** Fits all 400A fill valves for hassle-free upgrades

## Overview

The Fluidmaster 385 Toilet Replacement Cap Assembly is a durable, black-finished cap designed to fit 400A fill valves universally. Measuring 4.75 x 3.75 x 1.47 inches, it ensures efficient water control and leak prevention. Easy to install with DIY-friendly instructions, this pack of five offers long-lasting performance and modern style for your bathroom plumbing needs.

## Description

Fluidmaster 385 Toilet Replacement Cap Assembly for 400A Fill Valves, Black, 4. 75 x 3. 75 x 1. 47

## Features

- The information below is per-pack only
- Universal Compatibility: The Fluidmaster 385 Toilet Replacement Cap Assembly is designed to seamlessly replace the cap of 400A Fill Valves, ensuring compatibility with a wide range of toilets.
- Durable Construction: Crafted with precision and durability in mind, this replacement cap assembly is built to withstand the rigors of daily use, providing long-lasting performance and reliability.
- Enhanced Aesthetics: With its sleek black finish, the 4.75 x 3.75 x 1.47-inch cap assembly not only serves a functional purpose but also adds a touch of modern elegance to your bathroom.
- Efficient Water Control: Experience improved water control and efficient filling with the Fluidmaster 385. The cap assembly ensures optimal functioning of the 400A Fill Valve.
- DIY-Friendly Installation: Designed for easy installation, this replacement cap assembly comes with user-friendly instructions, making it a perfect choice for DIY enthusiasts.
- Includes seal
- Easily installs onto fill valve
- Fixes leaks at cap
- 1 year warranty

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Material | Metal, Plastic |
| Brand | Fluidmaster |
| Item dimensions L x W x H | 1.47 x 3.75 x 4.75 inches |
| Exterior Finish | Black |
| Inlet Connection Size | 1.5 Inches |
| Inlet Connection Type | NPT |
| Outlet Connection Type | NPT |
| Number of Ports | 2 |
| Outlet Connection Size | 1.5 Inches |
| Manufacturer | Fluidmaster, Inc. |
| Part Number | 385 |
| Item Weight | 3.2 ounces |
| Product Dimensions | 1.47 x 3.75 x 4.75 inches |
| Item model number | 385 |
| Is Discontinued By Manufacturer | No |
| Size | 4.75 x 3.75 x 1.47" (Pack of 5) |
| Color | Black |
| Style | Modern |
| Item Package Quantity | 1 |
| Batteries Included? | No |
| Batteries Required? | No |

## Product Details

- **Material:** Metal, Plastic
- **Brand:** Fluidmaster
- **Item dimensions L x W x H:** 1.47 x 3.75 x 4.75 inches
- **Exterior Finish:** Black
- **Inlet Connection Size:** 1.5 Inches
- **Inlet Connection Type:** NPT
- **Outlet Connection Type:** NPT
- **Number of Ports:** 2
- **Outlet Connection Size:** 1.5 Inches
- **Manufacturer:** Fluidmaster, Inc.

## Images

![Fluidmaster 385 Toilet Replacement Cap Assembly for 400A Fill Valves, Black, 4.75 x 3.75 x 1.47 (Pack of 5) - Image 1](https://m.media-amazon.com/images/I/51blaYiGXSL.jpg)
![Fluidmaster 385 Toilet Replacement Cap Assembly for 400A Fill Valves, Black, 4.75 x 3.75 x 1.47 (Pack of 5) - Image 2](https://m.media-amazon.com/images/I/61WjspvKM-L.jpg)
![Fluidmaster 385 Toilet Replacement Cap Assembly for 400A Fill Valves, Black, 4.75 x 3.75 x 1.47 (Pack of 5) - Image 3](https://m.media-amazon.com/images/I/51CqWpRJZnL.jpg)
![Fluidmaster 385 Toilet Replacement Cap Assembly for 400A Fill Valves, Black, 4.75 x 3.75 x 1.47 (Pack of 5) - Image 4](https://m.media-amazon.com/images/I/51DL8ne3jUL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Easy fix
*by J***C on November 3, 2023*

I googled the problem with my toilet. It brought up several Youtube videos. I watched each one until I heard the sound my toilet was making. Super easy fix, it took maybe 3 minutes.My only problem was the shipping. I requested next day delivery since the noise was awful and we had to turn the toilet water off every time after using it to stop the squealing. It didn't come the next day or the next. I finally got the part a week after ordering. I checked the UPS site tracking with the # given in the item shipped email. They had no record of that tracking number until 4 days later.

### ⭐⭐⭐⭐⭐ great replacement for the original piece
*by S***O on February 28, 2021*

The toilet in my apartment had always filled slowly but suddenly started almost not filling at all after flushing. Rather than call maintenance I took a look and figured out this little cap valve thingy was really busted and clogged with the seal breaking. I was going to try to just replace the little rubber seal but the close price difference for this entire cap assembly thing made it an easier choice. It takes less than a minute to install and my toilet is running like a champ, way better than I had expected. $5 later and no waiting or dealing with maintenance and I'm good to go.

### ⭐⭐⭐⭐⭐ WORKS BETTER THAN NEW
*by P***I on November 6, 2024*

I saw this and tried just replacing the "valve/head" of the unit... just turn off the water, twist off, twist on new and turn the water back on...You do NOT have to remove anything else...And it seems to work better than the original unit.

## Frequently Bought Together

- Fluidmaster 385 Toilet Replacement Cap Assembly for 400A Fill Valves, Black, 4.75 x 3.75 x 1.47 (Pack of 5)
- Fluidmaster 400H-002 Performax Universal Toilet Fill Valve High Performance Tank and Bowl Water Control, 1-Pack, Multicolor
- Korky 100BP Ultra High Performance Flapper Fits Most Toilets - Long Lasting Rubber - Easy to Install - Made in USA, Small, Red,1 Pack

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**Shop now:** [https://www.desertcart.kg/products/732591126-fluidmaster-385-toilet-replacement-cap-assembly-for-400a-fill-valves](https://www.desertcart.kg/products/732591126-fluidmaster-385-toilet-replacement-cap-assembly-for-400a-fill-valves)

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*Product available on Desertcart Kyrgyzstan*
*Store origin: KG*
*Last updated: 2026-05-07*