---
product_id: 10002356
title: "Regal A-38-A Water Closet Diaphragm Assembly Kit 3.5 GPF - Natural Rubber Diaphragm with Brass Bypass | For use with Regal Flushometers | OEM Sloan Parts, 3301038"
brand: "sloan"
price: "€ 45.22"
currency: EUR
in_stock: true
reviews_count: 13
category: "Sloan"
url: https://www.desertcart.gr/products/10002356-regal-a-38-a-water-closet-diaphragm-assembly-kit-3
store_origin: GR
region: Greece
---

# 3.5 GPF precise flush Durable brass bypass Natural rubber diaphragm Regal A-38-A Water Closet Diaphragm Assembly Kit 3.5 GPF - Natural Rubber Diaphragm with Brass Bypass | For use with Regal Flushometers | OEM Sloan Parts, 3301038

**Brand:** sloan
**Price:** € 45.22
**Availability:** ✅ In Stock

## Summary

> 🚽 Flush Smarter, Save Water, Lead the Change!

## Quick Answers

- **What is this?** Regal A-38-A Water Closet Diaphragm Assembly Kit 3.5 GPF - Natural Rubber Diaphragm with Brass Bypass | For use with Regal Flushometers | OEM Sloan Parts, 3301038 by sloan
- **How much does it cost?** € 45.22 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.gr](https://www.desertcart.gr/products/10002356-regal-a-38-a-water-closet-diaphragm-assembly-kit-3)

## Best For

- sloan enthusiasts

## Why This Product

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

## Key Features

- • **Premium Material Build:** Natural rubber diaphragm paired with a brass bypass ensures long-lasting durability and leak-free operation.
- • **Eco-Conscious Smart Design:** Limits water waste by preventing worn-out diaphragm issues, reducing costs and supporting green building goals.
- • **Precision Water Efficiency:** Optimized 3.5 gallons per flush for sustainable water savings without compromising performance.
- • **Seamless Regal Compatibility:** Engineered exclusively for Regal Flushometers, guaranteeing a hassle-free, perfect fit every time.
- • **Sloan Genuine Quality Assurance:** OEM part tested to Sloan’s highest standards, extending the life of your commercial restroom fixtures.

## Overview

The Sloan Regal A-38-A Water Closet Diaphragm Assembly Kit is a high-quality OEM replacement part designed for Regal Flushometers. Featuring a natural rubber diaphragm and brass bypass, it delivers a precise 3.5 gallons per flush to optimize water efficiency. Built to Sloan’s rigorous standards, this kit ensures reliable, leak-free operation, extends fixture lifespan, and supports sustainable water management in commercial restrooms.

## Description

desertcart.com: Sloan Regal A-38-A Water Closet Diaphragm Assembly Kit 3.5 GPF - Natural Rubber Diaphragm with Brass Bypass | For use with Regal Flushometers | OEM Sloan Parts, 3301038 : Tools & Home Improvement

Review: worked as expected. (careful of vacuum when unscrewing) - Worked as expected. The original's rubber had been dissolved and torn, presumably by years of the chlorine in the water. Note: unscrewing the chrome top of the valve may be very tough and it'll seem stuck, even with a strap wrench because it's just water under there and thus a vaccum prevents the top from moving up. now that i think about it probably should leave the water source on at least a little while unscrewing to not deal with it. or initiate a flush while the water is still somewhat on and then immediately turn it off. Not going to experiment on it now, but yeah it's probably THAT and not that it's corroded together. Don't just keep cranking on it or you may pull the pipes out of the wall.
Review: Nice Quality - Nice quality and just the right replacement part. Installed it today and took care of the problem.

## Features

- WATER CLOSET DIAPHRAGM ASSEMBLY: Our Regal water closet diaphragm assembly kit is intended to replace worn or end of service life assemblies. The replacement assembly has a natural rubber diaphragm and brass bypass that will ensure an accurate flush every time.
- COMPATIBILITY CHECK: This water closet diaphragm assembly is specifically designed to work as a replacement for our line of Regal Flushometers. Regal water closet diaphragm replacements come in 1.6 gpf, 3.5 gpf, and 4.5 gpf. Always make sure to check part compatibility to ensure a quick, hassle-free repair.
- INTELLIGENT DESIGN: Our Diaphragm Assemblies are specially crafted to limit water closet and urinal water consumption. Worn-out diaphragms can lead to water waste or incorrect flushing amounts. Optimize your flushometers to reduce costs, preserve water, and promote sustainability.
- SLOAN GENUINE PARTS: Extend the life of your Sloan products. Our products perform at their highest levels when maintained exclusively using Sloan Genuine Parts. We offer the largest selection of best-in-class parts, manufactured and tested to Sloan specifications, specifically designed for the most reliable commercial restroom products. This means fewer repairs and protects your investments.
- WATER CONNECTS US: Every day around the world, Sloan products connect the systems that manage our planet's most precious resource. As the world's leading manufacturer of commercial plumbing systems, we've spent more than a century pioneering smart, water-saving restroom solutions that are built to last a lifetime.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B000UFW78S |
| Best Sellers Rank | #9,181 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #19 in Toilet Flush Valves |
| Brand Name | Sloan |
| Connector Type | Threaded |
| Customer Reviews | 4.8 4.8 out of 5 stars (542) |
| Exterior Finish | Chrome |
| Global Trade Identification Number | 00671254039445 |
| Included Components | kitchen-sink-installation-parts-and-kits |
| Inlet Connection Size | 2 Inches |
| Inlet Connection Type | The inlet connection type for the Sloan Regal A-38-A Water Closet Diaphragm Assembly Kit is likely to be a 'Diaphragm' connection. |
| Item Dimensions | 3 x 3.3 x 3.3 inches |
| Item Type Name | 3.5 GPF Repair Kit |
| Item Weight | 0.01 Ounces |
| Manufacturer | Sloan Valve Co. |
| Manufacturer Warranty Description | Warranty |
| Material Type | Brass, Rubber |
| Model Number | 33996 |
| Number of Ports | 2 |
| Outlet Connection Size | 2 Inches |
| Outlet Connection Type | Threaded |
| Size | 3.5 GPF |
| Specification Met | EPA, WaterSense |
| Thread Size | 2 inches |
| Thread Type | National Pipe Thread (NPT) |
| UPC | 783961315771 671254039445 784497874817 |
| Unit Count | 1.0 Count |
| Valve Type | Diaphragm Valve |

## Product Details

- **Brand:** Sloan
- **Exterior Finish:** Chrome
- **Inlet Connection Size:** 2 Inches
- **Item dimensions L x W x H:** 3 x 3.3 x 3.3 inches
- **Material:** Brass, Rubber
- **Number of Ports:** 2
- **Outlet Connection Size:** 2 Inches
- **Outlet Connection Type:** Threaded
- **Specification Met:** EPA, WaterSense

## Images

![Regal A-38-A Water Closet Diaphragm Assembly Kit 3.5 GPF - Natural Rubber Diaphragm with Brass Bypass | For use with Regal Flushometers | OEM Sloan Parts, 3301038 - Image 1](https://m.media-amazon.com/images/I/61xoMJ2Qp1L.jpg)

## Available Options

This product comes in different **Size, Number Of Items** options.

## Questions & Answers

**Q: My flushometer currently has a A-36-A diaphragm kit in it.I am looking to make it more economical.Will the A-38-A do so?Lower the standing water level**
A: Nick B said on November 23, 2014  |  Edit A-36A USE -4.5 GALLONS PER FLUSH /16.9LITERS PER FLUSHA- 38 A USE 3.5 gpf/13.2 Lpf one gallon less

**Q: does this only work for Sloan urinals, Im looking for Crane Urinal parts. will this work?**
A: this is not for other brands, only sloan

**Q: Does this include all of the "guts" needed to rebuild a urinal flush valve?**
A: Yes, except for the vacuum breaker, and anything below that. Also the shut off itself, which may or may not need replacement.

**Q: Does this fit the gem 2?**
A: do not think so, the gem is a cartridge right?

## Customer Reviews

### ⭐⭐⭐⭐⭐ worked as expected. (careful of vacuum when unscrewing)
*by V***M on February 19, 2026*

Worked as expected. The original's rubber had been dissolved and torn, presumably by years of the chlorine in the water. Note: unscrewing the chrome top of the valve may be very tough and it'll seem stuck, even with a strap wrench because it's just water under there and thus a vaccum prevents the top from moving up. now that i think about it probably should leave the water source on at least a little while unscrewing to not deal with it. or initiate a flush while the water is still somewhat on and then immediately turn it off. Not going to experiment on it now, but yeah it's probably THAT and not that it's corroded together. Don't just keep cranking on it or you may pull the pipes out of the wall.

### ⭐⭐⭐⭐⭐ Nice Quality
*by G***D on September 9, 2025*

Nice quality and just the right replacement part. Installed it today and took care of the problem.

### ⭐⭐⭐⭐⭐ Perfect fit and high quality.
*by O***X on July 2, 2025*

Genuine Sloan flush valve seal. Works great. Good product.

## Frequently Bought Together

- Sloan Regal A-38-A Water Closet Diaphragm Assembly Kit 3.5 GPF - Natural Rubber Diaphragm with Brass Bypass | For use with Regal Flushometers | OEM Sloan Parts, 3301038
- Sloan Regal V-551-A Vacuum Breaker Repair Kit - Replace Broken or Malfunctioning Vacuum Breakers | For use with Regal Flushometers | OEM Sloan Parts, 3323192
- Sloan A-71 Inside Cover for Sloan Flushometers - Compatible with Royal, Regal, Series 900 Hydraulic and PWT Series 600 Flushometers, Original OEM Parts, 0301168

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*Product available on Desertcart Greece*
*Store origin: GR*
*Last updated: 2026-04-24*