---
product_id: 90313179
title: "Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz."
brand: "taylor technologies"
price: "₨1282"
currency: SCR
in_stock: true
reviews_count: 8
url: https://www.desertcart.sc/products/90313179-taylor-technologies-r-0004-e-reagent-no-4-ph-indicator
store_origin: SC
region: Seychelles
---

# pH Indicator #4 for exact water balance 16 oz precision reagent Optimizes pool comfort & safety Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz.

**Brand:** taylor technologies
**Price:** ₨1282
**Availability:** ✅ In Stock

## Summary

> 🧪 Stay ahead in pool care with precision you can trust!

## Quick Answers

- **What is this?** Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz. by taylor technologies
- **How much does it cost?** ₨1282 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/90313179-taylor-technologies-r-0004-e-reagent-no-4-ph-indicator)

## Best For

- taylor technologies enthusiasts

## Why This Product

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

## Key Features

- • **Optimal Volume:** Generous 16 oz bottle ensures long-lasting testing supply
- • **Pool Perfected:** Maintains ideal pH levels for a safer, more comfortable swimming experience
- • **Easy Integration:** Seamlessly replaces reagent in Taylor Test Kits for hassle-free maintenance
- • **Precision pH Indicator:** Accurately measures pool pH for perfect water chemistry
- • **Trusted Taylor Quality:** Reliable reagent from a top-ranked brand in analytical reagents

## Overview

Taylor Technologies R-0004-E is a 16 oz bottle of Reagent No.4 pH Indicator designed for Taylor Test Kits, delivering precise pH measurement to maintain optimal pool water balance. Highly rated and trusted by professionals, it ensures safe, comfortable swimming by accurately monitoring and adjusting pH levels.

## Description

Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz.

Review: Good product - Needed to find some phenol red. this was it.
Review: It's the stuff. - Works.

## Features

- Replacement reagent for the Taylor Test Kits
- 16 oz bottle of pH Indicator # 4
- Taylor Reagent #: R-0004-E

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004155SZW |
| Best Sellers Rank | #33,085 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #42 in Analytical Reagents |
| Brand | Taylor Technologies |
| Customer Reviews | 4.6 4.6 out of 5 stars (157) |
| Is Discontinued By Manufacturer | No |
| Item Form | Liquid |
| Item Weight | 1 pounds |
| Item model number | R-0004-E |
| Manufacturer | Taylor Technologies |
| Number of Items | 1 |
| Product Benefits | Maintains proper pH levels for comfortable swimming and effective water treatment |
| Product Dimensions | 8 x 4 x 4 inches |
| UPC | 840036000236 840036000229 |
| Unit Count | 16.0 Ounce |

## Product Details

- **Brand:** Taylor Technologies
- **Item Form:** Liquid
- **Item Weight:** 16 Ounces
- **Product Benefits:** Maintains proper pH levels for comfortable swimming and effective water treatment
- **UPC:** 840036000236 840036000229

## Images

![Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz. - Image 1](https://m.media-amazon.com/images/I/71WPWFR2xuL.jpg)

## Questions & Answers

**Q: Are these bulk bottles meant for refilling the smaller dropper bottles? If not, how do you dispense the appropriate amount of reagent?**
A: Yes, you bulk bottles meant to refill the small dropper bottles that came with original test kit.

**Q: What is the shelf life?**
A: a couple of years at least , if stored in air cond. in the dark, or a couple of weeks in the sun. do not freeze

**Q: Can i use this product with my poolmaster test kit?  not just for measuring ph, but also for acid demand test?**
A: U put 5 drops in 44 ml of water ,yellow is 7.0, purple is 8.0 so 7.4 is a kinda orangy pink peachy. u will need the acid demand and base demand drops to add to ur test. So lets say ur pool is at 7.8 ph and you need it to be 7.4 You add however many drops it takes to change its color to peachy,then U figure how many cups of acid in the pool equals 1 drop probably 1 for a 15000 gal pool , start with 1 cup of muratic per drop for a 15000 gal pool  Acid Demand #: R-0005-A

**Q: what is the expiration date?**
A: Usually 2 years, just depends.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good product
*by A***R on October 23, 2025*

Needed to find some phenol red. this was it.

### ⭐⭐⭐⭐⭐ It's the stuff.
*by S***O on May 17, 2024*

Works.

### ⭐⭐⭐⭐⭐ This size bottle gives you the best value if you test frequently
*by J***N on December 20, 2021*

I have the full Taylor test kit that I use for both my pool and spa. I buy these larger bottles and use them to refill the smaller bottles in my test kit. The tips pull right off of the smaller bottles with a little bit or force. Use some gloves when transferring back and forth with this bottle or you'll get some nice yellowish stains on your skin with this product. Try to store this where the temperature is fairly constant and it's not in direct sunlight.

## Frequently Bought Together

- Taylor Technologies R-0004-E Reagent No.4 pH Indicator 16 oz.
- TAYLOR TECHNOLOGIES INC R-0871-E FAS-DPD TITRATING 16 OZ
- Taylor Replacement Reagent R-0870-J DPD Powder .25-Pound

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**Shop now:** [https://www.desertcart.sc/products/90313179-taylor-technologies-r-0004-e-reagent-no-4-ph-indicator](https://www.desertcart.sc/products/90313179-taylor-technologies-r-0004-e-reagent-no-4-ph-indicator)

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-23*