---
product_id: 11294984
title: "Stanley 61804 Professional Backpack Poly 4-Gallon Sprayer"
brand: "chapin international"
price: "₨9897"
currency: SCR
in_stock: false
reviews_count: 8
url: https://www.desertcart.sc/products/11294984-stanley-61804-professional-backpack-poly-4-gallon-sprayer
store_origin: SC
region: Seychelles
---

# 4-gallon capacity for extended use Ergonomic adjustable straps reduce fatigue Brass nozzle delivers powerful, precise spray Stanley 61804 Professional Backpack Poly 4-Gallon Sprayer

**Brand:** chapin international
**Price:** ₨9897
**Availability:** ❌ Out of Stock

## Summary

> 🎯 Spray Like a Pro, Work Like a Boss!

## Quick Answers

- **What is this?** Stanley 61804 Professional Backpack Poly 4-Gallon Sprayer by chapin international
- **How much does it cost?** ₨9897 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.sc](https://www.desertcart.sc/products/11294984-stanley-61804-professional-backpack-poly-4-gallon-sprayer)

## Best For

- chapin international enthusiasts

## Why This Product

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

## Key Features

- • **Precision Spray Control:** Brass nozzle ensures targeted application—protect your plants and save product.
- • **Hand-Powered Reliability:** Strong pump action delivers consistent pressure without batteries or cords—always ready when you are.
- • **Durable & Easy Maintenance:** Robust plastic build with a convenient filter and easy-fill lid keeps your sprayer clog-free and ready.
- • **Ergonomic Comfort for All-Day Use:** Adjustable, contoured straps and back support keep you fatigue-free during long projects.
- • **Maximize Efficiency with 4 Gallons:** Cover large areas without constant refills—work smarter, not harder.

## Overview

The Stanley 61804 Professional Backpack Poly 4-Gallon Sprayer is a durable, hand-powered knapsack sprayer designed for efficient lawn and garden care. Featuring a large 4-gallon capacity, ergonomic adjustable straps, and a brass nozzle for precise spraying, it enables fast, fatigue-free application of herbicides, pesticides, and fertilizers. Its easy-fill lid and built-in filter ensure hassle-free maintenance, making it the go-to tool for professionals and serious gardeners alike.

## Description

From the Manufacturer Stanley by Chapin Professional Backpack Poly Sprayer 4 Gallon Sprayer. Great backpack sprayer to help you get your job done fast: Herbicides, Pesticides or Fertilizers. For any lawn and garden project, the Stanley Lawn & Garden Series covers the full gamut. From the patio gardener to the weekend warrior to the professional.

Review: What a relief!!! Good piece of equipment! - After running around with 1-2 gallon tanks and having my arm almost falling off (on a relatively averaged size lawn, 10,000 sq ft) I thought about backpack sprayer and was compelled to buy this one, thanks to other positive reviews. I used it once so far, but - BOY - does it make a difference!!!? First of all - it had adjustable straps and the back of it is profiled so it does not hurt your back. The pump is strong and couple strokes is enough to have a strong spray. In fact, spray is very strong and attached brass nozzle does distribute liquid very efficiently. In fact, I had my lawn done in 10-15 minutes and it was actually fun and pleasure! I enjoyed the speed of doing it so much that rather than spot treating, I walked the lawn systematically and sprayed the whole thing (which used the 6 gallons, by the way), but at least I know I covered all of the bad and potentially bad spots. The advantage over the concentrate hose sprayer is when you (like me) have a veggie garden or ornamental/fruit plants and bushes and you don't want to cover them by accident (which is easy using hose), you control it in this case. The advantage over hand-held 2 gallon tank sprayer is self-explanatory - you save yourself a lot of fatigue, do job faster and more efficiently and in an ergonomic fashion. This tanks sprayer does the job like a pro!!!
Review: Sturdy; easy to use - Purchased this to apply herbicide to a quarter of an acre of cattails. Easy to fill and use. The side pump is easily accessed and effective; you won't need to pump much for the pressure you need. The lid is easy on and easy off, something I have found to be a problem on sprayers. There is a great filter for filling so you don't let debris into the tank that might shut the system down. 4 gallons is 32 lbs of liquid, a hefty weight on your back. The straps do fine and I spent most of a day filling and refilling, off and on. For the money this is great product.

## Features

- Sold on desertcart

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Brand | Chapin International |
| Customer Reviews | 4.0 out of 5 stars 114 Reviews |
| Included Components | Nozzle, Strainer Basket, Pump, Hose |
| Material | Plastic |
| Power Source | Hand Powered |
| Style | Knapsack |
| UPC | 023883618049 |

## Product Details

- **Brand:** Chapin International
- **Material:** Plastic
- **Style:** Knapsack
- **Power Source:** Hand Powered
- **Included Components:** Nozzle, Strainer Basket, Pump, Hose

## Images

![Stanley 61804 Professional Backpack Poly 4-Gallon Sprayer - Image 1](https://m.media-amazon.com/images/I/710RABiOa3L.jpg)
![Stanley 61804 Professional Backpack Poly 4-Gallon Sprayer - Image 2](https://m.media-amazon.com/images/I/61vw348k82L.jpg)
![Stanley 61804 Professional Backpack Poly 4-Gallon Sprayer - Image 3](https://m.media-amazon.com/images/I/6140u8z8fNL.jpg)
![Stanley 61804 Professional Backpack Poly 4-Gallon Sprayer - Image 4](https://m.media-amazon.com/images/I/71mnnbX+aIL.jpg)
![Stanley 61804 Professional Backpack Poly 4-Gallon Sprayer - Image 5](https://m.media-amazon.com/images/I/81rCCnpO1aL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ What a relief!!! Good piece of equipment!
*by T***K on May 17, 2012*

After running around with 1-2 gallon tanks and having my arm almost falling off (on a relatively averaged size lawn, 10,000 sq ft) I thought about backpack sprayer and was compelled to buy this one, thanks to other positive reviews. I used it once so far, but - BOY - does it make a difference!!!? First of all - it had adjustable straps and the back of it is profiled so it does not hurt your back. The pump is strong and couple strokes is enough to have a strong spray. In fact, spray is very strong and attached brass nozzle does distribute liquid very efficiently. In fact, I had my lawn done in 10-15 minutes and it was actually fun and pleasure! I enjoyed the speed of doing it so much that rather than spot treating, I walked the lawn systematically and sprayed the whole thing (which used the 6 gallons, by the way), but at least I know I covered all of the bad and potentially bad spots. The advantage over the concentrate hose sprayer is when you (like me) have a veggie garden or ornamental/fruit plants and bushes and you don't want to cover them by accident (which is easy using hose), you control it in this case. The advantage over hand-held 2 gallon tank sprayer is self-explanatory - you save yourself a lot of fatigue, do job faster and more efficiently and in an ergonomic fashion. This tanks sprayer does the job like a pro!!!

### ⭐⭐⭐⭐⭐ Sturdy; easy to use
*by S***Y on December 3, 2012*

Purchased this to apply herbicide to a quarter of an acre of cattails. Easy to fill and use. The side pump is easily accessed and effective; you won't need to pump much for the pressure you need. The lid is easy on and easy off, something I have found to be a problem on sprayers. There is a great filter for filling so you don't let debris into the tank that might shut the system down. 4 gallons is 32 lbs of liquid, a hefty weight on your back. The straps do fine and I spent most of a day filling and refilling, off and on. For the money this is great product.

### ⭐⭐⭐ 1. Lousy padding of straps/back 2. Repair tip for piston collar
*by C***M on April 19, 2012*

Update: Don't buy this sprayer!!! At least don't buy it if you have over 5 minutes of spraying to do. I finally bought the Chapin pro model 6200 of this sprayer - it has a padded harness that is incredibly more comfortable than having the hard plastic of this Stanley sprayer against your back. Spend the little extra money and give your back a break by buying either the Chapin Pro 6200 (brass wand) or the 6190 Pro (stainless steel wand). [Water weighs 8.3 pounds per gallon, so walking around with 24 pounds of liquid + the 9 pound weight of this sprayer on your back is too heavy not to get the better backpack harness in the Chapin 6200 or 6190 sprayers.] Twice I've had to replace the rubber piston collar (really the rubber cylinder head) after very extensive use. So if you have this sprayer and notice that despite pumping that no internal pressure is produced, then you may have to replace this worn rubber part. (It makes sense that it eventually wears out, as this collar sits on the end of the piston, and rubs on the side of the piston cylinder every time you pump.) Indeed, I would recommend you order part Chapin 6-8180 Piston Pump Repair Kit, available on Amazon, at the same time you order this sprayer, as it is likely you will need the part, and it is convenient to have it on hand. (You have to order the kit that also contains some gaskets, although it seems likely the it is the rubber cylinder collar that is most likely to eventually wear out. Replacement is fairly easy - see my comments for the Chapin 6-8180 Piston Pump Repair Kit.

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*Product available on Desertcart Seychelles*
*Store origin: SC*
*Last updated: 2026-02-26*