---
product_id: 312592733
title: "Rain Harvesting Downspout First Flush Diverter Kit, 3\""
brand: "rain harvesting"
price: "VT32712"
currency: VUV
in_stock: true
reviews_count: 5
category: "Rain Harvesting"
url: https://www.desertcart.vu/products/312592733-rain-harvesting-downspout-first-flush-diverter-kit-3
store_origin: VU
region: Vanuatu
---

# slow-release valve for auto drainage 3" pipe compatibility NSF 61 certified contamination prevention Rain Harvesting Downspout First Flush Diverter Kit, 3"

**Brand:** rain harvesting
**Price:** VT32712
**Availability:** ✅ In Stock

## Summary

> 💧 Capture the cleanest rain—because your water deserves the first flush!

## Quick Answers

- **What is this?** Rain Harvesting Downspout First Flush Diverter Kit, 3" by rain harvesting
- **How much does it cost?** VT32712 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/312592733-rain-harvesting-downspout-first-flush-diverter-kit-3)

## Best For

- rain harvesting enthusiasts

## Why This Product

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

## Key Features

- • **Built to Last:** Durable materials withstand harsh weather and salty air without corrosion.
- • **Seamless Integration:** Designed for standard 3" downspouts—plug & play installation.
- • **Pure Rain, Every Time:** Automatically diverts first flush to keep your water tank pristine.
- • **Effortless Maintenance:** Easy hand-access drain valve ensures quick cleaning after heavy rains.
- • **Water Security Upgrade:** Ideal for drought-prone areas, maximizing clean water harvest with every drop.

## Overview

The Rain Harvesting Downspout First Flush Diverter Kit (3") is a smart, NSF 61 certified system that automatically diverts the initial contaminated runoff from your roof before it reaches your water tank. Featuring a slow-release valve for self-draining and easy maintenance, it fits standard 3" pipes and ensures your rainwater supply stays clean and safe—perfect for eco-conscious professionals managing sustainable water solutions.

## Description

Keep contaminants out of your rainwater supply with the Rain Harvesting First Flush Downspout. Equipped with a slow-release valve, this system automatically drains the chamber over time, keeping it ready for the next rainfall. The First Flush Basic comes with everything you need for installation, requiring only the addition of a 3" pipe for the chamber. Boasting an efficient design, this first flush will prevent both organic and inorganic contaminants getting into your water tank, and ensure a high standard of quality in the final collection tank.

Review: I wrote this in the Leaf Eater comments and it deserves to be here too. I love these and combined them with the Downpipe First Flush Water Diverter Kit system. (also on desertcart) And they work great. I'm in a 3rd world Caribbean country and have had NO city water for almost 2 years and in a major drought. We are having are second heavy rain since last FEB. and watching these simple systems collecting water off a rather dirty roof with the Leaf Eater taking out the larger debris while the flush system takes captures the finer dust and... bird stuff. Both need a little cleaning type maintenance after a hard rain, it is easy to do and I'm glad to do it. I have 3 of the 4 Leaf Eaters installed so they are easy to get to from upper porch, the other I need a ladder. The Flush system needs to be opened at the bottom, easy by hand, to clear the drain. But since we have only had 2 heavy rains, they have a lot of garbage to deal with. Since we need all the water we can get, small price to pay. 1" of rain = 2,000 gallons for us going into 2 water cisterns. I'll take all that I can. Not difficult to install. We are on the Atlantic Ocean with VERY salty air; the Leaf Eater stainless steel grid has held up very well with NO corrosion at all. We also have had to put in a well, very salty and nasty water but we have filters/UV and 3 RO systems by iSpring that deliver 1,500 a day. When you don't have ANY water, you do what you need to do. When you find good products that could help others dealing with drought and water problems, then you should talk about them. Thank you
Review: Just bought this unit, looks and sounds great but you can't buy the pipe or fittings to go with it in the uk so a compleate waist of money!

## Features

- Kit does NOT include the middle shaft
- Divert the first flush of rain water before it goes to your tank
- International products have separate terms, are sold from abroad and may differ from local products, including fit, age ratings, and language of product, labeling or instructions.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001OWG6BU |
| Batteries required | No |
| Best Sellers Rank | #34,579 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #7 in Roofing Gutters |
| Customer Reviews | 4.4 4.4 out of 5 stars (237) |
| Date First Available | 6 March 2014 |
| Item model number | WDDS99 |
| Product Dimensions | 10.16 x 15.24 x 20.32 cm; 748 g |
| Specification met | National Sanitation Foundation 61 |

## Product Details

- **Brand:** Rain Harvesting
- **Colour:** White
- **Material:** Polyvinyl Chloride (PVC)
- **Product dimensions:** 10.2L x 15.2W x 20.3H centimeters
- **Specification met:** National Sanitation Foundation 61

## Images

![Rain Harvesting Downspout First Flush Diverter Kit, 3" - Image 1](https://m.media-amazon.com/images/I/21ceEiCfhcL.jpg)
![Rain Harvesting Downspout First Flush Diverter Kit, 3" - Image 2](https://m.media-amazon.com/images/I/31rstcLSkUL.jpg)
![Rain Harvesting Downspout First Flush Diverter Kit, 3" - Image 3](https://m.media-amazon.com/images/I/31slASOvgNL.jpg)
![Rain Harvesting Downspout First Flush Diverter Kit, 3" - Image 4](https://m.media-amazon.com/images/I/41ItUHEHmmL.jpg)
![Rain Harvesting Downspout First Flush Diverter Kit, 3" - Image 5](https://m.media-amazon.com/images/I/41g8s76RJuL.jpg)

## Questions & Answers

**Q: How does this system work with standard 2x3 aluminum downspouts?  I currently have Oatey diverter installed but wanted to add a first flush system**
A: It will certainly work but you need other parts...like this...http://www.amazon.com/InvisaFlow-4400-Grate-Downspout-Filter/dp/B0061Q5DW2/ref=pd_sim_lg_8?ie=UTF8&refRID=12SVWE9CH475G0A0P16W You definitely want a filter above the unit. Here is another one http://www.amazon.com/Rain-Harvesting-Pty-Ltd-Advanced/dp/B004VMG05C/ref=sr_1_4?ie=UTF8&qid=1430844792&sr=8-4&keywords=First+Flush

**Q: Can the ball get lodged in the tube by debris?**
A: If debris is large it is possible. The 3" first flush is a bit tighter than the 4". Do know this, smaller debris will clog the screen at the bottom before the ball will get lodged, this will make prevent/slow the initial bad water from draining properly. Also consider the amount of water you need to flush based on roof surface area flowing to the flush. Reduce debris that could clog the system with gutter guards not expensive and just put them on the gutters feeding the capture system. This will also help with the routine maintenance, you need to clean it out the sediment/small debris to keep it working at it's best. If you were wondering why you see fine screens offered with the system. Fine screen keeps small debris out of the drain screen allowing better draining and longer intervals between cleaning. Picking little twigs, pine needles and stems of leaves out of the drain screen supplied with the system is no fun. The fine mesh over this is a plus in so many ways. Hope this helps and good luck.

**Q: Do you have any drawings or illustrations available on how this is installed and how it works?**
A: Yes, we do, but you will need to email us through Amazon support so that we can email you the attachments that you need. As there is no way to provide an attachment here.

**Q: Where can I buy extra filter to fit in 3inch pvc pipe?**
A: You would need to reach out the manufacturer for help with this, they are good at taking care of these requests, we do not carry extra parts.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Review
*by D***Y on 20 October 2015*

I wrote this in the Leaf Eater comments and it deserves to be here too. I love these and combined them with the Downpipe First Flush Water Diverter Kit system. (also on Amazon) And they work great. I'm in a 3rd world Caribbean country and have had NO city water for almost 2 years and in a major drought. We are having are second heavy rain since last FEB. and watching these simple systems collecting water off a rather dirty roof with the Leaf Eater taking out the larger debris while the flush system takes captures the finer dust and... bird stuff. Both need a little cleaning type maintenance after a hard rain, it is easy to do and I'm glad to do it. I have 3 of the 4 Leaf Eaters installed so they are easy to get to from upper porch, the other I need a ladder. The Flush system needs to be opened at the bottom, easy by hand, to clear the drain. But since we have only had 2 heavy rains, they have a lot of garbage to deal with. Since we need all the water we can get, small price to pay. 1" of rain = 2,000 gallons for us going into 2 water cisterns. I'll take all that I can. Not difficult to install. We are on the Atlantic Ocean with VERY salty air; the Leaf Eater stainless steel grid has held up very well with NO corrosion at all. We also have had to put in a well, very salty and nasty water but we have filters/UV and 3 RO systems by iSpring that deliver 1,500 a day. When you don't have ANY water, you do what you need to do. When you find good products that could help others dealing with drought and water problems, then you should talk about them. Thank you

### ⭐ Review
*by A***. on 28 November 2025*

Just bought this unit, looks and sounds great but you can't buy the pipe or fittings to go with it in the uk so a compleate waist of money!

### ⭐⭐⭐⭐⭐ Review
*by J***E on 16 September 2025*

This is a very good product. Performs perfectly. I am very satisfied with the performance. I have gotten inquiries from both friends and family. I highly recommend it to anyone who is thinking of rain harvesting.

## Frequently Bought Together

- Downspout First Flush Diverter Kit, 3"
- Leaf Eater Advanced Rain Harvesting RHAD100 Both 3" and 4" Compatible
- Rain Harvesting Tank Gauge, Tank-Top Water Level Monitoring Device for Rain Water Catching Systems

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-02-14*