---
product_id: 742752359
title: "3'' UNISEAL Flexible Tank Adapter (bulkhead)"
brand: "green goods"
price: "€ 61.99"
currency: EUR
in_stock: true
url: https://www.desertcart.nl/products/742752359-3-uniseal-flexible-tank-adapter-bulkhead
store_origin: NL
region: Netherlands
---

# Withstands up to 65 PSI pressure Resists acids, oils, grease & gasoline 3'' Schedule 40 PVC compatible 3'' UNISEAL Flexible Tank Adapter (bulkhead)

**Brand:** green goods
**Price:** € 61.99
**Availability:** ✅ In Stock

## Summary

> 🔧 Seal smarter, not harder — the ultimate flexible tank adapter!

## Quick Answers

- **What is this?** 3'' UNISEAL Flexible Tank Adapter (bulkhead) by green goods
- **How much does it cost?** € 61.99 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/742752359-3-uniseal-flexible-tank-adapter-bulkhead)

## Best For

- green goods enthusiasts

## Why This Product

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

## Key Features

- • **Made in the USA:** Quality craftsmanship you can trust
- • **Pressure-Proof Seal:** Reliable up to 65 PSI for demanding applications
- • **Unmatched Versatility:** Seals curved & irregular surfaces flawlessly
- • **Effortless Installation:** Slip-on design cuts labor time and complexity
- • **Durable Chemical Resistance:** Handles harsh substances without degradation

## Overview

The 3'' UNISEAL Flexible Tank Adapter is a premium injection-molded seal designed for 3 inch Schedule 40 PVC pipes, providing a liquid-tight, chemical-resistant connection on curved or irregular tank surfaces. Made from durable Alcryn TPE rubber, it withstands pressures up to 65 PSI and resists acids, oils, greases, gasoline, and sewage. Engineered for easy installation and long-lasting performance, this USA-made adapter reduces labor and material costs while delivering unmatched versatility in plumbing and industrial applications.

## Description

Uniseal is simply the world's best seal and installing the Uniseal is a simple process. After cutting a hole in the wall of a tank or other surface, the seal is inserted. Then the pipe is coated with a slippery detergent (i.e. dish soap) and pushed into the seal. Uniseal products replace traditional plumbing hardware with a single injection molded unit requiring no component parts. It was designed to solve many of the issues of pipe to tank connections. For many industries pipe to tank seals are traditionally among the most complex connections to manufacture. Traditional seals require multiple parts such as, rigid flanges, bolts, washers, o-rings, along with long assembly times and high production costs. The Du Pont Alcryn is the key to the liquid-tight seal. When the pipe is pushed through the rubber-like Uniseal from the outside, the inside Alcryn wall becomes thin enough to allow the pipe to squeeze through and then forms a liquid-tight seal. The coefficient of friction with the plastic pipe is roughly three times higher than any other material which allows it to create a better seal than with any other material. In static conditions the seal is good up to 65 PSI. Uniseal can withstand pressure, and suction, acids, oils, greases, gasoline, sewage, waste, heat and cold. It offers long life, easy installation and reduced labor and material costs.

## Features

- Versatile Attachment Solution: Uniseals provide a reliable method to attach 3 inch bulkhead fitting pipes to various containers, especially on curved surfaces like storage drums and buckets, where traditional bulkhead fittings might fail. Ideal for 3 inch Schedule 40 PVC pipes.
- Solves Issues: Made from long-lasting TPE melt-processable rubber, this seal resists acids, oils, greases, gasoline, and sewage, while withstanding pressure up to 65 psi and extreme temperatures. Designed for 3" ID x 3.5" OD pipes with a 4" hole size, it ensures easy installation and reduced labor costs.
- Liquid Tight Seal: UNISEAL is the world's best product. UNISEALS provide more versatility than a traditional bulkhead, handling irregularities and curvatures with ease.
- Easy To Install: Longevity, easy installation, and reduced labor and material costs. It is made to withstand pressure and suction as well as oils, greases, sewage, waste, heat and cold.
- The Best: To achieve optimal results in straight or curved applications, the UNISEAL is the only choice to meet your sealing needs. Made in the USA.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Size | 3 inches |
| Material | Alcryn |
| Brand | GREEN GOODS |
| Colour | Black |
| Item dimensions L x W x H | 11.9 x 11.9 x 1.8 Centimeters |
| Connector Type | Adapter |
| Thread Size | 3 inch |
| Thread Type | UN |
| Item Weight | 0.15 Pounds |
| Number of Pieces | 1 |
| Manufacturer | The Uniseal Warehouse |
| UPC | 799475705793 |
| Country of Origin | USA |
| Item model number | U300 |
| Product Dimensions | 11.91 x 11.91 x 1.83 cm; 68.04 g |
| ASIN | B00BR5RYXS |

## Product Details

- **Size:** 3 inches
- **Material:** Alcryn
- **Brand:** GREEN GOODS
- **Colour:** Black
- **Item dimensions L x W x H:** 11.9 x 11.9 x 1.8 Centimeters
- **Connector Type:** Adapter
- **Thread Size:** 3 inch
- **Thread Type:** UN
- **Item Weight:** 0.15 Pounds
- **Number of Pieces:** 1

## Images

![3'' UNISEAL Flexible Tank Adapter (bulkhead) - Image 1](https://m.media-amazon.com/images/I/6131G8MRNCS.jpg)
![3'' UNISEAL Flexible Tank Adapter (bulkhead) - Image 2](https://m.media-amazon.com/images/I/61EsMpxxy-S.jpg)
![3'' UNISEAL Flexible Tank Adapter (bulkhead) - Image 3](https://m.media-amazon.com/images/I/71a6nAeIW7S.jpg)
![3'' UNISEAL Flexible Tank Adapter (bulkhead) - Image 4](https://m.media-amazon.com/images/I/71iaGQEcqGS.jpg)
![3'' UNISEAL Flexible Tank Adapter (bulkhead) - Image 5](https://m.media-amazon.com/images/I/71-NQIgtopS.jpg)

## Questions & Answers

**Q: What size hole saw should be used for a 3" Uniseal?**
A: 4" hole saw.  The link below has a chart for the various sizes.

http://www.unisealshop.com/page.cfm?page=3

**Q: What temperature can this withstand, I am considering this for an automotive application and was wondering if it can handle engine bay heat**
A: I used this product for pond plumbing. I don't think this can handle the amount of heat.

**Q: Will this work on a 55 gallon plastic drum? (Round side?)  Thanks**
A: Yes. It works well when executed correctly.. I have one in a huge tank twenty feet in the air. It has set for seven years and not leaked a drop. It has a four foot hole, and holds 3,000 gallions. Wish that this helps. Uniseal..

**Q: What pipe would work with this? a 3-inch pvc pipe has a outside diameter of greater than 3 in and is far bigger than the hole in the uniseal**
A: Uniseals are labeled for the size pipe they work with,  This uniseal is designed to work with 3" SCH 40 PVC pipe.

## Frequently Bought Together

- 3'' UNISEAL Flexible Tank Adapter (bulkhead)
- 2" Uniseal Flexible Tank Adapter - Perfect for Attaching 2-inch pipe to Curved Surfaces, Storage Drums, Buckets, and More - Ideal for Situations Where Bulkheads Fail - 2 Pack
- 1 1/2" UNISEAL Flexible Tank Adapter (Bulkhead) - 2 Pack

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-28*