---
product_id: 71327431
title: "Flame King YSN401 Steel Propane Tank Cylinder With Overflow Protection Device Valve, 40 Lb, White"
brand: "flame king"
price: "$647.78"
currency: USD
in_stock: true
reviews_count: 10
category: "Flame King"
url: https://www.desertcart.us/products/71327431-flame-king-ysn401-steel-propane-tank-cylinder-with-overflow-protection
store_origin: US
region: United States of America
---

# OPD valve prevents overfilling 40 lb capacity with standard valve DOT & Transport Canada certified safety Flame King YSN401 Steel Propane Tank Cylinder With Overflow Protection Device Valve, 40 Lb, White

**Brand:** flame king
**Price:** $647.78
**Availability:** ✅ In Stock

## Summary

> 🔥 Stay fueled, stay safe — the pro’s choice for propane power!

## Quick Answers

- **What is this?** Flame King YSN401 Steel Propane Tank Cylinder With Overflow Protection Device Valve, 40 Lb, White by flame king
- **How much does it cost?** $647.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.us](https://www.desertcart.us/products/71327431-flame-king-ysn401-steel-propane-tank-cylinder-with-overflow-protection)

## Best For

- flame king enthusiasts

## Why This Product

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

## Key Features

- • **Generous 40 lb Capacity:** Large tank size with standard valve fits RVs, heaters & trailers effortlessly
- • **Trusted Industry Leader:** Flame King’s premium propane tanks ensure reliability from 1 lb to 100 lb sizes
- • **Certified Safety Assurance:** X-ray & hydrostatic tested for secure transport across US & Canada
- • **Durable Steel Construction:** High-grade welded steel with rust-resistant powder coating for long-lasting use
- • **Overfill Protection Device:** Built-in OPD valve meets legal standards and prevents dangerous overfilling

## Overview

The Flame King YSN401 is a 40 lb steel propane tank featuring a legally required Overfill Protection Device (OPD) valve, certified by DOT and Transport Canada for safe transport. Constructed from high-grade welded steel with a rust-resistant powder coat, it offers durable, reliable propane storage compatible with RVs, heaters, and trailers. Trusted by professionals, it combines safety, capacity, and industry-leading quality.

## Description

desertcart.com: Flame King YSN401 Steel Propane Tank Cylinder With Overflow Protection Device Valve, 40 Lb, White : Tools & Home Improvement

Review: Good tank - Arrived in good shape. A bit heavy once filled, but still able to maneuver it as needed. Bought these for use with my portable tri-fuel generator. Propane lasts forever whereas gasoline goes bad over time so I decided this was a good investment to store the propane until it's needed.
Review: Well made - Well made

## Features

- EMPTY TANK: Pre-purged vacuum ready for filling with propane; built from high-grade, welded steel and powder coated for rust prevention
- OVERFILL PREVENTION DEVICE: Comes with an OPD valve to prevent overfilling; required by law in most States, if your tank doesn't have this, most places won't fill it!
- SAFETY: X-ray and hydrostatic tested and DOT and Transport Canada certified so you can be sure to transport safely both in the US and CA
- SUIT YOUR NEEDS: With a standard-size connection valve, this large 40LB tank will connect as easily as smaller tanks, and work with RVs or trailers, propane tank attachable heaters, and other accessories.
- LEADING THE INDUSTRY: Flame King, a leader in propane storage solutions, prides itself on making the highest quality, premium, refillable propane tanks on the market. From 1lb up to 100lb tanks, we've got you covered

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B004LZN5ES |
| Best Sellers Rank | #16,693 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #10 in Heaters & Heater Accessories |
| Customer Reviews | 4.7 4.7 out of 5 stars (840) |
| Item Weight | 31.3 pounds |
| Item model number | YSN401 |
| Manufacturer | Flame King |
| Product Dimensions | 12 x 30 x 12 inches |

## Images

![Flame King YSN401 Steel Propane Tank Cylinder With Overflow Protection Device Valve, 40 Lb, White - Image 1](https://m.media-amazon.com/images/I/61ahwbNlHBL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Good tank
*by A***D on December 1, 2025*

Arrived in good shape. A bit heavy once filled, but still able to maneuver it as needed. Bought these for use with my portable tri-fuel generator. Propane lasts forever whereas gasoline goes bad over time so I decided this was a good investment to store the propane until it's needed.

### ⭐⭐⭐⭐⭐ Well made
*by T***H on January 18, 2026*

Well made

### ⭐⭐⭐⭐⭐ Heavy-Duty Tank That Does Its Job
*by E***N on December 11, 2025*

The Flame King 40-lb tank feels solid, filled easily, and the valve works smoothly. No leaks, no issues—just heavier to move around than smaller cylinders. So far it’s performed exactly the way I expected.

## Frequently Bought Together

- Flame King YSN401 Steel Propane Tank Cylinder With Overflow Protection Device Valve, 40 Lb, White
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- Flame King YSNPBS Propane Cylinder Base Stabilizer, Fits 20lb, 30lb, and 40lb Tanks, Black

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*Product available on Desertcart United States of America*
*Store origin: US*
*Last updated: 2026-03-08*