---
product_id: 298162043
title: "2-Stage Auto Changeover Regulator"
brand: "flame king"
price: "€ 63.29"
currency: EUR
in_stock: null
reviews_count: 8
url: https://www.desertcart.de/products/298162043-2-stage-auto-changeover-regulator
store_origin: DE
region: Germany
---

# 2-stage auto tank switch 345,200 BTU power 1/4" SAE & 3/8" NPT fittings 2-Stage Auto Changeover Regulator

**Brand:** flame king
**Price:** € 63.29
**Availability:** ❌ Out of Stock

## Summary

> 🔥 Keep your RV fueled and your adventures unstoppable!

## Quick Answers

- **What is this?** 2-Stage Auto Changeover Regulator by flame king
- **How much does it cost?** € 63.29 with free shipping
- **Is it available?** Currently out of stock
- **Where can I buy it?** [www.desertcart.de](https://www.desertcart.de/products/298162043-2-stage-auto-changeover-regulator)

## 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

- • **Built for Safety:** High-strength thread-locker ensures leak-free, worry-free use.
- • **Seamless Propane Flow:** Switch tanks without missing a beat—never run out mid-adventure.
- • **UL Listed Reliability:** Certified quality and performance you can trust on the road.
- • **Plug & Play Compatibility:** Works perfectly with Flame King hoses and pigtails for easy setup.
- • **Dual-Stage Pressure Control:** Consistent flame, no matter the demand or conditions.

## Overview

The Flame King ACR-2a is a UL-listed 2-stage propane regulator designed for RVs, vans, and trailers with dual propane tanks. It automatically switches from the empty primary tank to the reserve without interrupting gas flow, maintaining a steady pressure of 11" WC. Featuring 1/4" SAE inverted flare inlets and a 3/8" NPT outlet, it ensures safe, leak-free operation with high-strength thread-locker assembly. Compact and reliable, it’s engineered for seamless, worry-free propane management on the go.

## Description

Flame King ACR-2a 2-Stage Auto Changeover LP Propane Gas Regulator for RVs, Vans, and Trailers (Without Pigtails)

## Features

- Allows removal of an empty cylinder for refill without interrupting the propane supply
- For RVs with dual propane tanks, it automatically switches from the primary tank to the reserve tank when the primary is empty
- UL LISTED: Inlets are 1/4" SAE inverted flare, and the outlet is 3/8" NPT female pipe thread; rated for 345,200 BTU
- Double-stage design maintains constant gas pressure under changing demand and conditions; the regulator is factory set at 11" WC (water column); lockout pressure is up to 14.9" WC
- Compatible with Flame King's 48-inch Thermo Plastic Hose (Model 100383-48) and 12-18 inch INVERTED FLARE Pigtails (Models E12INPT, E15INPT, or E18INPT)
- For your safety and to ensure leak-free performance, these regulators are assembled using high-strength thread-locker (Loctite) on the adapter connections where the pigtails are attached. This is an intentional safety measure designed to keep critical fittings secure and prevent gas leaks during use.
- Note: NPT pigtails are not recommended.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | Flame King |
| Brand | Flame King |
| Model | ACR-2a |
| Item Weight | 1.74 pounds |
| Product Dimensions | 7 x 4 x 4 inches |
| Item model number | ACR-2a |
| Exterior | Machined |
| Manufacturer Part Number | ACR-2a |

## Images

![2-Stage Auto Changeover Regulator - Image 1](https://m.media-amazon.com/images/I/71t9EDMwSqL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Get this regulator if you heat a greenhouse!
*by C***. on March 14, 2025*

This regulator is a game changer for northern gardeners!! Being in a cold area, one of my biggest fears when starting summer crops (starting in February) in the greenhouse is running out of propane and losing heating! Not anymore! I have the regulator hooked up to 2 100lb propane tanks. It worked flawlessly when they empty. Indicator turns red as advertised; the other tank takes over. There was no interruption of the propane flow to the heater. HIGHLY recommend to anyone that heats a greenhouse!

### ⭐⭐⭐⭐⭐ Would recommend
*by P***G on March 22, 2025*

I used this on my Camping trailer. Old one crapped out and I bought this. The setup for the lines to the tanks was different than my old one and I had to buy some adapters. So far it has worked great. No leaks. Seems durable enough. Been a year and so far no issues. Would recommend

### ⭐⭐⭐⭐⭐ Propane switch
*by B***G on April 2, 2025*

Perfect fit

## Frequently Bought Together

- Flame King ACR-2a 2-Stage Auto Changeover LP Propane Gas Regulator for RVs, Vans, and Trailers (Without Pigtails)
- Flame King (KT12ACR-2) 2-Stage Auto Changeover LP Propane Gas Regulator With Two 12 Inch Pigtails For RVs, Vans, Trailers
- Flame King Propane Thermo Plastic Rubber Hose Assembly, 48-inch, 3/8-inch ID for RVs and Travel Trailers

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**Shop now:** [https://www.desertcart.de/products/298162043-2-stage-auto-changeover-regulator](https://www.desertcart.de/products/298162043-2-stage-auto-changeover-regulator)

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*Product available on Desertcart Germany*
*Store origin: DE*
*Last updated: 2026-01-31*