---
product_id: 56795840
title: "Monessen Ventfree Fireplace Natural Gas Millivolt Valve 14D0467 SIT 0820637"
brand: "monessen"
price: "¥65426"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/56795840-monessen-ventfree-fireplace-natural-gas-millivolt-valve-14d0467-sit-0820637
store_origin: JP
region: Japan
---

# Valve number 0820637 Ventless design M8 Metric Thread Monessen Ventfree Fireplace Natural Gas Millivolt Valve 14D0467 SIT 0820637

**Brand:** monessen
**Price:** ¥65426
**Availability:** ✅ In Stock

## Summary

> 🔥 Ignite Your Comfort with Style!

## Quick Answers

- **What is this?** Monessen Ventfree Fireplace Natural Gas Millivolt Valve 14D0467 SIT 0820637 by monessen
- **How much does it cost?** ¥65426 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/56795840-monessen-ventfree-fireplace-natural-gas-millivolt-valve-14d0467-sit-0820637)

## Best For

- monessen enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** Built with safety features to provide peace of mind while you enjoy your cozy ambiance.
- • **Eco-Friendly Heating:** Enjoy the warmth of a ventless fireplace while reducing your carbon footprint.
- • **Seamless Integration:** Easily replace your existing valve with the 0820637 model for a hassle-free upgrade.
- • **Precision Engineering:** Crafted with a course thread thermocouple for reliable performance and safety.
- • **Versatile Compatibility:** Designed for natural gas use, ensuring a perfect fit for your sealed glass fireplace.

## Overview

The Monessen Ventfree Fireplace Natural Gas Millivolt Valve 14D0467 SIT 0820637 is a high-performance valve designed for seamless integration into your ventless fireplace system. With its eco-friendly heating capabilities and precision engineering, this valve ensures reliable performance while enhancing your home’s ambiance. Perfect for natural gas applications, it’s the ideal choice for those looking to upgrade their fireplace with safety and style.

## Description

MonessenVentfree Fireplace Natural Gas Millivolt Valve 14D0467 SIT 0820637

## Features

- For Natural Gas, If you have a sealed glass fireplace this will not work.
- Ventfree, Ventless, Unvented Logs
- Valve number 0820637, verify it matches yours
- Course Thread Thermocouple M8 Metric Thread
- Compare your valve number, there are several models

## Images

![Monessen Ventfree Fireplace Natural Gas Millivolt Valve 14D0467 SIT 0820637 - Image 1](https://m.media-amazon.com/images/I/91L0r-WLHpL.jpg)

## Questions & Answers

**Q: How do i know if i have a bad valve?**
A: Most people replace the fireplace valve for one of two reasons: first - the pilot light will not stay on when you release the pilot knob, and second - the valve will not turn the main burner on when the switch is engaged. Before you replace your valve, make sure you do the following things. Clean and blow out the pilot flame assembly so that it has a really strong flame heating the thermocouple and thermopile. Change your thermocouple if the pilot will not stay lit, even after holding it for several minutes. Change the thermopile if the valve will not open and ignite the main burner. Rule out bad wiring or control device (switch, remote control, thermostat) by bypassing the device.  To bypass, touch a small jumper wire to the TH and THTP terminals on the valve. This will open the valve and allow the main burner to ignite. Only replace the valve when everything else has been tried

**Q: How it works without electricity.**
A: This is a low voltage valve that get it's power from the heat from the pilot light using a thermopile.

**Q: What is the max btu this valve will allow?**
A: This model is used on vent free product which are capped at 40,000 BTU. If you are looking for a valve for vented products with higher BTU look at 0820652.

**Q: Is there a way to convert an lp log to natural gas ?? my valve is a sit-820 0820642**
A: I would not covert a ventless product. You are better off buying the complete burner in the correct gas.

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**Shop now:** [https://www.desertcart.jp/products/56795840-monessen-ventfree-fireplace-natural-gas-millivolt-valve-14d0467-sit-0820637](https://www.desertcart.jp/products/56795840-monessen-ventfree-fireplace-natural-gas-millivolt-valve-14d0467-sit-0820637)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-10-03*