---
product_id: 53447346
title: "Quadrafire Vacuum Low Draft Negative Pressure Switch Sensor SRV7000-531 - OEM"
brand: "quadrafire"
price: "C$5267"
currency: NIO
in_stock: true
reviews_count: 8
category: "Quadrafire"
url: https://www.desertcart.ni/products/53447346-quadrafire-vacuum-low-draft-negative-pressure-switch-sensor-srv7000-531
store_origin: NI
region: Nicaragua
---

# Includes Both Hoses & Spade Connectors Differential Vacuum Pressure Switch Made in USA with 90-day warranty Quadrafire Vacuum Low Draft Negative Pressure Switch Sensor SRV7000-531 - OEM

**Brand:** quadrafire
**Price:** C$5267
**Availability:** ✅ In Stock

## Summary

> 🔥 Keep your fire burning strong with precision vacuum sensing! ⚙️

## Quick Answers

- **What is this?** Quadrafire Vacuum Low Draft Negative Pressure Switch Sensor SRV7000-531 - OEM by quadrafire
- **How much does it cost?** C$5267 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ni](https://www.desertcart.ni/products/53447346-quadrafire-vacuum-low-draft-negative-pressure-switch-sensor-srv7000-531)

## Best For

- quadrafire enthusiasts

## Why This Product

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

## Key Features

- • **Safety-First Operation:** Automatically disables auger feed motor if unsafe vacuum conditions are detected
- • **Durable & Reliable Build:** Plastic housing with brass contacts designed for long-lasting operation under 300W load
- • **Seamless OEM Compatibility:** Direct replacement for all previous Quadra-fire vacuum switches, ensuring hassle-free installation
- • **Precision Airflow Monitoring:** Senses air flow/restriction in firebox & exhaust for optimal stove performance
- • **Made in the USA with Confidence:** Backed by a 90-day manufacturer warranty and no-hassle replacement guarantee

## Overview

The Quadrafire Vacuum Low Draft Negative Pressure Switch Sensor SRV7000-531 is a high-precision differential vacuum pressure switch designed to monitor airflow and restrictions within your stove’s firebox, exhaust, vent pipe, and fuel hopper. Compatible with a wide range of Quadra-Fire, Heatilator, and Pleasant Hearth models, this OEM replacement part ensures safe and efficient stove operation by controlling the auger feed motor based on vacuum conditions. Made in the USA with durable materials and backed by a 90-day warranty, it includes both hoses and spade connectors for easy installation.

## Description

Quadra-Fire, Heatilator, Pleasant Hearth Vacuum Switch Fits Quadra-Fire Models: ~ 800 ~ 1000 ~ 1100I ~ Castile FS ~ Castile Insert ~ Santa Fe FS ~ Santa Fe B ~ Santa Fe Insert ~ Classic Bay 1200 FS – CB1200 ~ Classic Bay Insert – CB1200I ~ Contour ~ Original Mt Vernon – 4 Spd Control ~ Mt Vernon AE FS ~ Mt Vernon AE Insert ~ Mt. Vernon E2 FS ~ Mt. Vernon E2 Insert ~ Edge 60 Insert Fits Heatilator & Pleasant Hearth Models: ~ Eco-Choice PS35 – PH35 ~ Eco- Choice PS50 – PH50 ~ Eco-Choice CAB50 Part Numbers: ~ Part# SRV7000-531. Replaces all previous Quadra-fire vacuum switches, including SRV7000-166, 812-3430, 812-1990 and SRV7000-447 Specs: ~ Differential Vacuum Pressure Switch, Includes Both Hoses ~ Senses air flow/restriction within the firebox, exhaust chamber, vent pipe and fuel hopper on select models. ~ The vacuum switch runs in circuit with the feed system. If the vacuum switch is faulty or senses a safety issue it will not allow the auger feed motor to operate. ~ Guaranteed HHT/Quadra-Fire OEM Part ~ 90 day manufacturer warranty with our no hassle replacement guarantee ~ Made in the USA

Review: Works for Quadrafire Castile - So far so good. I have a circa 2005 Quadrafire Castile. Symptom was that after initial feed and fire ignites, second stage of auger feed does not begin, and fire goes out. Original Vacuum switch part DFS-221-271 failed in 2019. Got OEM replacement part DFS-221-347. That switch worked for five years, but same problem happened again. This new part has different form factor (round instead of square) and plastic rather than metal, so wasn’t sure if it would work, but got it installed, and unit is working again just in time for colder weather. Red wire on + and orange wire on -. Hope this info helps others troubleshooting their stove.
Review: Price - Awesome

## Features

- Quadrafire Vacuum Low Draft Negative Pressure Switch Sensor SRV7000-531
- Part# SRV7000-531. Replaces all previous Quadra-fire vacuum switches, including SRV7000-166, 812-3430, 812-1990 and SRV7000-447
- Differential Vacuum Pressure Switch, Includes Both Hoses
- Senses air flow/restriction within the firebox, exhaust chamber, vent pipe and fuel hopper on select models.
- Made in USA - 90 day manufacturer warranty with our no hassle replacement guarantee

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B076BWJQPH |
| Actuator Type | Plunger |
| Best Sellers Rank | #418,577 in Home & Kitchen ( See Top 100 in Home & Kitchen ) #139 in Fireplace Replacement Parts |
| Brand | Quadrafire |
| Brand Name | Quadrafire |
| Circuit Type | 1-way |
| Connectivity Protocol | X-10 |
| Connector Type | Spade Connectors and Hose Nozel |
| Contact Material | Brass |
| Contact Type | Normally Open |
| Control Method | Remote |
| Customer Reviews | 4.6 out of 5 stars 197 Reviews |
| International Protection Rating | IP00 |
| Item Weight | 5.6 ounces |
| Manufacturer | HHT |
| Material Type | Plastic |
| Model | SRV7000-531 |
| Mounting Type | vent |
| Number of Items | 1 |
| Number of Positions | 1 |
| Operation Mode | automatic |
| Specification Met | UL |
| Switch Type | Flow Switch, Pressure Switch |
| Terminal | Screw |
| UPC | 850745008102 |
| Unit Count | 1.0 Count |
| Wattage | 300 watts |

## Product Details

- **Actuator Type:** Plunger
- **Brand:** Quadrafire
- **Circuit Type:** 1-way
- **Connector Type:** Spade Connectors and Hose Nozel
- **Contact Type:** Normally Open
- **Material:** Plastic
- **Mounting Type:** vent
- **Operation Mode:** automatic
- **Switch Type:** Flow Switch, Pressure Switch
- **Terminal:** Screw

## Images

![Quadrafire Vacuum Low Draft Negative Pressure Switch Sensor SRV7000-531 - OEM - Image 1](https://m.media-amazon.com/images/I/617c2Zfd3iL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works for Quadrafire Castile
*by M***7 on November 12, 2025*

So far so good. I have a circa 2005 Quadrafire Castile. Symptom was that after initial feed and fire ignites, second stage of auger feed does not begin, and fire goes out. Original Vacuum switch part DFS-221-271 failed in 2019. Got OEM replacement part DFS-221-347. That switch worked for five years, but same problem happened again. This new part has different form factor (round instead of square) and plastic rather than metal, so wasn’t sure if it would work, but got it installed, and unit is working again just in time for colder weather. Red wire on + and orange wire on -. Hope this info helps others troubleshooting their stove.

### ⭐⭐⭐⭐⭐ Price
*by S***S on February 16, 2026*

Awesome

### ⭐⭐⭐⭐⭐ My Vernon fix
*by J***P on December 11, 2025*

Perfect for my Vernon quadra fire. Original.

## Frequently Bought Together

- Quadrafire Vacuum Low Draft Negative Pressure Switch Sensor SRV7000-531 - OEM
- Quadrafire Limit Snap Disc Switch #2 - Castile, Sante fe SRV7000-268 812-0320 FC
- Quadra-Fire Replacement Manual Reset Snap Disc #3

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*Product available on Desertcart Nicaragua*
*Store origin: NI*
*Last updated: 2026-04-22*