---
product_id: 59620170
title: "Water Flow Switch 3/4\" SPDT HFS-20 Cooling System Water Paddle Flow Control Switch AC 250V 16A"
brand: "woljay"
price: "20059 Ft"
currency: HUF
in_stock: true
reviews_count: 2
category: "Woljay"
url: https://www.desertcart.hu/products/59620170-water-flow-switch-3-4-spdt-hfs-20-cooling-system
store_origin: HU
region: Hungary
---

# 16A high current rating 3/4" pipe compatibility SPDT rotary switch Water Flow Switch 3/4" SPDT HFS-20 Cooling System Water Paddle Flow Control Switch AC 250V 16A

**Brand:** woljay
**Price:** 20059 Ft
**Availability:** ✅ In Stock

## Summary

> 💧 Stay in control with every drop – flow smart, cool smarter!

## Quick Answers

- **What is this?** Water Flow Switch 3/4" SPDT HFS-20 Cooling System Water Paddle Flow Control Switch AC 250V 16A by woljay
- **How much does it cost?** 20059 Ft with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.hu](https://www.desertcart.hu/products/59620170-water-flow-switch-3-4-spdt-hfs-20-cooling-system)

## Best For

- woljay enthusiasts

## Why This Product

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

## Key Features

- • **Easy Integration:** Screw terminal connectors and SPDT switch type for seamless system compatibility
- • **Durable & Certified:** IP54 rated with CE, ETL, and UL certifications for dependable performance
- • **Precision Flow Detection:** Rotary paddle actuator ensures accurate water flow monitoring
- • **Versatile Mounting Options:** Fits both horizontal and vertical pipelines for flexible installation
- • **Reliable High-Current Handling:** Supports up to 16 Amps at 250V for robust cooling system control

## Overview

The Woljay HFS-20 Water Flow Switch is a 3/4" SPDT paddle flow control device designed for air conditioning and cooling systems. Rated for 16A at 250V, it features a rotary actuator and IP54 protection, ensuring reliable automatic operation in both horizontal and vertical pipe setups. Certified by CE, ETL, and UL, it offers durable performance with easy screw terminal connectivity.

## Description

Woljay Water Flow switch 3/4" SPDT HFS-20 Cooling System Water Paddle Flow Control Switch AC 250V 16A

Review: Requires a lot of flow to trigger - The paddle arm was too long for 3/4" pipe - it bottomed out inside the tee. Also, even on the lightest spring setting, I couldn't get the switch to trip even with 7 GPM flowing. I'm going to try to salvage some parts, but I may have to make some major modifications to get it to work.
Review: Five Stars - Going to install it soon

## Features

- Product name: paddle flow switch; model : HFS-20; Switch Type : SPDT
- Can be mounted with a horizontal pipe line or vertical pipeline for the air conditioner
- Air-conditioner Water/Paddle
- Size: 120 x 85 x 65mm/ 4.7" x 3.35" x 2.6"(L*W*H)
- Package Content :1x Paddle Flow Switch

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B071958T22 |
| Actuator Type | Rotary |
| Brand | Woljay |
| Brand Name | Woljay |
| Circuit Type | 2-way |
| Color | Red |
| Connectivity Protocol | X-10 |
| Connector Type | Screw Terminals |
| Contact Material | Stainless Steel |
| Contact Type | Normally Open |
| Control Method | Touch |
| Current Rating | 16 Amps |
| Customer Reviews | 2.9 out of 5 stars 2 Reviews |
| International Protection Rating | IP54 |
| Manufacturer | Woljay |
| Model | HFS-20 |
| Mounting Type | Tabletop |
| Number of Items | 1 |
| Operating Voltage | 250 Volts |
| Operation Mode | automatic |
| Specification Met | CE, ETL, UL |
| Switch Type | Flow Switch |
| Terminal | Spdt |
| UPC | 738920634011 |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Woljay
- **Circuit Type:** 2-way
- **Connector Type:** Screw Terminals
- **Contact Type:** Normally Open
- **Current Rating:** 16 Amps
- **Mounting Type:** Tabletop
- **Operating Voltage:** 250 Volts
- **Operation Mode:** automatic
- **Switch Type:** Flow Switch
- **Terminal:** Spdt

## Images

![Water Flow Switch 3/4" SPDT HFS-20 Cooling System Water Paddle Flow Control Switch AC 250V 16A - Image 1](https://m.media-amazon.com/images/I/61F212S2vyL.jpg)

## Questions & Answers

**Q: This switch it is normal open or normal close?**
A: open

**Q: Does the switch come with paddles?**
A: Yes.  Mine came with a few different lengths.

## Customer Reviews

### ⭐⭐ Requires a lot of flow to trigger
*by T***P on June 18, 2021*

The paddle arm was too long for 3/4" pipe - it bottomed out inside the tee. Also, even on the lightest spring setting, I couldn't get the switch to trip even with 7 GPM flowing. I'm going to try to salvage some parts, but I may have to make some major modifications to get it to work.

### ⭐⭐⭐⭐⭐ Five Stars
*by R***S on February 10, 2018*

Going to install it soon

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*Product available on Desertcart Hungary*
*Store origin: HU*
*Last updated: 2026-02-28*