---
product_id: 7759351
title: "Tecmark Spa 3902 Series Universal Pressure Switch 1 Amp w/Out Brass Fittings 3902"
brand: "advantage"
price: "€ 43.21"
currency: EUR
in_stock: true
reviews_count: 8
url: https://www.desertcart.sk/products/7759351-tecmark-spa-3902-series-universal-pressure-switch-1-amp-w
store_origin: SK
region: Slovakia
---

# Water Resistant Universal Fit 1 Amp Power Tecmark Spa 3902 Series Universal Pressure Switch 1 Amp w/Out Brass Fittings 3902

**Brand:** advantage
**Price:** € 43.21
**Availability:** ✅ In Stock

## Summary

> 🔌 Power Up Your Projects with Confidence!

## Quick Answers

- **What is this?** Tecmark Spa 3902 Series Universal Pressure Switch 1 Amp w/Out Brass Fittings 3902 by advantage
- **How much does it cost?** € 43.21 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.sk](https://www.desertcart.sk/products/7759351-tecmark-spa-3902-series-universal-pressure-switch-1-amp-w)

## Best For

- advantage enthusiasts

## Why This Product

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

## Key Features

- • **Robust Durability:** Built to withstand harsh conditions, ensuring longevity.
- • **Reliable Performance:** Consistent pressure regulation for peace of mind in your operations.
- • **Precision Engineering:** Designed for optimal performance in various applications.
- • **Versatile Compatibility:** Easily integrates with multiple systems for seamless operation.
- • **User-Friendly Installation:** Quick and easy setup, perfect for both professionals and DIY enthusiasts.

## Overview

The Tecmark Spa 3902 Series Universal Pressure Switch is a high-performance device designed to regulate pressure in various applications. With a 1 Amp capacity and universal compatibility, it ensures a reliable fit and operation, making it an essential tool for both professionals and DIY enthusiasts.

## Description

Tecmark Spa 3902 Series Universal Pressure Switch 1 Amp w/Out Brass Fittings 3902

## Features

- To ensure a proper fit check with your product manufacture or technician.
- Tecmark Pressure Switch Part # 3902

## Product Details

- **Operation Mode:** OFF-NONE-ON
- **Current Rating:** 1 Amps
- **Operating Voltage:** 1 Volts
- **Contact Type:** Normally Open
- **Connector Type:** Clamp
- **Brand:** Advantage
- **Terminal:** Blade
- **Item dimensions L x W x H:** 3 x 4 x 7 inches
- **Circuit Type:** 1-way
- **Actuator Type:** Pressure Sensitive

## Images

![Tecmark Spa 3902 Series Universal Pressure Switch 1 Amp w/Out Brass Fittings 3902 - Image 1](https://m.media-amazon.com/images/I/61AO4KJRUUL.jpg)

## Questions & Answers

**Q: Is this 1/4" npt? And what is the psi rating if using it as an air switch?**
A: 1/8 npt

**Q: Is there a way to test if this unit has gone bad? Im trying to fix a non heating tub**
A: This is a pressure switch that senses when there is pressure in the line.  If no pressure, then switch opens and shuts off the heater so it doesn’t burn up.  So if you turn on your spa and water is circulating, and the switch reads open with an ohm meter, then It’s bad.

**Q: I needed to set the psi at 1.5 but didn't.  can i still adjust it after it is installed?**
A: Yes, it can be adjusted after installed but you won't know the pressure unless you have a pressure guage in the pipe line. This isn't critical for spa use. You just want the heater to shut off when the water flow / pump fails. In my case I have a relay that I hear click when the pressure is good.

**Q: Will this work on an arctic spa?**
A: Yes these are pretty much universal

## Customer Reviews

### ⭐⭐⭐⭐⭐ Old Nordic Warrior S-Class up and running!
*by K***I on August 21, 2021*

This "universal" pressure switch fixed my FLC error, even though it wasn't the 'Dtec-1' in the parts manual for my S-Class Gecko spa pack. I assume Covid supply issues are to blame, but more than one spa part sites could not fulfill my pressure switch order even though listed as 'in stock' but wasn't. SO grateful RDW had this one (had to manipulate a bit to fit as it was larger in diameter than the previous failed switch) but thrilled to be up and running again! Thank you RDW and Amazon for an old hot tub that's hot again! :)Edit: Wanted to add after my initial repair/review that this pressure switch is adjustable from 1-5 PSI, and the S-Class needs 2 PSI and required 1 and 1/4 rotation clockwise to function correctly. Went 1 and 1/2 turns for the FLC error to stop, then back tracked to 1 and 1/4 rotation and running fine. Going counter clockwise kept me at FLC error, so clockwise is the way to go to get to 2 PSI. ;) Good luck to us all patching together our old tubs! :D*UPDATE March 2024: This pressure switch is still functioning flawlessly in my ancient Nordic Warrior hot tub...just thought I'd share! :D

### ⭐⭐⭐⭐⭐ Worked perfect
*by D***L on June 19, 2024*

Installed in hot tub and it.took care or the 3 dot error I was getting thanks for a great price and great product

### ⭐⭐⭐⭐⭐ Works for older Nordic Warrior Hot Tub
*by R***H on February 22, 2020*

Not the products fault but not easy to install without emptying your hot tub. I did it by closing the two gate valves, loosing the two heater ends (letting them leak some of the water), taking wires off heater (power off of course) and then swiveling the heater so the pressure switch faces out instead of up. The old one looked pretty calcified (from small leak I assume) and thought it would be hard to remove (no real place for a wrench?) ended up could take off with just my hand. Water still came out pretty strong but was able to get the new one on pretty quick. Still everything got somewhat wet. Let it dry ( 37*) (open the gates and put wires back on) for a couple of hours, turned on the power and hot tub surged on and off, control panel not working, quickly turned off power thinking I might of screwed up the electronic board? Put a small space heater underneath closed up and crossed my fingers. Let it really dry everything out for about 3 hours, then started Yea! Everything works the blinking three light don't come on anymore!

## Frequently Bought Together

- Tecmark Spa 3902 Series Universal Pressure Switch 1 Amp w/Out Brass Fittings 3902
- Spa Components Replacement 5.5kW Spa Heater, 15in x 2in, 240V, B24055R Compatible with Sundance / B24055Q
- Impresa 4 Pack Spa Hot Tub Pump Heater Union Gasket/O-Ring - 2.2'' ID 3'' OD'' Flat Gasket Works on Variety of Spas

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**Shop now:** [https://www.desertcart.sk/products/7759351-tecmark-spa-3902-series-universal-pressure-switch-1-amp-w](https://www.desertcart.sk/products/7759351-tecmark-spa-3902-series-universal-pressure-switch-1-amp-w)

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*Product available on Desertcart Slovakia*
*Store origin: SK*
*Last updated: 2026-02-03*