---
product_id: 480401456
title: "TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Upright Spray 1/2” NPT 155F (68C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze"
brand: "tuna"
price: "VT17509"
currency: VUV
in_stock: true
url: https://www.desertcart.vu/products/480401456-tuna-2-pack-fm-approved-and-ul-cul-listed-fire
store_origin: VU
region: Vanuatu
---

# Standard Response FM Approved Max Pressure 175psig TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Upright Spray 1/2” NPT 155F (68C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze

**Brand:** tuna
**Price:** VT17509
**Availability:** ✅ In Stock

## Summary

> 🔥 Protect What Matters Most with TUNA Sprinklers! 💧

## Quick Answers

- **What is this?** TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Upright Spray 1/2” NPT 155F (68C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze by tuna
- **How much does it cost?** VT17509 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.vu](https://www.desertcart.vu/products/480401456-tuna-2-pack-fm-approved-and-ul-cul-listed-fire)

## Best For

- tuna enthusiasts

## Why This Product

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

## Key Features

- • **Safety First:** FM Approved & UL/CUL Listed for peace of mind.
- • **Robust Design:** Constructed from durable bronze for long-lasting performance.
- • **Reliable Response:** Standard response with a 155F (68C) activation temperature.
- • **Effortless Installation:** 1/2” NPT threading for easy integration into existing systems.
- • **High Pressure Tolerance:** Max working pressure of 175psig ensures reliability.

## Overview

The TUNA FM Approved & UL/CUL Listed Fire Sprinkler Head is designed for automatic fire sprinkler systems, featuring a reliable 155F activation temperature and a robust bronze construction. With a maximum working pressure of 175psig, this sprinkler head ensures optimal performance and safety in any environment.

## Description

During a fire conditions, the thermal-sensitive liquid in the glass bulb expands, causing the bulb to shatter, releasing the button and spring seal assembly. Water flowing through the sprinkler orifice strikes the sprinkler deflector, forming a uniform spray pattern to extinguish or control the fire.Temperature Rating: 155°F (68°C)Discharge Coefficient: K=5.6(U.S) /80(Metric) Nominal Orifice Size:1/2"(15mm) Maximum Working Pressure:175psi(12bar) Min. Operating Pressure: 7psi (0.48bar) Factory Hydrostatic Test: 100%@ 500psi (34.5bar) NPT: National Pipe Tapered is common in plumbing and some industrial uses. Sometimes referred to as pipe thread because PVC pipe and schedule 40 pipe are typically threaded in NPT. As its name implies this is a tapered thread so that the outside diameter of the male (ODM) gets smaller towards the end of the fitting and the inside diameter of the female narrows with depth. As the two fittings are threaded together the opposite tapers force thread friction and makes the seal without the use of a gasket.

## Features

- FM Approved 3053441and UL / CUL listed EX6430. 1/2 " NPT (National National Pipe Thread) American thread fire sprinkler heads
- Underwriter Laboratories Listed, UL(United States) and ULC(Canada) Listed
- Nominal 5.6 K-Factor fire sprinkler heads, Dia5mm Glass Bulb Standard Response 155F 68C
- Max working pressure 175psig /1.2Mpa(12 bar);Factory Hydrostatic Test 100%@ 500psig (3.4Mpa)
- Automatic sprinklers of the frangible bulb type

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Product Dimensions | 3.3 x 3.3 x 5 cm; 132 g |
| Part number | NX023B2 |
| Material type | Bronze |
| Manufacturer | Tuna |
| Item model number | NX023 |
| ASIN | B08NYGYCCW |

## Product Details

- **Brand:** Tuna
- **Colour:** Bronze
- **Material:** Bronze
- **Style:** Fixed Spray
- **Item dimensions L x W x H:** 33 x 33 x 50 millimetres

## Images

![TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Upright Spray 1/2” NPT 155F (68C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze - Image 1](https://m.media-amazon.com/images/I/81+yu7-BarL.jpg)

## Available Options

This product comes in different **Pattern Name** options.

## Frequently Bought Together

- (2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Upright Spray 1/2” NPT 155°F (68°C) K=5.6 K80 Standard Response for Automatic Fire Sprinkler System Bronze
- Metal Magery Fire Sprinkler Spare Cabinet 6 Head Box for 1/2" and 3/4" Sprinkler Heads
- (2 Pack) FM Approved & UL/CUL Listed TUNA Fire Sprinkler Head Horizontal Sidewall Spray 1/2” NPT 155°F (68°C) K=5.6 Side Wall Spray K80 Standard Response for Automatic Fire Sprinkler System Chrome

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**Shop now:** [https://www.desertcart.vu/products/480401456-tuna-2-pack-fm-approved-and-ul-cul-listed-fire](https://www.desertcart.vu/products/480401456-tuna-2-pack-fm-approved-and-ul-cul-listed-fire)

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*Product available on Desertcart Vanuatu*
*Store origin: VU*
*Last updated: 2026-05-16*