--- product_id: 378667975 title: "TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Horizontal Sidewall Spray 1/2” NPT 155F (68C) K=5.6 Side Wall Spray K80 Standard Response for Automatic Fire Sprinkler System Chrome" brand: "tuna" price: "HK$450" currency: HKD in_stock: true category: "Tuna" url: https://www.desertcart.hk/products/378667975-tuna-2-pack-fm-approved-and-ul-cul-listed-fire store_origin: HK region: Hong Kong --- # K=5.6 discharge coefficient 155°F (68°C) activation temp 1/2” NPT tapered thread TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Horizontal Sidewall Spray 1/2” NPT 155F (68C) K=5.6 Side Wall Spray K80 Standard Response for Automatic Fire Sprinkler System Chrome **Brand:** tuna **Price:** HK$450 **Availability:** ✅ In Stock ## Summary > 🔥 Stay ahead of fire risks with precision-engineered protection! ## Quick Answers - **What is this?** TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Horizontal Sidewall Spray 1/2” NPT 155F (68C) K=5.6 Side Wall Spray K80 Standard Response for Automatic Fire Sprinkler System Chrome by tuna - **How much does it cost?** HK$450 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.hk](https://www.desertcart.hk/products/378667975-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 - • **Sleek Chrome Finish:** Modern chrome design blends seamlessly with professional spaces - • **Optimized Water Flow:** K=5.6 discharge coefficient ensures efficient, uniform spray coverage - • **Robust Pressure Handling:** Withstands up to 175 psi max working pressure for reliable performance - • **Certified Safety Assurance:** FM Approved & UL/CUL Listed for trusted, code-compliant protection - • **Precision Thermal Activation:** Glass bulb shatters exactly at 155°F to trigger rapid fire response ## Overview The TUNA 2-Pack Fire Sprinkler Heads feature FM Approval and UL/CUL listing, ensuring top-tier safety compliance. Designed with a 155°F glass bulb for precise thermal activation, these 1/2” NPT sidewall sprinklers deliver a K=5.6 discharge coefficient for optimal water flow. Built to handle pressures up to 175 psi and finished in sleek chrome, they provide reliable, automatic fire suppression with a modern aesthetic—perfect for professional environments demanding both safety and style. ## 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 fire sprinklers of the frangible bulb type ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08NYDVBQN | | Brand Name | Tuna | | Color | Chrome | | Customer Reviews | 4.2 4.2 out of 5 stars (23) | | Item Dimensions | 33 x 33 x 50 millimeters | | Manufacturer | Tuna | | Manufacturer Part Number | NX021C2 | | Material Type | Polyvinyl Chloride | | Maximum Flow Rate | 5.6 Liters Per Minute | | Maximum Pressure | 175 Pound per Square Inch | | Model Number | NX021 | | Number of Items | 1 | | Style Name | Automatic | | UPC | 705124113369 | | Unit Count | 2.0 Count | ## Product Details - **Brand:** Tuna - **Colour:** Chrome - **Item dimensions L x W x H:** 33 x 33 x 50 millimeters - **Material:** Polyvinyl Chloride - **Style:** Automatic ## Images ![TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Horizontal Sidewall Spray 1/2” NPT 155F (68C) K=5.6 Side Wall Spray K80 Standard Response for Automatic Fire Sprinkler System Chrome - Image 1](https://m.media-amazon.com/images/I/91ceVCeatrL.jpg) ![TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Horizontal Sidewall Spray 1/2” NPT 155F (68C) K=5.6 Side Wall Spray K80 Standard Response for Automatic Fire Sprinkler System Chrome - Image 2](https://m.media-amazon.com/images/I/71RV0hKkXrS.jpg) ![TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Horizontal Sidewall Spray 1/2” NPT 155F (68C) K=5.6 Side Wall Spray K80 Standard Response for Automatic Fire Sprinkler System Chrome - Image 3](https://m.media-amazon.com/images/I/51M73QceJUS.jpg) ![TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Horizontal Sidewall Spray 1/2” NPT 155F (68C) K=5.6 Side Wall Spray K80 Standard Response for Automatic Fire Sprinkler System Chrome - Image 4](https://m.media-amazon.com/images/I/71GhhqlpYIS.jpg) ![TUNA (2 Pack) FM Approved & UL/CUL Listed Fire Sprinkler Head Horizontal Sidewall Spray 1/2” NPT 155F (68C) K=5.6 Side Wall Spray K80 Standard Response for Automatic Fire Sprinkler System Chrome - Image 5](https://m.media-amazon.com/images/I/71kzM+wz1kL.jpg) ## Available Options This product comes in different **Pattern** options. ## Questions & Answers **Q: Are the ul /fm ratings legit, or is it fishy? (tuna brand lol) ... if legit, please post a link to the certifications.** A: FM certificate: Search 3053441in www.approvalguide.com after log in UL certificate: Search EX6430 in https://iq.ulprospector.com after log in **Q: Do you realize the manufacturer has acknowledged that their products are falsified fm approved?** A: I was not aware of this. I will have to address it . Surprised they are still on Amazon. ## Frequently Bought Together - (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 - 5pc Fire Sprinkler Head & Wrench, Pendent Type 155℉ Fire Sprinkler Heads 1/2" NPT Thread 68°C Quick Response Spray Down for Home/Commericial/Workshop/Residential/Factory (Pendent Type) - 5pc Fire Sprinkler Head & Wrench, 1/2 Inch 155℉ Upright Sprinklers K80 Water Spray Up 68°C Quick Response 1/2 NPT Thread for Home/Commerical/Residential Replacement (Upright Type) --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.hk/products/378667975-tuna-2-pack-fm-approved-and-ul-cul-listed-fire](https://www.desertcart.hk/products/378667975-tuna-2-pack-fm-approved-and-ul-cul-listed-fire) --- *Product available on Desertcart Hong Kong* *Store origin: HK* *Last updated: 2026-06-22*