--- product_id: 381235118 title: "Upright fire sprinkler head" brand: "tuna" price: "₨32968" currency: LKR in_stock: true reviews_count: 1 category: "Tuna" url: https://www.desertcart.lk/products/381235118-upright-fire-sprinkler-head store_origin: LK region: Sri Lanka --- # 5.6 K-Factor optimal flow 155°F thermal activation 1/2" NPT tapered threading Upright fire sprinkler head **Brand:** tuna **Price:** ₨32968 **Availability:** ✅ In Stock ## Summary > 🔥 Stay ahead of fire risks with precision-engineered protection! ## Quick Answers - **What is this?** Upright fire sprinkler head by tuna - **How much does it cost?** ₨32968 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.lk](https://www.desertcart.lk/products/381235118-upright-fire-sprinkler-head) ## 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 - • **Reliable Water Flow:** Nominal 5.6 K-Factor ensures efficient and uniform spray coverage - • **Seamless Installation:** Standard 1/2" NPT tapered threads for secure, leak-free plumbing fit - • **Robust Pressure Handling:** Max working pressure of 175 psi with factory-tested 500 psi durability - • **Certified Safety Assurance:** FM Approved & UL/ULC Listed for trusted, code-compliant protection - • **Precision Thermal Activation:** Glass bulb shatters exactly at 155°F to trigger rapid fire response ## Overview The Upright Fire Sprinkler Head by Tuna is a bronze, fixed spray sprinkler featuring a 5mm glass bulb that activates at 155°F. It delivers a nominal 5.6 K-Factor water flow through a 1/2" NPT tapered thread connection, supporting a maximum working pressure of 175 psi and factory hydrostatic testing at 500 psi. FM Approved and UL/ULC listed, it guarantees reliable, code-compliant fire suppression for professional-grade safety. ## 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. Review: This product is excellent! It shipped fast! ## 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 | |---------------|-------| | ASIN | B08NYGYCCW | | Brand Name | Tuna | | Color | Bronze | | Customer Reviews | 4.7 4.7 out of 5 stars (30) | | Inlet Connection Size | 0.5 Inches | | Item Dimensions | 33 x 33 x 50 millimeters | | Manufacturer | Tuna | | Manufacturer Part Number | NX023B2 | | Material Type | Bronze | | Maximum Flow Rate | 5.6 Gallons Per Minute | | Maximum Pressure | 175 Pound per Square Inch | | Model Number | NX023 | | Number of Items | 2 | | Smart Home Compatibility | Not Smart Home Compatible | | Style Name | Fixed Spray | | UPC | 705124113376 | | Unit Count | 2 Count | ## Product Details - **Brand:** Tuna - **Colour:** Bronze - **Item dimensions L x W x H:** 33 x 33 x 50 millimeters - **Material:** Bronze - **Style:** Fixed Spray ## Images ![Upright fire sprinkler head - Image 1](https://m.media-amazon.com/images/I/81+yu7-BarL.jpg) ![Upright fire sprinkler head - Image 2](https://m.media-amazon.com/images/I/71IaRPqPuBS.jpg) ![Upright fire sprinkler head - Image 3](https://m.media-amazon.com/images/I/51C1db-xOOS.jpg) ![Upright fire sprinkler head - Image 4](https://m.media-amazon.com/images/I/61A+SDVNw6S.jpg) ![Upright fire sprinkler head - Image 5](https://m.media-amazon.com/images/I/71fXyLGaZxL.jpg) ## Available Options This product comes in different **Pattern** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Review *by S***S on 10 December 2020* This product is excellent! It shipped fast! ## 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 --- ## 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.lk/products/381235118-upright-fire-sprinkler-head](https://www.desertcart.lk/products/381235118-upright-fire-sprinkler-head) --- *Product available on Desertcart Sri Lanka* *Store origin: LK* *Last updated: 2026-05-23*