--- product_id: 52389645 title: "Flamco Flexvent 1/2\" Floatvent c/w shut-off valve - Automatic Air Vent 27740" brand: "flamco" price: "€ 50.38" currency: EUR in_stock: true reviews_count: 13 category: "Flamco" url: https://www.desertcart.at/products/52389645-flamco-flexvent-1-2-floatvent-c-w-shut-off-valve store_origin: AT region: Austria --- # Automatic air vent with float valve Operates up to 120°C peak temp Compact 1/2" threaded design Flamco Flexvent 1/2" Floatvent c/w shut-off valve - Automatic Air Vent 27740 **Brand:** flamco **Price:** € 50.38 **Availability:** ✅ In Stock ## Summary > 💨 Keep your system flawless—vent smart, heat smarter! ## Quick Answers - **What is this?** Flamco Flexvent 1/2" Floatvent c/w shut-off valve - Automatic Air Vent 27740 by flamco - **How much does it cost?** € 50.38 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.at](https://www.desertcart.at/products/52389645-flamco-flexvent-1-2-floatvent-c-w-shut-off-valve) ## Best For - flamco enthusiasts ## Why This Product - Trusted flamco brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Compact & Versatile:** Slim 23x3x80 cm profile fits effortlessly in tight spaces and various heating systems. - • **Seamless Air Removal:** Automatically vents trapped air to optimize heating efficiency and prevent cold spots. - • **Robust Pressure Handling:** Withstands up to 10 bar peak pressure, ensuring reliable performance under demanding conditions. - • **Durable Brass Construction:** Premium brass finish resists corrosion, guaranteeing long-lasting durability and leak-free operation. - • **Easy Installation & Maintenance:** Threaded 1/2" male connection with shut-off valve simplifies setup and servicing. ## Overview The Flamco Flexvent 1/2" Floatvent 27740 is a high-performance automatic air vent designed for residential heating systems. Featuring a compact brass body, it supports glycol mixtures up to 50%, operates safely up to 120°C and 10 bar pressure, and includes a shut-off valve for easy maintenance. Tested for quality and engineered for seamless air removal, it ensures optimal heating efficiency and system longevity. ## Description Free delivery and returns on all eligible orders. Shop Flamco Flexvent 1/2" Floatvent c/w shut-off valve - Automatic Air Vent 27740. Review: Nice - Does the job, fitted to the top of a wall heated towel rad, that got all the air buildup. So yes ok Review: Good product. Easy to install - These are good bleed valves. ## Features - The Flamco Flexvent 1/2 inch vent valve is suitable for house installations with a glycol content of up to 50%. - Thanks to its extremely compact shape, the Flexvent 1/2 inch bleed valve can be easily installed in any system that can be installed at a temperature below 90°C (with a peak of max. 120°C) and a pressure of 6 bar (with a peak of max. 10 bar). - As a quality guarantee, every Flamco nozzle is tested before it leaves our factory. - The Flexvent seal seat is protected from dirt as the protective chamber is placed on the float ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00GXNNGPY | | Best Sellers Rank | 127,789 in DIY & Tools ( See Top 100 in DIY & Tools ) 1,075 in Central Heating System Accessories | | Brand | Flamco | | Connector Type | Threaded | | Customer Reviews | 4.5 out of 5 stars 1,255 Reviews | | Exterior Finish | Brass | | Exterior finish | Brass | | Included Components | No | | Inlet Connection Size | 230 Millimeters | | Inlet Connection Type | 1/2" Male Thread | | Inlet connection size | 230 Millimeters | | Inlet connection type | 1/2" Male Thread | | Item Dimensions | 23 x 3 x 80 centimetres | | Item Type Name | Flamco Flexvent R1/2 inch Radiator Bleeder Automatic, Float Vent Heater, Quick Bleed, Thermostatic Valve, Flexvent Vent 27740 | | Item Weight | 100 Grams | | Item dimensions L x W x H | 23 x 3 x 80 centimetres | | Manufacturer | Flamco | | Material | Messing | | Maximum Pressure | 10 Bars | | Model Number | 27740 | | Number of Items | 1 | | Number of Packs | 1 | | Number of Pieces | 1 | | Number of Ports | 2 | | Outlet Connection Size | 0.5 Inches | | Outlet Connection Type | External thread | | Part Number | 27740 | | Set Name | Flamco Flexvent 1/2" Floatvent 27740 | | Size | R½" | | Specification Met | CE, ISO 9001, RoHS | | Thread Size | 1/2" | | Thread Type | 1/2 inch | | Unit Count | 1.0 count | | Valve Type | Float Valve | ## Product Details - **Brand:** Flamco - **Exterior finish:** Brass - **Inlet connection size:** 230 Millimeters - **Inlet connection type:** 1/2" Male Thread - **Item dimensions L x W x H:** 23 x 3 x 80 centimetres - **Material:** Messing - **Maximum operating pressure:** 10 Bars - **Number of ports:** 2 - **Outlet connection size:** 0.5 Inches - **Outlet connection type:** External thread ## Images ![Flamco Flexvent 1/2" Floatvent c/w shut-off valve - Automatic Air Vent 27740 - Image 1](https://m.media-amazon.com/images/I/61yr+SH6UIL.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: Hello - does this connect directly to 15mm copper pipe or does it need an adaptor?** A: Hi, it has a 1/2" BSP male thread, so you would need an adaptor to fit it onto 15mm copper. **Q: Can I screw this straight into the top of my towel rail replacing the manual bleed valve? Will I need ptfe tape?** A: This type of valve isn't really designed for what you are proposing, more to remove air from whole systems. You may wish to consider one of the smaller valves specifically designed for radiators. Try "Aladdin Micro Barlo 6mm Fully Automatic Self Bleeding Radiator Valve" or perhaps have a chat with your local plumbers' merchant. **Q: what is the Product Dimensions?** A: Flexvent Dimensions Ø [mm]: 30 H. [mm]: 75.5 Connection R 1⁄2" **Q: Does the valve need to be fitted vertically** A: As the CH water lifts a plunger against gravity, if the valve was other than upright, it may not operate to its full capacity ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nice *by M***H on 21 May 2026* Does the job, fitted to the top of a wall heated towel rad, that got all the air buildup. So yes ok ### ⭐⭐⭐⭐⭐ Good product. Easy to install *by M***. on 19 February 2026* These are good bleed valves. ### ⭐⭐⭐⭐ It's 1/2 inch and comes with a closure valve. *by M***F on 21 December 2019* Easy to install and seems to work. Give it 4 weeks and I'll come back and buy a few more if it successfully clears air buildup in my manifolds. ## Frequently Bought Together - Flamco Flexvent 1/2" Floatvent c/w shut-off valve - Automatic Air Vent 27740 - LOCTITE 55 Pipe Thread Sealant, Non Curing Thread Sealant for Plumbing Pipes and Fittings, Reliable Fast Action Pipe Sealant for Metal and Plastic, 50m --- ## 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.at/products/52389645-flamco-flexvent-1-2-floatvent-c-w-shut-off-valve](https://www.desertcart.at/products/52389645-flamco-flexvent-1-2-floatvent-c-w-shut-off-valve) --- *Product available on Desertcart Austria* *Store origin: AT* *Last updated: 2026-09-26*