--- product_id: 34274122 title: "Caleffi 502710A Automatic Air Vent 1/8\" NPT Male with Check Valve" brand: "caleffi" price: "€ 37.80" currency: EUR in_stock: true reviews_count: 13 category: "Caleffi" url: https://www.desertcart.sk/products/34274122-caleffi-502710a-automatic-air-vent-1-8-npt-male-check store_origin: SK region: Slovakia --- # Automatic trapped air removal Built-in check valve for system protection 1/8" NPT threaded connection Caleffi 502710A Automatic Air Vent 1/8" NPT Male with Check Valve **Brand:** caleffi **Price:** € 37.80 **Availability:** βœ… In Stock ## Summary > πŸ’¨ Keep your system effortlessly flawless with Caleffi’s automatic air vent! ## Quick Answers - **What is this?** Caleffi 502710A Automatic Air Vent 1/8" NPT Male with Check Valve by caleffi - **How much does it cost?** € 37.80 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/34274122-caleffi-502710a-automatic-air-vent-1-8-npt-male-check) ## Best For - caleffi enthusiasts ## Why This Product - Trusted caleffi brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - β€’ **Compact & Lightweight:** Slim 0.5 x 0.5 x 2.5 inch design fits discreetly in any setup. - β€’ **Integrated Check Valve:** Prevents backflow, safeguarding your system from pressure issues. - β€’ **Precision Threaded Fit:** 1/8" NPT male connection ensures secure, leak-free installation. - β€’ **Seamless System Efficiency:** Automatically expels trapped air to boost HVAC performance and longevity. - β€’ **Trusted Italian Engineering:** From Caleffi, a leader in high-performance heating and plumbing components. ## Overview The Caleffi 502710A Automatic Air Vent features a 1/8" NPT male threaded connection and a built-in check valve to automatically remove trapped air from heating and air conditioning systems, enhancing system efficiency and durability. Compact and lightweight, this gold-finished vent is engineered by Italy’s leading manufacturer of HVAC components. ## Description Product Description Caleffi is the leading Italian manufacturer of high-quality components for heating, conditioning and plumbing systems and supplier of high performance hydroid solutions. From the Manufacturer Caleffi is the leading Italian manufacturer of high-quality components for heating, conditioning and plumbing systems and supplier of high performance hydroid solutions. Review: Same model that the pros used, easy to install, complete with separate check valve - My heating contractor wanted $79 to replace one of these automatic air vents, so I decided I would just order this and replace it myself. It is the exact same model number that was on my system, except this one came with a separate check valve in addition to the standard vent. Replacing it was easy - just shut off the water supply and use the existing ball valves to isolate the boiler, open the boiler drain until the pressure gauge drops to zero. Unscrew the old air vent, put Teflon tape on the new one, and screw it on. Reverse the process and you're all done in 10 minutes. Be sure to keep the plastic vent screw on top loose to allow the air to escape. The separate check valve is nice, because next time I have to replace it I won't have to drain the system. Note that this air vent has a slightly narrower profile than the standard Taco air vent, which made all the difference in the world for me because there was a riser pipe close enough to the air vent that would not allow the Taco to fit. The 1/8" narrower profile of the Caleffi worked out perfectly. Review: Good vent but check valve needs improvement - I like the air vent, however check valves, fails in less than a month, for me. Second one already and causes a big mess. Great idea, but unfortunately, check valve clogs too easily. ## Features - Enhance system performance and life expectancy - Connection Type: Threaded - Designed to remove trapped air that accumulates in heating and air conditioning systems automatically - Connection Size: 0.13-Inch ## Technical Specifications | Specification | Value | |---------------|-------| | Manufacturer | Caleffi | | Part Number | 502710A | | Item Weight | 0.01 ounces | | Product Dimensions | 0.5 x 0.5 x 2.5 inches | | Item model number | 502710A | | Color | Gold | | Item Package Quantity | 1 | | Number Of Pieces | 1 | | Measurement System | Inch | | Included Components | AUTO AIR VENT 1/8 NPT MALE | | Batteries Required? | No | ## Images ![Caleffi 502710A Automatic Air Vent 1/8" NPT Male with Check Valve - Image 1](https://m.media-amazon.com/images/I/61nAr1-Pb9L.jpg) ## Questions & Answers **Q: what is the total lengh** A: Approximately 3" from top to bottom. Hope this helps. **Q: Does this have to be installed vertically?** A: I believe si as this is a "float valvr" type device **Q: How will it connect to a 15mn pipe? Does it come with a connector or a compression joint** A: This is 1/8" male pipe thread. I'm not sure how you would tie this into metric pipe. **Q: Exactly, how does this item work?** A: Go here for the technical details: http://www.caleffi.com/usa/en-us/catalogue/automatic-air-vent-service-check-valve-502710a ## Customer Reviews ### ⭐⭐⭐⭐⭐ Same model that the pros used, easy to install, complete with separate check valve *by B***H on January 15, 2017* My heating contractor wanted $79 to replace one of these automatic air vents, so I decided I would just order this and replace it myself. It is the exact same model number that was on my system, except this one came with a separate check valve in addition to the standard vent. Replacing it was easy - just shut off the water supply and use the existing ball valves to isolate the boiler, open the boiler drain until the pressure gauge drops to zero. Unscrew the old air vent, put Teflon tape on the new one, and screw it on. Reverse the process and you're all done in 10 minutes. Be sure to keep the plastic vent screw on top loose to allow the air to escape. The separate check valve is nice, because next time I have to replace it I won't have to drain the system. Note that this air vent has a slightly narrower profile than the standard Taco air vent, which made all the difference in the world for me because there was a riser pipe close enough to the air vent that would not allow the Taco to fit. The 1/8" narrower profile of the Caleffi worked out perfectly. ### ⭐⭐⭐ Good vent but check valve needs improvement *by A***L on December 28, 2025* I like the air vent, however check valves, fails in less than a month, for me. Second one already and causes a big mess. Great idea, but unfortunately, check valve clogs too easily. ### ⭐⭐⭐⭐⭐ It works great *by L***O on February 24, 2026* Money well spent ## Frequently Bought Together - Caleffi 502710A Automatic Air Vent 1/8" NPT Male with Check Valve - Joywayus Brass Automatic Float Valve Kit 1/2"G Air Bleeder Release Vent Valve & 1/2"G Female Γ— 1/2"NPT Male Pipe Fitting Connector Adapter --- ## Why Shop on Desertcart? - πŸ›’ **Trusted by 1.3+ Million Shoppers** β€” Serving international shoppers since 2016 - 🌍 **Shop Globally** β€” Access 737+ million products across 21 categories - πŸ’° **No Hidden Fees** β€” All customs, duties, and taxes included in the price - πŸ”„ **15-Day Free Returns** β€” Hassle-free returns (30 days for PRO members) - πŸ”’ **Secure Payments** β€” Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** β€” Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.sk/products/34274122-caleffi-502710a-automatic-air-vent-1-8-npt-male-check](https://www.desertcart.sk/products/34274122-caleffi-502710a-automatic-air-vent-1-8-npt-male-check) --- *Product available on Desertcart Slovakia* *Store origin: SK* *Last updated: 2026-05-21*