--- product_id: 42209995 title: "Caleffi 502015A High Capacity Automatic Air Vent 1/8-Inch NPT Male" brand: "caleffi" price: "496 kr" currency: NOK in_stock: true reviews_count: 13 category: "Caleffi" url: https://www.desertcart.no/products/42209995-caleffi-502015a-high-capacity-automatic-air-vent-1-8-inch store_origin: NO region: Norway --- # High capacity automatic air vent Threaded 1/8-Inch NPT connection Premium Italian engineering Caleffi 502015A High Capacity Automatic Air Vent 1/8-Inch NPT Male **Brand:** caleffi **Price:** 496 kr **Availability:** ✅ In Stock ## Summary > 💨 Elevate your system’s flow with Italian precision – don’t let air hold you back! ## Quick Answers - **What is this?** Caleffi 502015A High Capacity Automatic Air Vent 1/8-Inch NPT Male by caleffi - **How much does it cost?** 496 kr with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.no](https://www.desertcart.no/products/42209995-caleffi-502015a-high-capacity-automatic-air-vent-1-8-inch) ## 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 - • **Optimize Longevity:** Reduces corrosion and wear by maintaining air-free systems for longer equipment life. - • **Compact Precision Fit:** Threaded 1/8-inch NPT male connection ensures easy, leak-proof installation. - • **Durability Meets Design:** Crafted by Caleffi, Italy’s leader in high-performance hydronic components. - • **Trusted by Professionals:** Rated 4.5 stars with proven reliability in demanding HVAC environments. - • **Seamless System Efficiency:** Automatically expels trapped air to boost heating and plumbing performance. ## Overview The Caleffi 502015A is a high-capacity automatic air vent featuring a 1/8-inch NPT threaded connection, designed to efficiently remove trapped air from heating and plumbing systems. Manufactured by Italy’s top hydronic component expert, it enhances system performance, reduces corrosion, and extends equipment lifespan, making it a trusted choice for professionals seeking reliable HVAC solutions. ## 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: It does let air in to break a vacuum and allow draining, as desired. - I needed this for the dual purpose of breaking a vacuum and allowing air in when draining. I asked a question about this and got conflicting answers. I bought it and tested. When the water pressure is supplied, air is only let out, obviously. When the water pressure is shut off and a drain point opened elsewhere in the system, this valve indeed opens and lets air in to break the vacuum, as I hoped. There is a thin metal tab inside the 1/8-inch male thread just like competing products. I believe this tab is called a vacuum breaker and gets pulled down when draining. The tab was bent (see photo) as the packaging doesn't protect it, but as others advised I bent it back straight using needle nose pliers so it can move up and down. The description of the air release under the black plastic cap being like a Schrader valve which can be manually pressed in made it sound to me like it was a one-way valve where air could be let out but not enter. In fact, see photo, there are small openings around the pin so air can enter when draining as I hoped. I guess you would only press the pin if some reason the valve was stuck. Very happy with this valve and the SCFM of 1.75 is noticeably high capacity. My draining application is much faster now. There is a little jolt and water spurt released when first pressurizing the system from empty if the cap is all the way open. People say you can reduce that by tightening down the cap a little more to get a slower smoother closing action. In my case i don't mind any occasional spurts of water in the location and application I have, so i leave the cap almost fully unscrewed to benefit from the high capacity air entry when draining. I don't fully remove the cap so as to protect from dust and debris. Review: Use in beginning and shouldn’t hopefully need it afterwords. Tweaks the startup few days very well. - Wasn’t sure how this needed to be used, sporadically?constantly? When is it not needed? Should I always keep it plumbed in? I decided to leave it open a little for the first 2 days with my new radiant floor system, despite info that I was told on not needing it, that it was a waste of money. Checked out system after having it on top of an air capture fitting, 2 days, and boom, system was on point, no more air pockets. The valve gauges were at max performance. Yesss. I turn it back on for a few seconds about 1 time a week now, unnecessarily, and things are smooth. Thnx. ## Features - Enhance system performance and life expectancy - Connection Type: Threaded - Connection Size: 0.13-Inch ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B008V64R0Y | | Batteries Included? | No | | Batteries Required? | No | | Best Sellers Rank | #413,692 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #2,160 in Registers, Grilles & Vents | | Customer Reviews | 4.5 4.5 out of 5 stars (100) | | Date First Available | August 15, 2012 | | Is Discontinued By Manufacturer | No | | Item Package Quantity | 1 | | Item Weight | 6.4 ounces | | Item model number | 502015A | | Manufacturer | Caleffi | | Part Number | 502015A | | Product Dimensions | 1.88 x 2 x 3.13 inches | ## Images ![Caleffi 502015A High Capacity Automatic Air Vent 1/8-Inch NPT Male - Image 1](https://m.media-amazon.com/images/I/51q3KDNwl4L.jpg) ## Customer Reviews ### ⭐⭐⭐⭐⭐ It does let air in to break a vacuum and allow draining, as desired. *by M***T on October 5, 2023* I needed this for the dual purpose of breaking a vacuum and allowing air in when draining. I asked a question about this and got conflicting answers. I bought it and tested. When the water pressure is supplied, air is only let out, obviously. When the water pressure is shut off and a drain point opened elsewhere in the system, this valve indeed opens and lets air in to break the vacuum, as I hoped. There is a thin metal tab inside the 1/8-inch male thread just like competing products. I believe this tab is called a vacuum breaker and gets pulled down when draining. The tab was bent (see photo) as the packaging doesn't protect it, but as others advised I bent it back straight using needle nose pliers so it can move up and down. The description of the air release under the black plastic cap being like a Schrader valve which can be manually pressed in made it sound to me like it was a one-way valve where air could be let out but not enter. In fact, see photo, there are small openings around the pin so air can enter when draining as I hoped. I guess you would only press the pin if some reason the valve was stuck. Very happy with this valve and the SCFM of 1.75 is noticeably high capacity. My draining application is much faster now. There is a little jolt and water spurt released when first pressurizing the system from empty if the cap is all the way open. People say you can reduce that by tightening down the cap a little more to get a slower smoother closing action. In my case i don't mind any occasional spurts of water in the location and application I have, so i leave the cap almost fully unscrewed to benefit from the high capacity air entry when draining. I don't fully remove the cap so as to protect from dust and debris. ### ⭐⭐⭐⭐⭐ Use in beginning and shouldn’t hopefully need it afterwords. Tweaks the startup few days very well. *by J***S on January 27, 2026* Wasn’t sure how this needed to be used, sporadically?constantly? When is it not needed? Should I always keep it plumbed in? I decided to leave it open a little for the first 2 days with my new radiant floor system, despite info that I was told on not needing it, that it was a waste of money. Checked out system after having it on top of an air capture fitting, 2 days, and boom, system was on point, no more air pockets. The valve gauges were at max performance. Yesss. I turn it back on for a few seconds about 1 time a week now, unnecessarily, and things are smooth. Thnx. ### ⭐⭐⭐⭐ Supper small *by P***N on February 21, 2024* Supper small. ## Frequently Bought Together - Caleffi 502015A High Capacity Automatic Air Vent 1/8-Inch NPT Male - AMTROL 102-1#30 EX-30 30 Extrol Expansion Tank - Watts 0342691 30 PSI Pressure Relief Valve, Bronze, 3/4" 335 M2-030 --- ## 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.no/products/42209995-caleffi-502015a-high-capacity-automatic-air-vent-1-8-inch](https://www.desertcart.no/products/42209995-caleffi-502015a-high-capacity-automatic-air-vent-1-8-inch) --- *Product available on Desertcart Norway* *Store origin: NO* *Last updated: 2026-10-06*