--- product_id: 343584116 title: "AR4000-N04 Female Thread 1/2 NPT Air Pressure Regulator 0-150 PSI Adjustable,Bracket,Gauge" brand: "sns" price: "R1570" currency: ZAR in_stock: true reviews_count: 13 category: "Sns" url: https://www.desertcart.co.za/products/343584116-ar4000-n04-female-thread-1-2-npt-air-pressure-regulator store_origin: ZA region: South Africa --- # 1/2" NPT female thread 211.9 SCFM max flow 5~60℃ operating range AR4000-N04 Female Thread 1/2 NPT Air Pressure Regulator 0-150 PSI Adjustable,Bracket,Gauge **Brand:** sns **Price:** R1570 **Availability:** ✅ In Stock ## Summary > 🔧 Master your airflow like a pro — precision meets power! ## Quick Answers - **What is this?** AR4000-N04 Female Thread 1/2 NPT Air Pressure Regulator 0-150 PSI Adjustable,Bracket,Gauge by sns - **How much does it cost?** R1570 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/343584116-ar4000-n04-female-thread-1-2-npt-air-pressure-regulator) ## Best For - sns enthusiasts ## Why This Product - Trusted sns brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **High Flow Capacity:** Supports up to 211.9 SCFM (6000 L/min) for efficient air regulation in professional setups. - • **Temperature Resilience:** Operates reliably between 41°F and 140°F (5~60℃), perfect for diverse industrial conditions. - • **Versatile Installation:** Standard 1/2" NPT female threaded ports fit seamlessly into existing pneumatic systems. - • **Precision Pressure Control:** Easily adjust from 0 to 150 PSI with a smooth rotary knob for exact airflow management. - • **Robust Aluminum Alloy Build:** Durable, lightweight construction ensures long-lasting performance in demanding environments. ## Overview The SNS AR4000-N04 is a high-performance air pressure regulator featuring a 1/2" NPT female thread, adjustable pressure up to 150 PSI, and a robust aluminum alloy body. Designed for professional pneumatic systems, it delivers a maximum flow rate of 211.9 SCFM and operates efficiently within a 5~60℃ temperature range, ensuring reliable and precise airflow control. ## Description SNS AR4000-N04 Female Thread 1/2 NPT Air Pressure Regulator 0-150 PSI Adjustable,Bracket,Gauge: desertcart.com: Industrial & Scientific Review: Gets the job done - Fixed my compressor's leak problem. Well not 100%, but the remaining leak is very slow and is likely happening elsewhere. I'm good now, because my compressor might self-cycle once every hour as opposed to once every 5-10 minutes. For my occasional use, that's totally acceptable. I did have to dismantle more than I was expecting, because my pancake tank didn't have enough clearance to directly attach this. I had to remove the main assembly and gauge to be able to screw this in. Others commented about a lack of instructions. Mine has an arrow on the back that showed the direction of airflow, and it does not seem to leak air. Review: Appears to be of good quality - So far so good. Great airflow. Using it on a 175psi compressor. No leaks. ## Features - Thread: 1/2 NPT - Rated Flow: 211.9 SCFM (6000 L/min) - Temperature Range: 5~60℃(41-140℉) - Aluminum Alloy Material - When regulating pressure, pull up the rotary knob and rotate clockwise to increase the pressure and rotate anticlockwise to decrease the pressure ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B08B3S1WDX | | Best Sellers Rank | #3,180 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #1 in Compressed Air Regulators | | Brand Name | SNS | | Customer Reviews | 4.4 4.4 out of 5 stars (1,088) | | Inlet Connection Size | 0.5 Inches | | Inlet Connection Type | National Pipe Tapered | | Manufacturer | China SNS Pneumatic Co.,Ltd | | Material Type | Aluminum | | Maximum Pressure | 150 Pound per Square Inch | | Model Number | AR4000-N04 | | Number of Ports | 2 | | Outlet Connection Size | 0.5 Inches | | Outlet Connection Type | FNPT | | Size | 4000-N04 | | Thread Size | 1/2 inches | | Thread Type | NPT | | Unit Count | 1.0 Count | | Valve Type | Needle Valve | ## Product Details - **Brand:** SNS - **Inlet Connection Size:** 0.5 Inches - **Inlet Connection Type:** National Pipe Tapered - **Manufacturer:** China SNS Pneumatic Co.,Ltd - **Material:** Aluminum - **Maximum Operating Pressure:** 150 Pound per Square Inch - **Number of Ports:** 2 - **Outlet Connection Size:** 0.5 Inches - **Outlet Connection Type:** FNPT ## Images ![AR4000-N04 Female Thread 1/2 NPT Air Pressure Regulator 0-150 PSI Adjustable,Bracket,Gauge - Image 1](https://m.media-amazon.com/images/I/71TlqvYxS5L.jpg) ## Available Options This product comes in different **Color, Size** options. ## Questions & Answers **Q: can this be used for co2?** A: Yes **Q: Wich side is in on the air?** A: The air source is on the left as you face the meter. The flow is left to right. If you look closely at the video, you'll see an arrow on the bottom at the inlet side. **Q: Is this a diaphragm type?** A: Not that I know of! **Q: Can the air pressure be set before air flows?** A: Yes, it can be set before air flows to the output. But the inlet needs to be pressurized to see where it's set as the only indication of the setting is what is read from the gauge. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Gets the job done *by O***O on March 1, 2026* Fixed my compressor's leak problem. Well not 100%, but the remaining leak is very slow and is likely happening elsewhere. I'm good now, because my compressor might self-cycle once every hour as opposed to once every 5-10 minutes. For my occasional use, that's totally acceptable. I did have to dismantle more than I was expecting, because my pancake tank didn't have enough clearance to directly attach this. I had to remove the main assembly and gauge to be able to screw this in. Others commented about a lack of instructions. Mine has an arrow on the back that showed the direction of airflow, and it does not seem to leak air. ### ⭐⭐⭐⭐⭐ Appears to be of good quality *by T***7 on February 22, 2026* So far so good. Great airflow. Using it on a 175psi compressor. No leaks. ### ⭐⭐⭐⭐⭐ Works great *by J***E on February 18, 2026* Replaced a poor regulator setup on my Husky 26gallon "quiet" compressor. There's an arrow on the bottom of the regulator to indicate flow direction (inferring in/out ports). The 2nd gauge plug was not sealed very well so I'd check yours/add sealant before putting into operation. Note the gauge shown is not the one included. My only complaint, is that the turndown ratio is really low, meaning you have to turn this regulator MANY times to go from 0 to your target pressure (or pressure down to zero). As someone who always turns the regulator down at the end of the day this is annoying. Great for precision adjustment but not so great for course adjustment. ## Frequently Bought Together - SNS AR4000-N04 Female Thread 1/2 NPT Air Pressure Regulator 0-150 PSI Adjustable,Bracket,Gauge - TL TOOLEGIN 1/2" NPT Male x 1/4" NPT Female Brass Bushing Reducer Reducing Pipe Adapter Fitting 5pcs 1200 PSI - SENCTRL 0-160 Psi Glycerin Liquid Filled Air Pressure Gauge, 2.5" Dial Size, 1/4" NPT Lower Mount, Stainless Steel Case, Water Pump, Tire, Large Air Compressor, Well Pump, RV Regulator Pressure Test --- ## 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.co.za/products/343584116-ar4000-n04-female-thread-1-2-npt-air-pressure-regulator](https://www.desertcart.co.za/products/343584116-ar4000-n04-female-thread-1-2-npt-air-pressure-regulator) --- *Product available on Desertcart South Africa* *Store origin: ZA* *Last updated: 2026-04-24*