--- product_id: 954958 title: "Uniweld RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection" brand: "uniweld" price: "S$195" currency: SGD in_stock: true reviews_count: 13 category: "Uniweld" url: https://www.desertcart.sg/products/954958-uniweld-rhp400-nitrogen-regulator-with-0-400-psi-delivery-pressure store_origin: SG region: Singapore --- # 1/4-inch flare inlet/outlet Durable brass piston diaphragm 0-400 PSI precise delivery Uniweld RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection **Brand:** uniweld **Price:** S$195 **Availability:** ✅ In Stock ## Summary > ⚡ Elevate your pressure game with precision and durability! ## Quick Answers - **What is this?** Uniweld RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection by uniweld - **How much does it cost?** S$195 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.sg](https://www.desertcart.sg/products/954958-uniweld-rhp400-nitrogen-regulator-with-0-400-psi-delivery-pressure) ## Best For - uniweld enthusiasts ## Why This Product - Trusted uniweld brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Built to Last:** Robust brass piston diaphragm and stainless steel adjusting screw ensure long-term reliability. - • **User-Friendly Design:** Large brass Tee handle and easy-to-read 2-inch gauges with protective rubber boots for effortless operation. - • **Maintenance Made Simple:** Self-reseating relief valve enhances safety and reduces downtime during pressure adjustments. - • **Versatile Compatibility:** Works seamlessly with nitrogen and CO2 (with optional adaptor) for multi-application flexibility. - • **Precision Pressure Control:** Smooth, accurate 0-400 PSI delivery for flawless system purging and testing. ## Overview The Uniweld RHP400 Nitrogen Regulator delivers precise 0-400 PSI pressure control with a durable brass piston diaphragm and easy-to-read gauges. Featuring a CGA580 inlet and 1/4-inch flare outlet, it offers smooth adjustments via a large brass Tee handle and stainless steel screw. Compatible with nitrogen and CO2 (with adaptor), this regulator is engineered for reliable, versatile performance in HVAC and refrigeration pressure testing. ## Description Product Description Uniweld RHP400 is a durable brass piston designed diaphragm Nitrogen Regulator with a Delivery Pressure 0-400 PSI for purging and pressure testing air conditioning and refrigeration systems. Regulator with CGA580 inlet connection, 1/4 inch male flare outlet connection, self re-seating relief valve (not designed to protect downstream system) and easy to read 2 inch Contents Gauge 0-4000 PSI (Part No. G7SD) and Delivery Gauge 0-600 PSI (Part No. G8SD) with protective rubber gauge boots (Part No. GB20S). For smooth accurate delivery pressure adjustment there is a large brass Tee Handle with stainless steel pressure adjusting screw and regulator bushing that prevents galling. Regulator can be used with CO2 with the Uniweld part no. F36 adaptor, CO2 Cylinder (CGA320) to Nitrogen Regulator (CGA580) (purchased separately). From the Manufacturer Uniweld RHP400 is a durable brass piston designed diaphragm Nitrogen Regulator with a Delivery Pressure 0-400 PSI for purging and pressure testing air conditioning and refrigeration systems. Regulator with CGA580 inlet connection, 1/4 inch male flare outlet connection, self re-seating relief valve (not designed to protect downstream system) and easy to read 2 inch Contents Gauge 0-4000 PSI (Part No. G7SD) and Delivery Gauge 0-600 PSI (Part No. G8SD) with protective rubber gauge boots (Part No. GB20S). For smooth accurate delivery pressure adjustment there is a large brass Tee Handle with stainless steel pressure adjusting screw and regulator bushing that prevents galling. Regulator can be used with CO2 with the Uniweld part no. F36 adaptor, CO2 Cylinder (CGA320) to Nitrogen Regulator (CGA580) (purchased separately). Review: Nitrogen Regulator - Good quality and has been preforming well. Review: Pretty decent regulator for the money and better than I ... - Pretty decent regulator for the money and better than I expected. Adjustment to pressure is easy, smooth and does exactly what it's supposed to do. Couldn't ask for any more on that end of things. The gauges are a tiny bit iffy. If what you are doing does not require a lot of accuracy then they work great. The application I am using this for needs to be very close so I switched the delivery pressure gauge out with one that was much more sensitive and could not be happier. Overall I am very happy with this purchase. It works great and I am really happy with the quality considering what I paid. ## Features - Nitrogen Regulator, Delivery Pressure 0-400 PSI - CGA580 Inlet Connection, 1/4 Inch Male Flare Outlet Connection and Easy to Read 2 Inch Gauges with Protective Rubber Gauge Boots - Durable brass piston designed diaphragm, self re-seating relief valve (not designed to protect downstream system) - Large brass Tee Handle with stainless steel pressure adjusting screw and regulator bushing that prevents galling - Regulator can be used with CO2 with the Uniweld part no F36 adaptor, CO2 Cylinder (CGA320) to Nitrogen Regulator (CGA580) (purchased separately) ## Technical Specifications | Specification | Value | |---------------|-------| | Brand | Uniweld | | Exterior Finish | not_applicable | | Inlet Connection Size | 0.25 inches | | Inlet Connection Type | Flare | | Item Dimensions | 6.5 x 4.13 x 5.25 inches | | Item dimensions L x W x H | 6.5 x 4.13 x 5.25 inches | | Material | Brass | | Material Type | Brass | | Outlet Connection Size | 0.25 inches | | Outlet Connection Type | Flare | | Specification Met | not_applicable | ## Product Details - **Brand:** Uniweld - **Exterior Finish:** not_applicable - **Inlet Connection Size:** 0.25 inches - **Inlet Connection Type:** Flare - **Item dimensions L x W x H:** 6.5 x 4.13 x 5.25 inches - **Material:** Brass - **Maximum Operating Pressure:** 290 bar - **Number of Ports:** 1 - **Outlet Connection Size:** 0.25 inches - **Outlet Connection Type:** Flare ## Images ![Uniweld RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection - Image 1](https://m.media-amazon.com/images/I/71xGQ7q6WoL.jpg) ## Questions & Answers **Q: The advertized Delivery Pressure of this regulator is 400psi, but the delivery gauge shown in the photo shows a max pressure of 600 psi. Which is it?** A: When the first stage of the regulator is supplied with > 600 PSI, the output is limited to roughly 480 PSI in the fully open position. Also, the guy that said you wouldn't need to go that high for normal use is an idiot. Nobody knows what you will be using this regulator for. **Q: How is the CGA-580 fitting threaded into this unit? I want to take that out and use NPT as much as I can.** A: Purchase a LASCO 17-6783 1/4-Inch Female Flare by 1/4-Inch Male Pipe Thread Brass Adapter. Don't attempt to remove the existing NPT-to-flare fitting because it is sealed into the regulator assembly and you risk damaging the regulator. **Q: Will this work with argon** A: Yes it will work with argon. The regulator has a CGA 580 inlet connection and a 1/4" male flare outlet connection. **Q: I purchased this regulator and the yellow hose does not attach to the 1/4" flare, it is to small. The yellow hose fitting is to big?** A: You are not using standard refrigeration hoses. Sounds like your either using the mini- split adapter or larger vacuum type hoses. Take it by an HVAC supplier and they will show you the proper size. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Nitrogen Regulator *by K***R on July 13, 2026* Good quality and has been preforming well. ### ⭐⭐⭐⭐⭐ Pretty decent regulator for the money and better than I ... *by D***8 on March 6, 2016* Pretty decent regulator for the money and better than I expected. Adjustment to pressure is easy, smooth and does exactly what it's supposed to do. Couldn't ask for any more on that end of things. The gauges are a tiny bit iffy. If what you are doing does not require a lot of accuracy then they work great. The application I am using this for needs to be very close so I switched the delivery pressure gauge out with one that was much more sensitive and could not be happier. Overall I am very happy with this purchase. It works great and I am really happy with the quality considering what I paid. ### ⭐⭐⭐⭐⭐ Works as it should *by B***E on October 12, 2017* I bought this to put on a Nitrogen bottle I bought to charge shock absorber remote reservoirs. The gauges and regulator work perfectly. I did swap out the regulated gauge for a different one with a lower capacity but higher resolution. This works better for my needs but there was nothing wrong with the original one for most applications. The nitrogen needed to fill a shock is very inexpensive, is estimate less than $1. Shops want around $20 to do it. Obviously if you have one shock to do one time, having a ship do it makes sense. If you have several shocks you plan to do regular maintenance on getting everything you need to fill them yourself. It is far more convienent and will save you money in the long run. ## Frequently Bought Together - Uniweld RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection - Appion MGAVCT 1/4" MegaFlow Vacuum-Rated Valve Core Removal Tool - Uniweld NV1 Nitro Vue Flow Indicator with 1/4" Flare Fittings Single-Gas Flowmeter, Regular, Silver --- ## 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.sg/products/954958-uniweld-rhp400-nitrogen-regulator-with-0-400-psi-delivery-pressure](https://www.desertcart.sg/products/954958-uniweld-rhp400-nitrogen-regulator-with-0-400-psi-delivery-pressure) --- *Product available on Desertcart Singapore* *Store origin: SG* *Last updated: 2026-09-06*