---
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: "$324.18"
currency: USD
in_stock: true
reviews_count: 13
category: "Uniweld"
url: https://www.desertcart.ec/products/954958-uniweld-rhp400-nitrogen-regulator-with-0-400-psi-delivery-pressure
store_origin: EC
region: Ecuador
---

# 1/4-inch male flare 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:** $324.18
**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?** $324.18 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/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 without galling.
- • **User-Friendly Design:** Large brass Tee handle and easy-to-read 2-inch gauges with protective rubber boots for effortless monitoring.
- • **Versatile Compatibility:** Works seamlessly with nitrogen and CO2 (with optional adaptor), perfect for diverse professional needs.
- • **Cost-Effective Maintenance:** Save time and money by managing your own nitrogen fills with a regulator trusted by pros.
- • **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 via a durable brass piston diaphragm and stainless steel components. Featuring a CGA580 inlet and 1/4-inch male flare outlet, it offers easy pressure adjustments with large gauges protected by rubber boots. Compatible with nitrogen and CO2 (with adaptor), this regulator is engineered for professional-grade purging and pressure testing in HVAC and refrigeration systems, combining reliability and cost-efficiency for the savvy technician.

## 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: 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.
Review: Works as it should - 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.

## 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 |
|---------------|-------|
| ASIN | B008HQ6GXO |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #226,709 in Automotive ( See Top 100 in Automotive ) #112 in Welding Gas Regulators |
| Brand | Uniweld |
| Color | White |
| Customer Reviews | 4.5 4.5 out of 5 stars (815) |
| Date First Available | July 5, 2012 |
| Exterior Finish | not_applicable |
| Global Trade Identification Number | 00688456130009 |
| Included Components | Regulator |
| Inlet Connection Size | 0.25 Inches |
| Inlet Connection Type | Flare |
| Installation Method | gas-welding |
| Is Discontinued By Manufacturer | No |
| Item Package Quantity | 1 |
| Item Weight | 2.4 pounds |
| Item dimensions L x W x H | 6.5 x 4.13 x 5.25 inches |
| Item model number | RHP400 |
| Manufacturer | Uniweld |
| Material | Brass |
| Maximum Operating Pressure | 290 Bars |
| Measurement System | Imperial |
| Number of Ports | 1 |
| Outlet Connection Size | 0.25 Inches |
| Outlet Connection Type | Flare |
| Part Number | RHP400 |
| Pattern | not_applicable |
| Power Source | Hand Powered |
| Product Dimensions | 6.5 x 4.13 x 5.25 inches |
| Shape | circle |
| Size | CGA580 |
| Specification Met | not_applicable |
| Style | Modern |
| UPC | 756655652711 696335181738 610373673949 785533152562 688456130009 |
| Voltage | 110 Volts |
| Wattage | 200 watts |

## 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 Bars
- **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)
![Uniweld RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection - Image 2](https://m.media-amazon.com/images/I/81y77ZnYzaL.jpg)
![Uniweld RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection - Image 3](https://m.media-amazon.com/images/I/81czO+Rf0EL.jpg)
![Uniweld RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection - Image 4](https://m.media-amazon.com/images/I/71PE9nuo0xL.jpg)
![Uniweld RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection - Image 5](https://m.media-amazon.com/images/I/81CxUUsy8WL.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

### ⭐⭐⭐⭐⭐ 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.

### ⭐⭐⭐⭐⭐ Good quality at a very good price
*by B***R on September 8, 2016*

I used to spend $250 to 300 for a regulator. We have been using the first of these units for over a year and I just purchased two more based on its performance. They are solid units and have held up well. The thread quality on the fittings is good and shows minimal thread wear after 20-30 tank changes. The housing is very solid brass and has stood up to a drop or two. The gauges are decent with metal cases and a molded rubber bumper - we haven't tried to calibrate them but They are better than the typical low end plastic housings that I would expect for a regulator at this price point.

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*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-03-10*