---
product_id: 253769555
title: "RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection"
brand: "uniweld"
price: "R5065"
currency: ZAR
in_stock: true
reviews_count: 5
category: "Uniweld"
url: https://www.desertcart.co.za/products/253769555-rhp400-nitrogen-regulator-with-0-400-psi-delivery-pressure-cga580
store_origin: ZA
region: South Africa
---

# Easy-read 2-inch gauges with rubber boots Durable brass piston diaphragm 0-400 PSI precise delivery pressure RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection

**Brand:** uniweld
**Price:** R5065
**Availability:** ✅ In Stock

## Summary

> ⚡ Elevate your gas control game with precision and durability!

## Quick Answers

- **What is this?** 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?** R5065 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/253769555-rhp400-nitrogen-regulator-with-0-400-psi-delivery-pressure-cga580)

## 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

- • **Ergonomic Design:** Large brass Tee handle offers effortless pressure tuning, preventing galling for long-term smooth operation.
- • **User-Friendly Gauges:** Large 2-inch easy-to-read gauges protected by rubber boots for on-the-job clarity and safety.
- • **Versatile Compatibility:** Works with nitrogen and CO2 (with optional adaptor), perfect for HVAC and refrigeration pros.
- • **Rugged Brass Construction:** Heavy-duty brass piston and diaphragm ensure durability for demanding professional use.
- • **Precision Pressure Control:** Smooth, accurate 0-400 PSI adjustment with stainless steel screw for lasting reliability.

## Overview

The Uniweld RHP400 Nitrogen Regulator delivers precise pressure control up to 400 PSI with a durable brass piston diaphragm and easy-to-read 2-inch gauges protected by rubber boots. Designed for professional HVAC and refrigeration applications, it features a large brass Tee handle with stainless steel adjustment screw to prevent galling, ensuring smooth and reliable operation. Compatible with nitrogen and CO2 (with adaptor), this regulator combines rugged construction with user-friendly design for dependable performance on every job.

## 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).

Review: Recibi a tiempo el paquete conteniendo el regulador de nitrogeno uniweld, edtoy agradecido, respecto al producto muy buena calidad, fuerte para el trabajo. Precio excelente. Muchas gracias.
Review: 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 |
|---------------|-------|
| ASIN | B008HQ6GXO |
| ASIN  | B008HQ6GXO |
| Batteries Included? | No |
| Batteries Required? | No |
| Best Sellers Rank | #110,890 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #15 in Welding Gas Regulators |
| Color | Multicolored |
| Customer Reviews | 4.5 4.5 out of 5 stars (784) |
| Customer reviews | 4.5 4.5 out of 5 stars (784) |
| Date First Available | 1 January 2024 |
| Date First Available  | 1 January 2024 |
| Included components | Regulator |
| Installation Method | gas-welding |
| Is Discontinued By Manufacturer  | No |
| Item Package Quantity | 1 |
| Item Weight | 1.09 Kilograms |
| Item model number | RHP400 |
| Item model number  | RHP400 |
| Manufacturer | Uniweld |
| Manufacturer  | Uniweld |
| Material | Brass |
| Maximum Pressure | 400 Pound per Square Inch |
| Measurement System | Imperial |
| Part number | RHP400 |
| Power source type | Hand Powered |
| Product Dimensions | 16.51 x 10.49 x 13.34 cm; 1.09 kg |
| Product Dimensions  | 16.51 x 10.49 x 13.34 cm; 1.09 kg |
| Size | CGA580 |
| Specification met | CGA, ULC, CSA |
| Voltage | 110 Volts |
| Wattage | 200 watts |

## Product Details

- **Brand:** Uniweld
- **Exterior finish:** Brass, Stainless Steel
- **Inlet connection size:** 0.25 Inches
- **Item dimensions L x W x H:** 16.5 x 10.5 x 13.3 centimeters
- **Material:** Brass

## Images

![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

### ⭐⭐⭐⭐⭐ Review
*by T***Z on 8 May 2021*

Recibi a tiempo el paquete conteniendo el regulador de nitrogeno uniweld, edtoy agradecido, respecto al producto muy buena calidad, fuerte para el trabajo. Precio excelente. Muchas gracias.

### ⭐⭐⭐⭐⭐ Review
*by D***8 on 6 March 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.

### ⭐⭐⭐⭐⭐ Review
*by B***E on 12 October 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.co.za/products/253769555-rhp400-nitrogen-regulator-with-0-400-psi-delivery-pressure-cga580](https://www.desertcart.co.za/products/253769555-rhp400-nitrogen-regulator-with-0-400-psi-delivery-pressure-cga580)

---

*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-03-08*