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?

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.

How is the CGA-580 fitting threaded into this unit? I want to take that out and use NPT as much as I can.

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.

Will this work with argon

Yes it will work with argon. The regulator has a CGA 580 inlet connection and a 1/4" male flare outlet connection.

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?

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.

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Uniweld RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection

Uniweld RHP400 Nitrogen Regulator with 0-400 PSI Delivery Pressure, CGA580 Inlet Connection and 1/4-Inch Male Flare Outlet Connection

Product ID: 954958

Details

Brand
Uniweld
Exterior Finish
Inlet Connection Size
0.25 inches
Inlet Connection Type
Flare
Item dimensions L x W x H
6.5 x 4.13 x
Material
Brass

🔩CGA580 inlet & 1/4" flare outlet

⚙️0-400 PSI precise delivery

🛡️Durable brass piston diaphragm

€ 204.27

Duties & taxes included

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Sold byAmazon SlovakiaDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

🛠️ Master your pressure game with Uniweld’s precision regulator—because every detail counts.

SAFETY FIRST DESIGN - Features a self-reseating relief valve to maintain system integrity and prevent pressure mishaps during critical operations.
VERSATILE COMPATIBILITY - Seamlessly switch between Nitrogen and CO2 with the optional Uniweld F36 adaptor—expand your toolkit’s flexibility.
CLEAR PROTECTED GAUGES - Stay in control with easy-to-read 2-inch gauges shielded by protective rubber boots for reliable monitoring on the go.
ROBUST BRASS CONSTRUCTION - Engineered with a durable brass piston diaphragm and regulator bushing that prevents galling—built to last through every project.
PRECISION PRESSURE CONTROL - Fine-tune your system with a smooth brass Tee Handle and stainless steel adjusting screw for flawless 0-400 PSI delivery.

The Uniweld RHP400 Nitrogen Regulator delivers precise 0-400 PSI pressure control with durable brass construction, CGA580 inlet and 1/4-inch flare outlet connections, and easy-to-read protected gauges. Designed for professional-grade purging and pressure testing in HVAC and refrigeration systems, it offers smooth adjustment, safety features, and compatibility with CO2 via an optional adaptor.

Specifications

ASIN	B008HQ6GXO
Best Sellers Rank	#112,873 in Automotive ( See Top 100 in Automotive ) #56 in Welding Gas Regulators
Brand Name	Uniweld
Connector Type	not_applicable
Customer Reviews	4.6 4.6 out of 5 stars (818)
Exterior Finish	not_applicable
Global Trade Identification Number	00688456130009
Included Components	Regulator
Inlet Connection Size	0.25 inches
Inlet Connection Type	Flare
Item Dimensions	6.5 x 4.13 x 5.25 inches
Item Type Name	Special Purpose Nitrogen Regulators
Item Weight	2.4 pounds
Manufacturer	Uniweld
Manufacturer Part Number	RHP400
Material Type	Brass
Maximum Pressure	290 bar
Model Number	RHP400
Number of Items	1
Number of Packs	1
Number of Pieces	1
Number of Ports	1
Outlet Connection Size	0.25 inches
Outlet Connection Type	Flare
Size	CGA580
Specification Met	not_applicable
Thread Size	0.25 inches
Thread Type	Flare
UPC	756655652711 696335181738 610373673949 785533152562 688456130009
Valve Type	Globe Valve

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TrustScore 4.5 | 7,300+ reviews

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