Genesis : Picture 1 regular

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Regular: $382.50

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Genesis : Picture 1 regular

About Genesis "GS2000" Regulator GR450

Notice: Incorrect Gas warning in Product manual - Click for details

Innovation at its best is the way to explain the function of the Genesis GS2000 Regulator. The first stage regulator incorporates Genesis Dry Air Demand (DAD). This simple yet unique design has a flow-by piston that mechanically balance the air of the first stage ensuring excellent breathing characteristics at full or low cylinder pressures. Balanced flow-by piston design, which is a "fail safe" mechanism, with a patented dry seal internal mechanism to keep the intricate components clean and contaminate free no matter what kind of environment you dive it in, constructed from marine grade chrome plated brass for long life and durability.

The DAD's function allows the regulator is increase the intermediate pressure of the regulator without messy oils or grease as with more sophisticated designs. This added benefit makes the regulator virtually uncontaminated from the environment of salt, sand or chlorine internally, which makes it the choice of most repair technicians. The first stage is equipped with two 7/16" threaded high pressure (HP) ports and four 3/8" threaded low pressure (LP) ports for addition of gauges and LP accessories; this is one work horse first stage regulator. Tee - shaped design reduces regulator pr ofile when mounted on tank minimizing opportunity to make contact with the back of the head. First stage has a high capacity inlet filter for smooth delivery of air to the second stage.

The Genesis GS2000 Balance 2'nd Stage delivers air effortlessly; its pre-dive/dive switch eliminates sensitivity when swimming through surf, jumping off the side of the boat, or fining in a current, yet allows high performance breathing when needed. Durability is assured with a non-corrosive ABS/Polycarbonate housing and a corrosion resistant passivated (302) stainless steel demand valve lever. Breathing resistance is factory set for optimal resistance. The GS2000 2'nd stage regulator adjustment knob is unique in that once the diver finishes tuning the regulator at the surface, the second stage automatically compensates for changes in ambient pressure providing smooth and easy breathing from start to finish of your dive. The regulators orthodontic mouthpiece allows hours of comfortable breathing without jaw fatigue. Regulator comes with an owner's manual and a 31" (78.75 cm) 3/8" threaded low pressure hose. Regulator is Nitrox compatible up to 40% oxygen out-of-the-box".

The Genesis "GS2000" Regulator GR450 is commonly used for Cold Water, Extreme Depths, Recreation, Warm Water and more. The Genesis "GS2000" Regulator GR450 is most used by customers who consider themselves to be a Advanced, Advanced Diver, Beginner, Casual/ Recreational, Recreational Diver among others. The Genesis "GS2000" Regulator GR450 is popular because customers like the following qualities of the Genesis "GS2000" Regulator GR450: Adjustable, Comfortable, Effortless breathing, Nitrox Compatible.

Warranty Information

This product has a limited warranty of 24 months.

Genesis "GS2000" Regulator GR450 Features

  • Genesis "GS2000" Regulator GR450:
  • Nitrox Compatible Up to 40% Oxygen Out-of-the-Box
  • 3/8" Threaded 31" (78.75cm) Low Pressure Hose
  • Owner's Manual
  • First Stage:  Genesis Dry Air Demand (DAD)
  • Mechanically Balanced Flow-By Piston
  • Flow-By Piston: "Fail Safe" Mechanism
  • Excellent Breathing Characteristics at Full or Low Cylinder Pressures
  • Marine Grade Chrome Plated Brass for Long Life and Durability
  • Dry Air Demand (DAD) Design: 
    Keeps Intricate Components Clean and Contaminate Free 
    No Messy Oils or Grease as with More Sophisticated Designs 
    Environmentally Sealed w/o the Mess! 
    Seals-Out Sand, Silt, Salt and Chlorine Contaminates 
    Less Maintenance
  • Two 7/16" Threaded High Pressure (HP) Ports
  • Four 3/8" Threaded Low Pressure (LP) Ports
  • High Capacity Inlet Filter for Smooth Delivery of Air to Second Stage
  • Second-Stage:  Genesis GS2000 Balance 2nd Stage
  • Delivers Air Effortlessly
  • Venturi Pre-Dive/Dive Switch:
    Eliminates Sensitivity 
    Great for Swimming Thru-Surf, Jumping-Off Back of Boat, or Fining in Current 
    Allows High Performance Breathing when Needed
  • Non-Corrosive ABS/Polycarbonate Housing
  • Corrosion Resistant Passivated (302) Stainless Steel Demand Valve Lever
  • Breathing Resistance Adjustment Knob:
    Adjustable for Optimal Resistance
    Once Adjusted, 2'nd Stage Automatically Compensates for Changes in Ambient Pressure
    Smooth and Easy Breathing from Start to Finish of Dive
  • Orthodontic Mouthpiece: Reduced Jaw Fatigue

Genesis "GS2000" Regulator GR450 Customer Reviews Powered by TurnTo®

Review Summary


(based on 44 reviews)


of respondents would recommend this to a friend.

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Most Liked Positive Review


Good to go

This is a good first regualtor. The only thing I do not like is the little switch on top. It has two positions. One for diving and the other for, I believe, maintenance. OK, which is which? I don't recall. There should be a better indication on the switch other than + and -.


Most Liked Negative Review


Good to go

This is a good first regualtor. The only thing I do not like is the little switch on top. It has two positions. One for diving and the other for, I believe, maintenance. OK, which is which? I don't recall. There should be a better indication on the switch other than + and -.

Reviewed by 44 customers

Displaying reviews 1-5

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good deal an is absolutely trustful by the time to dive


Genesis GS 2000 Regulator


from Swansboro, NC, US

I have owned this regulator for 16 years and only purchased this new one when the purge cover cracked. Didn't want to lose any dive time while having it repaired. Love the dry first stage and the ability to perfectly regulate the flow to the second stage to meet my needs on any given dive.


Great Reg.


Wife and I have had these 6 years, 100+ dives and have never had a problem. 57 - 80 degree water and deepest depth is 147' . They breathe easy and consistently except when you're on your back. I highly recommend a softer and more flexible hose though. After 5 dives a day for a week jaw fatigue sets in due to the hard hose and trying to look at everything. Otherwise this is a great problem free reg.


Best reg I've owned in 12 years!


I have owned my GS2000 since 2001 (same reg as I just bought). I dove countless wrecks and have been diving the exhibits of Mystic Aquarium (Connecticut) for the past 3 years with this reg. I love it - it actually breathes better than my Aqualung Legend which cost twice as much. After 12 years and over 400 dives, the outer membrane of the purge valve tore and, though it still works, I figured it's time for a new one. Great reg though.


Nice reg for the money


Nice reg for the money, I like the adjustor however this reg does tend to free-flow easily which was a little annoying. Mouth piece is way too small for me and upgraded to a "seacure" mouldable mouth piece which was an awesome purchase, just came back from Sipadan after 16+ dive no jaw fatigue with "seacure"

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Questions & Answers Powered by TurnTo®

Questions about this item:

Shopper  Why Did You Choose This?
Peggy Higgins H  Suggested by certified instructor.
JOSHUA H  Liked the reviews.
MIKE L  Hard to find an adjustable in this price range - this is it.
BRIAN D  I love it, easy to adjust and works every time. Perfect.
DAVID L  Another member of our dive team uses this regulator all over the world when he dives, so he puts his trust in it, then I thought it would be ok for myself.
RONALD F  Great reg for the price - Have been diving with mine for years and works GREAT!
Eric F  What is the maximum depth at which it can be used? In the Blue Hole (Belize) I expect to go to 175 feet.
MARSHALL B  Not really sure. One thing I do know is that it is very wet when you breath through it. I would not use it. I tried to return it but they would not except it due to it had been 6 months. Don't figure I only used it one time.
HOPE L  I've only been 140 ft with it and it worked fine. I found it to be harder to suck in the air with but once I got use to the amount of pressure needed it was fine. Hope you are using nitro at that depth. I didn't use mine with nitro, just regular air. Using nitro might help since it's a lighter gas.
Eric F  Thanks for the reply. I think you meant to say "I hope you are NOT using Nitrox" as a 32% nitrox mix is unsafe beyond 112 feet.
W S  When diving with GS2000, and looking forward heads up, inhaled air is damp. With head down looking at my fins, water is coming through inhaled air--can hear water flowing going by diaphragm- what should I do?
Frank L  I would bring it to an authorized service technician first to make sure there is nothing wrong. Some regs do breathe wet in certain positions.
Bill S  I found a pine needle which floated into diaphragm housing through exhaust port
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