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About Hollis DC7 500SE Regulator with MAXFLEX Hose

The Hollis Gear DC7, 500SE Regulator incorporates a High Performance Over-Balanced Diaphragm First Stage that provides Progressively Greater Intermediate Pressure as Depth and Gas Density Increases for Superior Gas Delivery under the Most-Extreme Conditions. This Regulator System is designed to withstand the Rigorous CE Standard for Coldwater Performance. The Balanced Diaphragm, First Stage Regulator is inherently Environmentally Sealed. The benefit of this type of First Stage design is that none of the Delicate Internal Parts are Exposed-to-Contaminants such as Salt, Sand, Chlorine or Pool Acids. These Environmental Contaminants can cause Corrosion and Mineral Deposits to form on the Internal Mechanism Deteriorating Regulator Performance. A Diaphragm First Stage Regulator requires Less-Maintenance then Regulators that allow the Contaminates to enter the Internal Mechanism.

In addition the DC7 First Stage Regulator has a Secondary Diaphragm to completely Seal-Off the Main Spring Cavity. A Sealed Balanced Diaphragm design; Isolate the Main Spring Cavities Internal Components from the Environment. It also means the DC7 is excellent for Ice Diving (it won't freeze up) or Diving in Waters Filled-with-Contaminants or Sediment (it won't corrode). This DIN 300 bar (4350psi) First Stage Regulator is manufactured from Marine Grade Brass with a Black Anodized Finish and has 4-Low Pressure (LP) 3/8" Threaded Fixed Ports and 2-High Pressure (HP) 7/16" Threaded Ports. The Fixed Hose Routing is Ideal for both Back Mount and Side-Mount Configuration. The Regulator is NITROX Compatible to 40% Out-of-the-Box.

Old School, New Tech, the new 500SE Utilizes a Servo Controlled Valve to provide Precision Airflow and Unparalleled Performance for both AIR-and-TRIMIX Divers in a Side-Exhaust Configuration. To achieve this, Hollis Gear has perfected the Original "Lever-Servo Valve" they designed 35 years ago. The smallest, gentlest inhale starts the servo valve working as air starts to flow into the second stage it creates a vacuum behind the diaphragm, drawing it inwards and quickly opening the valve further. Air flow is increased by allowing it to flow through multiple valve ports rather than a single port.

This Pneumatically Balanced Regulator has a Large Soft-Purge Cover or Easy Clearing of the Regulator, Patented Orthodontic Mouthpiece for Comfort and Reduced Jaw Fatigue. Regulator is Easy to Disassemble without the use of Tools and even Underwater if necessary. Regulator can be configured for Left-or-Right Positioning, no Upside Down. The obvious feature of the Side Exhaust Configuration is that Bubbles don't get in a Diver's Face when they Exhale. Recreational Divers and especially Underwater Photographers will appreciate that. Regulator is made from Impact Resistant DELRIN Plastics, Rubber, Stainless Steel and Chrome Plated Brass with Silicone Rubber Components. The Hollis Gear DC7, 500SE Regulator comes standard with a 30" (76cm) MAXFLEX Hose. The MAXFLEX Hose is a Lightweight, Flexible, Braided Hose designed to Outperform and Outlive Traditional Rubber Hoses. The Hoses Flexibility further Reduces-Jaw Fatigue. The Regulator also comes equipped with a Bolt Snap Tie Point; Owner's Manual and is covered by a 24 month limited warranty.

The Hollis DC7 500SE Regulator with MAXFLEX Hose is commonly used for Extreme Depths and more. The Hollis DC7 500SE Regulator with MAXFLEX Hose is popular because customers like the following qualities of the Hollis DC7 500SE Regulator with MAXFLEX Hose: Effortless breathing, Nitrox Compatible.

Warranty Information

This product has a limited warranty of 24 months.

www.hollis.com/support/warranty/
(510) 729-5110

Hollis DC7 500SE Regulator with MAXFLEX Hose Features

  • Regulator System Designed to Meet Rigorous CE Standard for Coldwater Performance
  • High Performance Regulator System
  • 30" (76cm) MAXFLEX Hose:
    Hoses Flexibility Reduces-Jaw Fatigue
    Lightweight, Flexible, Braided Hose Designed to Outperform and Outlive Traditional Rubber Hoses
  • Bolt Snap Tie Point
  • CD Owner's Manual
  • 2 Year Limited Warranty
  • First Stage:
  • Hollis DC7
  • Over-Balanced Diaphragm First Stage
  • Provides Progressively Greater Intermediate Pressure with Increased Depth and Gas Density
  • Dual Diaphragm Design: Completely Seals Internal Components from Environment
  • Environmental Sealing Prevents Icing
  • 4-Fixed Low Pressure Ports (LP) with 3/8" Threads
  • Fixed Hose Routing: Ideal for Back Mount and Side-Mount Configuration
  • DIN 300 bar (4350psi) First Stage Regulator
  • NITROX Compatible to 40% Out-of-the-Box
  • Marine Grade Brass with Black Anodized Finish
  • Second Stage: Hollis 500SE
  • Old School, New Tech
  • 500SE Utilizes a Pneumatically Balanced Servo Controlled Valve
  • Precision Airflow and Unparalleled Performance
  • Hollis Gear Perfected the Original "Lever-Servo Valve" they Designed 35-Years Ago
  • Multiple Valve Ports for Ease-of-Breathing
  • Large Soft-Purge Cover or Easy Clearing Regulator
  • Patented Orthodontic Mouthpiece for comfort and reduced jaw fatigue
  • Easy to Disassemble: w/o Tools, Even Underwater
  • Left-or-Right Positioning, No Upside Down
  • Side Exhaust Configuration: Eliminates Bubbles in Diver's Face, Great for Photography
  • Impact Resistant DELRIN Plastics, Stainless Steel and Chrome Plated Brass with Silicone Rubber Components

Hollis DC7 500SE Regulator with MAXFLEX Hose Specifications

1'St Stage Type
Over-Balanced Diaphragm First Stage
Lp Ports
4-Fixed 3/8" Threaded
Hp Ports
2-High Pressure 7/16" Threaded
Nitrox Compatible
Yes
2'Nd Stage Type
Pneumatically Balanced Servo Controlled Valve
Materials
First Stage: Marine Grade Black Anodized Brass, Second-Stage: Delrin Plastics, Rubber, Stainless Steel, Chrome Plated Brass And Silicone Rubber
Hose Thread
3/8"
Hose Length
30" (76Cm)
Weight [with packaging]
Din: 2.2 lb,
Yoke: 2.7 lb
Mfr #
SKU
HLSDC75

DC7 500SE Regulator with MAXFLEX Hose Customer Reviews

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Hollis GearHollis DC7 500SE Regulator with MAXFLEX Hose
 
5.0

(based on 4 reviews)

Ratings Distribution

  • 5 Stars

     

    (4)

  • 4 Stars

     

    (0)

  • 3 Stars

     

    (0)

  • 2 Stars

     

    (0)

  • 1 Stars

     

    (0)

100%

of respondents would recommend this to a friend.

Pros

  • Effortless breathing (4)
  • Nitrox compatible (4)
  • Comfortable (3)

Cons

    Best Uses

    • Extreme depths (4)
    • Cold water (3)
      • Diving Type:
      • Open water diving (4), Wreck diving (4), Drift diving (3), Night diving (3), Outdoor professional (3)
      • Was this a gift?:
      • No (4)

    Reviewed by 4 customers

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    5.0

    hollis 500se

    By tsm3706

    from Tampa, FL

    About Me Advanced

    Pros

    • Adjustable
    • Comfortable
    • Effortless Breathing
    • Nitrox Compatible

    Cons

      Best Uses

      • Cold Water
      • Extreme Depths
      • Warm Water

      Comments about Hollis Gear Hollis DC7 500SE Regulator with MAXFLEX Hose:

      old school, new tech really does say it all! This is the same basic platform as the tried and true original oceanic omega regulator, but beefed up and infused with new technology, not even a hint of a wet breather anymore. very few moving parts means its almost fail proof. after 20 years I still dive with my oceanic omega 1 as a back up to my new 500se, if that says anything about their quality! it truly is an effortless breather at any depth and any angle of diver position! if you sip air, it will sip air with you and if you are working against a heavy current it can deliver as much air as fast as you can breathe it!

      • Diving Type:
      • Cave Diving, Deep diving, Drift Diving, Night Diving, Open Water Diving, Rescue Diving, Wreck Diving
      • Was this a gift?:
      • No

      Comment on this review

       
      5.0

      superb rag set!!!!!

      By michael

      from alpena, mi

      About Me Advanced

      Verified Reviewer

      Pros

      • Adjustable
      • Comfortable
      • Effortless Breathing
      • Nitrox Compatible

      Cons

        Best Uses

        • Cold Water
        • Extreme Depths

        Comments about Hollis Gear Hollis DC7 500SE Regulator with MAXFLEX Hose:

        great design, i am working on dive master, and took the photo courses in the great lakes. this rag set is old school so when taking pictures, the bubbles go out the side and not in front of your face. the hose is awesome and very flexible, the mouth piece is superb, no fatigue what so ever, i would recommend this to anyone.

        • Diving Type:
        • Open Water Diving, Rescue Diving, Wreck Diving
        • Was this a gift?:
        • No

        Comment on this review

         
        5.0

        great design and excellent breathing!

        By walk like egyptian

        from hurghada, egypt

        About Me Professional

        Verified Buyer

        Pros

        • Comfortable
        • Effortless Breathing
        • Nitrox Compatible

        Cons

          Best Uses

          • Extreme Depths

          Comments about Hollis Gear Hollis DC7 500SE Regulator with MAXFLEX Hose:

          ease of breathing like with my old apex xtx 200 but with the side exhaust, great for camera use!

          • Diving Type:
          • Drift Diving, Night Diving, Open Water Diving, Wreck Diving
          • Was this a gift?:
          • No

          Comment on this review

          (2 of 2 customers found this review helpful)

           
          5.0

          This beat into the dirt my ScubaPro!

          By Tim

          from Arkansas

          About Me Professional

          Pros

          • Breathes Better W Depth
          • Din But Yoke Adaptable
          • Effortless Breathing
          • Nitrox Compatible
          • Side Exhaust

          Cons

          • None

          Best Uses

          • Cold Water
          • Extreme Depths
          • Tech Diving
          • Warm Water

          Comments about Hollis Gear Hollis DC7 500SE Regulator with MAXFLEX Hose:

          Brother, if you want the finest breathing regulator on the planet - this IS it! This ain't you uncle Joe's Cobra or Possiden, this is everything they wanted to be and so much more.

          When breathing it seems there is about a .0000000001 delay while the regulator is thinking, "What does this guy need RIGHT NOW?" and it gives it to you! It is DIN but is Yoke adaptable and beautiful in it's looks and theory.

          Some have tired it and said, it free-flows too eaisly but that's only if you don't understand the reg or in fact diving science. The second stage Diaphragm is left of the mouthpiece so, when starting your dive if it gets in the water before the mouthpiece it's going to free-flow like a large, angry Cobra. Just invert the reg when putting it in the water and NO FREE FLOW!

          My top-of-the-line Scubapro has been handed down to my better half and I've been diving Scubapro for over 30 years.

          Hollis has created a monster here!

          • Diving Type:
          • Cave Diving, Cc Scc Rebreathers, Drift Diving, Night Diving, Open Water Diving, Rescue Diving, Tri-mix, Wreck Diving
          • Was this a gift?:
          • No

          Comment on this review

          Displaying reviews 1-4

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          Q&A

          Questions & Answers Powered by TurnTo®

          Questions about this item:

          Shopper  how many Hp ports on 1st stage?
          Frank L  As stated in the description, this reg has 2 high pressure ports.
          Shopper  Where is the purge button on this?
          Joe S  The purge button is in the front. Opposite of the mouthpiece.
          Shopper  how many Hp ports on 1st stage?
          Frank L  As stated in the description, this reg has 2 high pressure ports.
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