This item is no longer available. Here are Similar Regulators:

About Mares V42 Proton Metal Regulator

The Proton (V42) diaphragm first stage features the DFC system and a replaceable HP seat connector The exclusive MARES DFC system featured minimizes the intermediate pressure drop which occurs in all regulators during the inhalation phase This pressure drop is greater when higher airflow is demanded of the regulator The DFC system substantially reduces breathing effort and inhalation resistance, especially during deep dives and under high air flow conditions The high pressure poppet was designed for a "2 year or 200 dives" service interval; double the high pressure seat life standard!

Compact body, in a modern and smart style, it is made of hot-forged nickel-plating and chromed brass It is fitted with a preferential intermediate pressure port for connection to the primary second stage, plus 3 other LP ports and 2 HP ports with 7/16" UNF thread The latter are inclined at a 45° angle to allow a more ergonomic layout of hoses

Protons second stage is made of nickel and chrome-plated brass These materials offer a number of benefits: ruggedness and thinner walls which allow compact dimensions obtained without using smaller-diameter diaphragms; this result in reduced water drag The second stage ha an anti-freeze function, which is enhanced by the "radiator action" of the metal

The Proton with its Vortex Assist Design (V A D ) system: all Mares second stages offer the unique patented VAD system The air bypass tube conveys air to the mouthpiece creating a swirling vortex with a low pressure area in the center this keeps the diaphragm down during inhalation, giving very sensitive and easy breathing at all depths The second stage cover features the new "mesh-grid" system for water inflow and outflow, which provides a further performance improvement

Furthermore, the compact and ergonomic exhaust tee ensures superior hydrodynamic performance and reduced exhalation resistance The mouthpiece is made of soft hypoallergenic silicone: limiting jaw fatigue and offering a secure fit even after very long dives V42 Proton has a hose is 3/8" Threaded hose and is 29 5" (75 cm) in length Mares V42 Proton Metal comes with a limited lifetime warranty

Warranty Information

This product has a limited lifetime warranty.
(800) 874-3236

Mares V42 Proton Metal Regulator Features

  • First Stage Features:
  • Balanced Diaphragm Design
  • Super-Compact First Stage
  • New Tri-Material Valve with Superior Durability
  • HP and LP Ports Arranged for Optimum Hose Routing
  • Nickel and Chrome-Plated Brass
  • Light-Weight Perfect for Travel
  • Limited Lifetime Warranty
  • Second Stage Features:
  • Down Stream Demand
  • Made of Nickel and Chrome-Plated Brass
  • Vortex Assist Design (V.A.D.) System
  • "Mesh-Grid" System
  • Compact and Ergonomic Exhaust Tee
  • Oversized Purge Button
  • Soft Hypoallergenic Silicone Mouthpiece

Mares V42 Proton Metal Regulator Specifications

2'Nd Stage Type
Downstream Demand
Chromed Brass, Polyurethane
Hose Threads
Hose Length
29.5" (75 Cm)
Total Weight
36.93 Oz (1,047G)
Mfr #

V42 Proton Metal Regulator Customer Reviews

Write a Review


by PowerReviews
Mares V42 Proton Metal Regulator

(based on 1 review)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 1 customer

Displaying review 1

Back to top


Light, easy breathing, Stylish

By Benjy on the Rocks

from Italy - For Now

About Me Advanced

See all my reviews

Verified Reviewer


  • Adjustable
  • Comfortable
  • Compact
  • Effortless Breathing
  • Light weight
  • Nitrox Compatible


    Best Uses

    • Cold Water
    • Travel
    • Warm Water

    Comments about Mares V42 Proton Metal Regulator:

    This Regulator is fantastic, had no problems at all. It breaths easy, nice and light to travel with, and it looks super cool

    • Diving Type:
    • Drift Diving, Night Diving, Open Water Diving, Wreck Diving

    Comment on this review

    Displaying review 1

    Back to top


    Questions & Answers Powered by TurnTo®

    Questions about this item:

    Shopper  What's the difference between the V42 Proton and the 42 Proton?
    LeisurePro S  Functions are the same, the difference is in the cosmetic design/weight. Here is a whole forum discussing the differences in detail.
    Shopper  Can the Mares V42 be used with Nitrox?
    LeisurePro S  Yes, up to 40%
    Shopper  Can this regulator be used with Nitrox
    LeisurePro S  Yes, up to 40%
    Share this item: