





PACKAGE INCLUDES:
See Options
Review Summary
First Stage: Marine Grade Black Anodized Brass
Second-Stage: Delrin Plastics, Rubber, Stainless Steel, Chrome Plated Brass & Silicone Rubber
Over-Balanced Diaphragm First Stage
4-Fixed 3/8" Threaded
2-High Pressure 7/16" Threaded
Up to 40% Oxygen
Pneumatically Balanced Servo Controlled Valve
3/8"
30" (76cm)
Housing: Chrome Plated Brass, Lens: Tempered Glass, O-Rings: Viton
0 to 5,000 psi or 0 to 360 Bars
Yes
Included w/Viton O-Rings
Bourdon Tube
Yes
Hose: Braided w/Rubber Jacket
Hose Fittings: Chrome Plated Brass
Spare/Replacement High-Pressure Hose
HP
6" (15cm), 9" (23cm), 24" (61cm) & 28" (71cm)
7/16" Male
Stage Kit
Deco/Safety Stop Bottle Connection
Clamps & Bolt Snaps: Stainless Steel
Hose Retainers: EPDM
Line: Braided Nylon
Cover: Rubber
AL40 or 80 cu. ft.
Swiveling Spring Loaded Bolt Snaps
Cylinder Clamp
020545200970
- Hollis DC7 500SE Regulator with Maxflex Hose -
Introducing the Hollis Gear DC7 Regulator, a high-performance system that combines an over-balanced diaphragm first stage with a servo-controlled second stage for exceptional airflow and precision. This regulator is designed to meet the strict CE standard for cold-water performance, and its environmentally sealed first stage ensures the delicate internal parts remain protected from contaminants like salt, sand, and chlorine.
The DC7 First Stage Regulator features a secondary diaphragm that completely seals the main spring cavity, providing excellent resistance to freezing or corrosion in icy or contaminated waters. Crafted from marine-grade brass with a black anodized finish, this DIN 300 bar (4350 psi) first stage offers four low-pressure (LP) and two high-pressure (HP) ports for optimal hose routing in both back-mount and side-mount configurations. Nitrox compatible up to 40%, this regulator requires less maintenance than models that expose internal mechanisms to contaminants.
The 500SE Second Stage utilizes a servo-controlled valve in a side exhaust configuration to deliver unparalleled performance for both air and tri-mix divers. Its innovative design ensures a gentle inhale activates the valve, providing increased airflow through multiple ports. This pneumatically balanced regulator features a large soft purge cover for easy clearing, a patented orthodontic mouthpiece for comfort, and can be configured for left or right positioning without any upside-down issues.
Designed with recreational divers and underwater photographers in mind, the side exhaust configuration keeps bubbles away from the face. Constructed from durable materials like Delrin plastics, rubber, stainless steel, and chrome-plated brass, the DC7 500SE Regulator comes standard with a 30-inch Maxflex hose for enhanced flexibility and reduced jaw fatigue. The package also includes a bolt snap tie point and an owner's manual for your convenience.
- Hollis Pressure Gauge Brass Module w/o Boot -
The Hollis Brass Pressure Gauge is a solid and compact brass SPG. This rugged and easy-to-read gauge works great as a primary or even backup pressure gauge for the beginner to the most advanced technical diver. Gauge has a luminescent face for easy reading in low light or night diving conditions. Pressure gauge module has a durable tempered glass scratch resistant lens.
Gauge is oxygen cleaned with an air-spool equipped with Viton O-rings, so its oxygen compatible to 100% O2. Gauge is available imperial or metric with a pressure readout of 0 to 5,000 psi or 0 to 360 bars. The Gauge has a red color-coded readout of 0 to 700 psi (50 bars) for safety reserve air. The gauge housing is manufactured from chrome plated brass with an accurate bourdon tube mechanism. Gauge measures 2" (50.8 mm) in diameter. For gauge boot see SKU: HLSPGBO.
Warranty Information
This product has a limited warranty of 24 months.
- Hollis High Pressure Hose -
You have a Hollis Submersible Pressure Gauge (SPG) see SKU: HLSPGM and need just the right length Hose for your set-up. Do you need a short hose for use with a stage bottle or a full-length hose for your primary regulator? Whatever your need is Hollis has a hose to match those needs. Hose is available in 6" (15cm), 9" (23cm), 24" (61cm) and 28" (71cm) lengths. Hose is a durable braided with rubber jacket hose and comes equipped with corrosion resistant chrome plated brass fittings. Hose has a 7/16" male threaded end for attachment to your first stage regulators high pressure port. Hose is complete with O-rings, so it's ready for hook-up out-of-the-box.
- Hollis Deluxe Stage Kit for Aluminum Tanks -
The Hollis Deluxe Stage Kit is designed for setting-up a stage bottle for decompression or safety stops. Deluxe Stage Bottle Kit is available for either AL40 or 80 cubic foot cylinders. The Kit includes all required hardware to securely rig your stage or deco bottles for technical diving. The preassembled kit contains a stainless-steel cylinder clamp with nylon cover to prevent abrasion of the cylinder finish, two HD EPDM hose retainers to keep the system streamlined to prevent snagging in ascent line rigging, two 3.5" (8.9cm) stainless-steel swiveling spring loaded bolt snaps attached to a braided nylon line that allows kit to be cut away in an emergency and a rubber cover for nylon line for easier carry of bottles to and from dive site.
Warranty Information
This product has a limited warranty of 12 months.
https://www.hollis.com/support/warranty
510-729-5110