SEAC IT300 Cold-Water Regulator Set
The SEAC IT300 Regulator Set is a lightweight, dependable regulator package designed for recreational single-cylinder diving. Combining a balanced diaphragm first stage with an ergonomic IT300 second stage and matching alternate air source, it delivers consistent breathing performance in both UK and overseas diving conditions.
Cold-water approval, practical hose routing and a choice of DIN or INT connection make the IT300 a versatile option for newly qualified divers, experienced recreational divers and anyone looking for a travel-friendly regulator set.
Balanced Diaphragm First Stage
The IT300 first stage uses a balanced diaphragm design to provide consistent airflow as cylinder pressure and depth change. Its cold-water approval makes it suitable for diving in water below 10°C, including typical UK inland and coastal conditions.
The first-stage body is precision machined to reduce unnecessary weight while retaining strength and durability. Its chrome-plated finish provides a clean appearance and additional protection for regular diving use.
Flexible Hose Configuration
The IT300 first stage provides:
- Two high-pressure ports for a pressure gauge or transmitter
- Four low-pressure ports for second stages and inflation hoses
- Ergonomically oriented ports for practical hose routing
- A choice of 300-bar DIN or 230-bar INT connection
This port arrangement allows the regulator to be configured neatly for a standard recreational setup, including a primary second stage, octopus, BCD inflator and drysuit inflator where required.
IT300 Second Stage
The SEAC IT300 second stage features a Dive/Pre-Dive control that regulates the Venturi effect. Moving the control into the Pre-Dive position helps reduce the risk of unwanted free flow when entering the water or when the regulator is not in the diver’s mouth.
Its oversized, soft polyurethane purge button is easy to locate and operate, even when wearing thick diving gloves. Openings in the front cover help manage water flow around the diaphragm and reduce the likelihood of current-induced free flow.
Clearer Field of Vision
The specially shaped exhaust deflector channels exhaled bubbles towards the sides of the diver’s face. This helps keep bubbles away from the field of vision while also reducing the possibility of water entering through the exhaust valve in strong side currents.
Matching IT300 Octopus
The included SEAC IT300 Octopus provides a clearly identifiable alternate air source for recreational buddy diving. It features a yellow front cover and hose, a Dive/Pre-Dive Venturi control and a generously sized purge button for straightforward operation during an air-sharing situation.
Cold-Water Approved
The SEAC IT300 is approved for cold-water use and complies with the applicable EN 250 standard. This makes it suitable for year-round UK diving, drysuit diving and other environments where water temperatures may fall below 10°C.
Lightweight and Travel Friendly
The compact first stage and lightweight construction make the IT300 a practical choice for travelling divers. It provides cold-water capability for diving at home while remaining manageable when packing equipment for overseas trips.
Protective Regulator Bag Included
The complete set is supplied with a SEAC Mate regulator bag. Its protective construction helps keep the first stage, second stages and hoses organised during storage and transport.
What Is Included?
- SEAC IT300 balanced diaphragm first stage
- SEAC IT300 primary second stage
- SEAC IT300 Octopus alternate second stage
- Primary and octopus low-pressure hoses
- SEAC Mate regulator bag
- Choice of DIN or INT connection, where selected
Key Features
- Complete primary and alternate regulator package
- Balanced diaphragm first stage
- Dive/Pre-Dive Venturi control
- Two high-pressure and four low-pressure ports
- Ergonomically oriented ports for clean hose routing
- Large, glove-friendly purge button
- Exhaust deflector directs bubbles away from the face
- Reinforced hose guards help reduce kinking
- Cold-water approved for temperatures below 10°C
- Available with 300-bar DIN or 230-bar INT connection
- Made in Italy
- Protective regulator bag included
Ideal For
- Recreational single-cylinder diving
- Newly qualified and experienced divers
- UK and cold-water diving
- Drysuit and thick-wetsuit configurations
- Warm-water and overseas diving
- Divers wanting a lightweight regulator set
- Divers seeking a complete primary and octopus package
Please note: A pressure gauge, transmitter and BCD or drysuit inflator hose are not included unless specifically stated. Select the correct DIN or INT connection for your cylinder valve when ordering. Regulators should be inspected, configured and serviced by a suitably qualified technician in accordance with SEAC’s recommendations.


