Hp Hoses

High Pressure (HP) Scuba Pressure Gauge Hoses: Rubber, Miflex, Halcyon and Scubatec

High Pressure (HP) scuba hoses are essential components of every scuba diving system. They connect the high-pressure port of the first stage regulator to a submersible pressure gauge (SPG), pressure console or, where supported by the manufacturer, specific pressure monitoring devices.

An HP hose continuously transmits cylinder pressure, allowing divers to monitor their remaining gas supply throughout the dive. Because of their critical safety role, choosing a reliable, high-quality HP hose is essential for every recreational and technical diver.

In this category you'll find a complete range of HP pressure gauge hoses available in different lengths, materials and configurations, suitable for recreational diving, technical diving, DIR, Hogarthian, sidemount, stage, decompression and CCR systems.

Our range includes traditional rubber hoses, braided Miflex hoses, Halcyon hoses and Scubatec models, carefully selected for their reliability, durability and long-term performance.

How to Choose the Right HP Hose

Selecting the correct HP hose mainly depends on your equipment configuration, hose routing and the desired position of your pressure gauge during the dive.

The hose length affects comfort, streamlining and ease of reading the SPG. A hose that is too long may create unnecessary loops and increase the risk of snagging, while one that is too short may prevent proper positioning of the pressure gauge.

The following table shows the hose lengths most commonly used by divers in different configurations.

Important: These measurements represent the most common diving configurations. The ideal hose length may vary depending on the first stage, hose routing, equipment setup and individual diver preferences.

What's the Difference Between HP and LP Hoses?

HP (High Pressure) hoses are specifically designed to withstand full cylinder pressure and are used exclusively to connect pressure gauges, consoles and certain pressure monitoring systems.

LP (Low Pressure) hoses, on the other hand, carry intermediate pressure from the regulator first stage and supply breathing regulators, octopus regulators, BCD inflators and drysuit inflation valves.

The two hose types are not interchangeable. HP hoses use the standard 7/16" UNF thread, while LP hoses normally use the 3/8" UNF thread. These different thread sizes are intentionally designed to prevent incorrect installation and ensure maximum diving safety.

Rubber, Miflex, Halcyon and Scubatec HP Hoses

HP pressure gauge hoses are available in different materials, each offering specific advantages in terms of flexibility, durability, hose routing and overall diving comfort.

Rubber HP Hoses

Traditional rubber HP hoses have been the standard choice for recreational and professional divers for many years. They offer excellent durability, high abrasion resistance and maintain their position well once routed.

They are particularly appreciated by divers looking for a robust, reliable and straightforward solution.

Miflex HP Hoses

Miflex HP hoses feature a high-strength inner core protected by an extremely flexible braided outer layer.

Compared to conventional rubber hoses, they are generally lighter and considerably more flexible, allowing cleaner hose routing while reducing stress on the fittings.

They are widely used by both recreational and technical divers who prefer a streamlined equipment configuration.

Halcyon HP Hoses

Halcyon HP hoses are designed to provide outstanding reliability in demanding technical diving environments.

They are particularly popular among DIR and Hogarthian divers thanks to their excellent build quality, flexibility and ability to maintain a very clean hose routing.

Scubatec HP Hoses

Scubatec HP hoses offer an excellent balance between reliability, durability and versatility. Available in multiple lengths and configurations, they are suitable for both recreational and technical diving.

Compatibility with SPGs and Pressure Transmitters

HP hoses are primarily used to connect the regulator first stage to submersible pressure gauges (SPGs), pressure consoles and certain pressure monitoring systems.

Most modern first stages use the standard 7/16" UNF high-pressure port, making today's HP hoses compatible with the vast majority of scuba regulators.

Complete your equipment with our dedicated categories:

• Scuba Pressure Gauges (SPGs)
• Pressure Transmitters
• Scuba Hose Accessories
• Scuba Hose O-Rings
• All Scuba Hoses

What Is an Air Spool?

An often overlooked but essential component is the air spool (also known simply as the SPG spool).

The air spool is installed between the HP hose and the pressure gauge, allowing the SPG to rotate freely while maintaining a high-pressure seal.

It consists of a small metal cylinder fitted with two O-rings that ensure a leak-free connection throughout the dive.

Whenever servicing or replacing an HP hose, it is good practice to inspect the air spool and its O-rings, replacing them whenever signs of wear are found.

HP Hoses for Recreational, DIR, Sidemount and CCR Diving

The ideal HP hose length depends entirely on the equipment configuration.

Recreational divers typically use hoses between 60 and 80 cm, while DIR backmount configurations generally use hoses between 60 and 65 cm, allowing the pressure gauge to be clipped neatly to the left waist D-ring.

Stage and sidemount configurations usually employ very short hoses, typically between 15 and 20 cm, keeping the pressure gauge close to the first stage while minimising hose loops.

CCR (Closed Circuit Rebreather) configurations vary considerably depending on the unit. HP hoses commonly range between approximately 100 and 138 cm, according to the manufacturer's routing recommendations and the diver's personal setup.

To learn more about technical diving configurations, read our article:

DIR System in Scuba Diving: Philosophy, Configuration and Benefits.

Quality, Safety and Maintenance

HP hoses operate under the full pressure of the scuba cylinder and should therefore be inspected regularly as part of routine equipment maintenance.

Before every dive, check for cracks, cuts, bulges, corrosion around the fittings or any sign of leakage. If any damage is detected, the hose should be replaced immediately.

During regulator servicing, technicians should also inspect the air spool and replace its O-rings whenever necessary to ensure a reliable seal.

Using high-quality hoses and replacing worn components helps prevent failures and ensures reliable pressure monitoring throughout every dive.

Useful Resources

• Scuba Regulators: Complete Guide to Selection, Maintenance and Servicing
• DIR System in Scuba Diving: Philosophy, Configuration and Benefits
• DIR Long Hose: Why 210 cm Is the Standard
• How to Choose a Dive Computer

Buy HP Pressure Gauge Hoses Online at Momodive

At Momodive you'll find a complete range of HP hoses for scuba pressure gauges, available in different lengths, materials and configurations for recreational, technical, sidemount and CCR diving.

Choose from premium products by Halcyon, Miflex and Scubatec, selected for their reliability, durability and long-term performance.

If you are unsure which HP hose best suits your regulator or diving configuration, our team will be happy to help you select the correct model.

Frequently Asked Questions about HP Pressure Gauge Hoses

Are all HP hoses compatible with every scuba regulator?

Most modern regulators use the standard 7/16" UNF high-pressure port, making today's HP hoses compatible with the vast majority of first stages. Always verify compatibility with your specific equipment before purchasing.

Which HP hose length should I choose?

The ideal length depends on your diving configuration. Recreational divers generally use hoses between 60 and 80 cm, DIR backmount configurations commonly use 60–65 cm hoses, sidemount and stage cylinders typically use 15–20 cm hoses, while CCR systems may require hoses ranging from approximately 100 to 138 cm depending on the unit.

What's the difference between rubber and Miflex HP hoses?

Rubber hoses are robust, durable and maintain their routing well. Miflex braided hoses are lighter, significantly more flexible and help achieve cleaner hose routing with reduced stress on the fittings.

When should an HP hose be replaced?

HP hoses should be inspected before every dive and replaced immediately if cracks, bulges, cuts, corrosion or leaks are present. Regular inspection during regulator servicing is also strongly recommended.

Can I replace only the hose without changing the pressure gauge?

Yes. In most cases the hose can be replaced independently, provided the thread compatibility is correct. Whenever replacing an HP hose, it is also advisable to inspect the air spool and replace its O-rings if necessary.