8mm Duotight Inline Regulator with Integrated Gauge is a compact pressure-control device designed for use with compatible gas and liquid systems. It allows downstream pressure to be adjusted independently while the built-in gauge provides a clear reading of the regulated output.

The regulator is designed to suit tubing with an 8mm or 5/16-inch outside diameter, including compatible EVABarrier tubing. It can be used in homebrew kegging, water supply, compressed-air and gas-distribution applications where controlled pressure is required.

This model is supplied with a 0–60psi gauge as standard, while the regulator body is designed to suit inlet pressures up to 150psi.

Compact Inline Pressure Control

Inline regulators are useful when different parts of a system require different pressures.

They may be installed downstream from a primary regulator or water supply to create a separate pressure zone.

Common applications include:

• Running one keg at a different serving pressure
• Controlling pressure to a PET keg
• Supplying sparkling water
• Reducing mains water pressure
• Controlling compressed air
• Managing nitrogen or CO₂ lines
• Supplying beverage equipment
• Testing low-pressure systems

The compact design makes it easier to install inside kegerators, under benches or within organised gas and water boards.

Integrated 0–60psi Gauge

The built-in pressure gauge removes the need to install a separate external gauge.

It allows the user to monitor the regulated downstream pressure while making adjustments.

The standard gauge range is:

• 0–60psi

This range is suitable for many common homebrew, gas and water-pressure applications.

For best results, adjust the pressure gradually and check the reading after downstream pressure has stabilised.

Compatible with 8mm EVABarrier Tubing

The 8mm Duotight Inline Regulator with Integrated Gauge includes push-in connections designed for tubing with an 8mm outside diameter.

Recommended tubing may include:

• 4mm ID x 8mm OD EVABarrier tubing
• 5mm ID x 8mm OD EVABarrier tubing

The internal diameter affects flow and pressure performance.

A 4mm internal diameter provides more resistance and may be preferred for higher-pressure applications such as mains water. A 5mm internal diameter provides greater flow where maximum pressure performance is not required.

Gas and Liquid Compatibility

This regulator is suitable for compatible gas or liquid applications.

Potential media include:

• Carbon dioxide
• Nitrogen
• Compressed air
• Mains water
• Other compatible gases
• Other compatible liquids

Always confirm that the tubing, fittings and connected equipment are chemically compatible with the substance being used.

Do not use the regulator with hazardous, corrosive or unsuitable fluids.

Suitable for Mains Water Pressure

The regulator may be used to reduce mains water pressure before it reaches compatible appliances or beverage equipment.

Potential uses include:

• Carbonation systems
• Water dispensers
• Under-bench chillers
• Beverage equipment
• Filtration systems
• Brewing water setups
• Other compatible water-fed devices

For higher-pressure water applications, 4mm ID x 8mm OD tubing is recommended due to its increased pressure resistance.

Kegging Applications

An inline regulator can provide a simple way to create a lower-pressure branch within a kegging system.

For example, a primary CO₂ regulator may supply a manifold, while the inline regulator reduces pressure to one selected keg.

This can be useful for:

• Serving ale at lower pressure
• Running beer and sparkling water together
• Carbonating different beverages
• Supplying portable PET kegs
• Operating multiple pressure zones
• Balancing specialised draught setups

The regulator reduces downstream pressure only. It cannot increase pressure above the incoming supply.

Pressure Ratings

The regulator body is designed to suit inlet pressures up to 150psi.

However, this unit is supplied with a 0–60psi gauge.

Never exceed:

• The regulator’s pressure rating
• The gauge range
• The pressure rating of the tubing
• The rating of connected fittings
• The vessel’s safe working pressure
• The appliance manufacturer’s limits

The safe pressure of the complete system is always determined by its lowest-rated component.

General Installation Guide

A typical installation process includes:

1. Turn off the gas, air or water supply.
2. Release all downstream pressure.
3. Cut the 8mm tubing squarely with a sharp tube cutter.
4. Check the tube end for damage.
5. Push the inlet tubing fully into the regulator.
6. Push the outlet tubing fully into the opposite fitting.
7. Confirm both tubes pass the internal seals.
8. Restore the supply slowly.
9. Adjust the regulator gradually.
10. Monitor the integrated gauge.
11. Check every connection for leaks.
12. Confirm the downstream pressure under normal flow.

Do not use tubing that is scratched, crushed or cut at an angle.

Correct Duotight Installation

For a secure push-fit connection:

• Cut tubing at 90 degrees
• Keep the outside surface clean
• Push the tube firmly into the fitting
• Make sure it passes both sealing stages
• Pull back gently to confirm it has locked
• Pressure-test before regular operation

Incomplete insertion is a common cause of leaks.

Removing the Tubing

Before removing tubing:

1. Turn off the supply.
2. Release all trapped pressure.
3. Push the fitting collar inward.
4. Hold the collar down.
5. Pull the tube out carefully.
6. Inspect the end before reuse.

Never remove tubing from a pressurised fitting.

Adjusting Pressure

When setting the output pressure:

1. Start with the regulator at a low setting.
2. Open the upstream supply.
3. Increase the setting gradually.
4. Allow the gauge to stabilise.
5. Check pressure while the system is flowing.
6. Fine-tune as required.

Static pressure and flowing pressure may differ, particularly in water and air systems.

Leak Testing

Leak-test the system after installation or adjustment.

For gas systems, apply a suitable leak-detection solution around:

• Inlet fitting
• Outlet fitting
• Tubing entry points
• Gauge connection
• Regulator body

For water systems, inspect each connection under normal pressure and flow.

If a leak is found, shut off the supply and release pressure before correcting it.

Important Notes

• Designed for 8mm or 5/16-inch outside-diameter tubing.
• Supplied with a 0–60psi gauge.
• Regulator body suits inlet pressures up to 150psi.
• Suitable for compatible gas or liquid.
• Suitable for mains water applications.
• Recommended with 4mm x 8mm or 5mm x 8mm EVABarrier tubing.
• Use 4mm ID tubing where higher pressure resistance is required.
• Use 5mm ID tubing where increased flow is preferred.
• Tubing is not included unless stated separately.
• The regulator cannot increase pressure.
• Always release pressure before removing tubing.
• Never exceed the rating of the lowest-rated system component.

8mm Duotight Inline Regulator with Integrated Gauge offers a compact and convenient way to control pressure in compatible gas, air and water systems. Its push-fit connections and built-in gauge make it a practical choice for kegging, mains water and equipment installations where clear and adjustable downstream pressure is required.