Maintenance Tips | Maintaining Your Hoses

Here we try to offer guidance and assistance on selecting inspecting & maintaining.

Cleaning your hoses

As with all diving equipment, Miflex hoses require regular checks and maintenance and should be cleaned down after each dive to ensure they remain in good condition and to allow for regular checks.

When cleaning of your Miflex hoses and fittings to reduce the build-up of lime scale, this should be carried out with a de-scaling agent based on citric acid. As with all brass fittings, over a period of time a small build up of scale is possible and care should be taken to carefully remove this to prevent damage or restriction to the use of the hose.

A descaler based on phosphoric acid should not be used as this would cause damage to the outer layers of the hose.

Please find below details of resistance to descalers as recommended by Miflex

  • Resistant to Dekalin® at room temperature
  • Resistant to Descaler (based (10% of the weight) on formic, acetic, citric acids) at room temperature
  • Limited resistance to Descaler (based (10% of the weight) on formic, acetic, citric acids) at a temperature of 50°C (prolonged exposure to the medium may cause irreversible damage)
  • Resistant to Descaler (based (10% of the weight) on sodium hydrogen sulfate) at room temperature
  • Limited resistance to Detergent soln, heavy duty (<10% of the weight) at 80°C (prolonged exposure to the medium may cause irreversible damage)

 

General care of your Miflex hose.

Never expose your hose to any heat source , never allow your hose to be crushed. Never allow sand water or any other foreign object to enter your hose.

While in storage or during transport your hoses could become damaged in a number of ways. Never use your hose as a carrying or hanging handle for the tank. Never leave your hoses dangling with any regulator installed especially when they are without pressure. Always secure the hoses to your jacket with hooks or straps, but leave sufficient freedom for movement. These hooks or straps should be fixed directly to the regulator or close to the hose fittings.

Never secure your hose in a manner which could constantly flex or bend in the same location(i.e. create a “hinge” effect). Continuous bending at the same pivot point will shorten the life of your hose.

Never over flex your hose Never fold the hose back over itself. If your hose is too long, you may loop it and secure it in place with a section of rubber tubing (such as the inner tubing of a bicycle tire). However the minimum bending radius must be at least 3.5 times the outer diameter of the hose.

Never allow the weight of your air tank to impact or rest on any part of your hose. To prevent personal injury or damage, install the low pressure hose ONLY into a low pressure outlet of the first stage regulator.

The Hose is designed to use air or nitrogen/oxygen mixtures containing up to 40% oxygen, use of gas mixtures with increased oxygen or the addition of other substances may cause corrosion, deterioration, premature aging or failure of the hose.

The Suggested time scale for considering replacement of your hoses under service is circa 5 years or 500 dives as also recommended by the majority of diving equipment manufactures and en standards.