Two genuine ResMed water tubs, two different designs

The tab helps identify them.

White tab: standard watertub

The standard water tub is intended for routine home usewith distilled water and hand cleaning according to the manufacturer’s careinstructions.
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Grey tab: cleanable watertub

The grey-tab version is the more durable cleanable model.It is designed for users who need a tub that tolerates more demanding cleaningand repeated use.

The higher price does not mean that every userautomatically needs it.

The appropriate choice depends on:

• the water being used;
• the cleaning routine;
• how frequently the tub is handled;
• and whether greater durability is useful to the patient.
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A replacement part can look like a better bargain becausethe purchase price is lower. But price alone does not tell us whether thematerials, intended use and expected durability are equivalent.

This is why we try to identify the exact part beforecomparing prices.
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The next practical step

Check whether your current tub has a white or grey tab.Follow the care instructions for that model and inspect it regularly fordeposits, damage or deterioration.