ResMed H5i Flip Lid

Description

Quick answer: This is the genuine ResMed replacement flip lid for the H5i heated humidifier water tub (part 36891). The flip lid is the hinged top that closes over the water tub and keeps the humidifier chamber sealed. Replacing a cracked lid, a broken hinge, or a lid that no longer closes snugly restores a proper seal — without having to replace the entire water tub.

What’s included

• 1 × ResMed H5i flip lid (part 36891)

Water tub, seal, and humidifier not included. The lid seal is a separate part (36892).

About this part

The H5i water tub is closed by a hinged flip lid. Together with its silicone seal, the lid keeps the chamber airtight so the humidifier can deliver moisture properly and water stays where it belongs. The lid is opened and closed every day for refilling and cleaning, which is exactly why hinges and latches eventually wear.

Typical reasons to replace the lid: a cracked or broken hinge, a lid that won’t stay closed or feels loose, visible cracks in the plastic, or leaks that persist even after fitting a fresh seal. If the lid itself is fine and you’re only seeing leaks, the seal (36892) is usually the cheaper first thing to try.

Key features

• Genuine ResMed flip lid (36891) — correct fit for the H5i water tub.
• Restores a secure closure — fixes a loose, cracked, or broken lid.
• Works with the H5i seal (36892) — seal sold separately.
• Cheaper than a full tub replacement — replace just the part that failed.
• Easy to fit — no tools required.

Specifications

Lid, seal, or whole tub — which do I need?

• Leaking, but the lid closes fine → try the seal (36892) first; it’s the usual culprit and the cheapest fix.
• Cracked lid, broken hinge, or lid won’t stay closed → you need this lid (36891).
• Tub is cloudy, heavily scaled, or cracked → replace the water tub (36800).

If you’re not sure which part has failed, contact us at (646) 933-0080 and we’ll help you work it out.

Frequently asked questions

What does the flip lid do?
It’s the hinged top that closes over the H5i water tub, keeping the humidifier chamber sealed.

Which humidifier does it fit?
The ResMed H5i heated humidifier water tub (S9 platform).

Is the seal included?
No — the silicone lid seal is a separate part (36892).

My tub is leaking — do I need the lid or the seal?
If the lid closes properly, start with the seal (36892). If the lid is cracked, loose, or the hinge is damaged, you need this lid.

Do I need a prescription?
No — replacement humidifier parts do not require a prescription.

Can I get it delivered in Brooklyn or shipped nationwide?
Yes — Stark Medical Supplies offers local pickup and delivery in Brooklyn and across NYC, plus USPS shipping throughout the continental U.S.

Use with a compatible ResMed H5i humidifier tub according to the device’s user guide. Ensure the lid and seal are correctly fitted before use.