FitMatch
ResMed H5i water tub (S9)

CPAP machine water tub

ResMed H5i water tub (S9)

36800

Fits 4 models

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Genuine

$69.50

CPAP Direct · 1 Nov

Compatible

See seller

No compatible seller tracked yet

Genuine: made by ResMed. Compatible: another brand.

Lowest price · $69.50

CPAP Direct. Every seller we track is listed below. Some links earn us a commission.

Open CPAP Direct

Compare 4 sellers

AUD, before delivery. Each price shows when it was checked.

CPAP DirectGenuine · checked 1 Nov$69.50Open
ResMed AustraliaGenuine · checked 1 Nov$105.00Open
CPAP AustraliaGenuine · checked 1 Nov$105.00Open
The CPAP ClinicGenuine · checked 1 Nov$129.95Open
Open cheapest seller · $69.50

Opens CPAP Direct in a new tab. Their page is the source of truth for price, delivery and returns.

How long it lasts

Replace it when it leaks, or is cracked or damaged; ResMed's S9 pages give no set interval.

After replacing: No reset: the S9 has no tub-life counter.

How to change the 36800 water tub

Watch the guide or follow the steps.

CPAP Machine and Humidifier maintenance for the Resmed S9 · SleepRightAustralia
  1. 1Turn the S9 off, unplug it and let the H5i cool.
  2. 2Open the H5i lid and lift out the old water tub.
  3. 3Fill the new tub with water up to the maximum mark.
  4. 4Put the tub back in the H5i and close the lid until it clicks.
Every number this part goes by
Retail name:
36800
Retail name:
H5i cleanable tub
Retail name:
H5i humidifier chamber
Retail name:
H5i tub
Retail name:
H5i water tub

Sellers list any of these; they are the same part.

Will it fit your appliance?

Type your model number and we'll check it against the makers' lists.

Fits these 4 ResMed models

Only if your S9 has the H5i humidifier attached; the S9 runs without one.

Common questions
What does the 36800 fit?
The ResMed H5i water tub (S9) (part 36800) fits 4 ResMed models, including the S9 AutoSet, S9 Elite and S9 Escape. Every one is listed on this page.
Where can I buy the 36800 in Australia?
We track 4 Australian sellers for the 36800; the lowest listed price when we last checked was A$69.50 at CPAP Direct. Prices are re-checked daily and dated on this page.
How do I fit the 36800?
No tools, a few minutes: 4 steps, listed on this page with the replacement video where the maker has one.
What happens if I don't change it?
A cracked or leaking tub needs replacing; the manual says when to replace it otherwise.
Is there anything to reset afterwards?
No reset: the S9 has no tub-life counter.

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