Osmio HT+ · Replacement membrane
400 GPD reverse osmosis membrane for the Osmio HT+
Replace the stage 4 membrane in your Osmio HT+ direct-flow system. The same element fits the Home & Office and Lab & Dental models. It sits after the three pre-filters and reduces dissolved solids before the water reaches the final cartridge.
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400 GPD rating
The membrane’s nominal capacity.
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Stage 4 replacement
Fits the existing HT+ membrane housing.
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Two HT+ models
For Home & Office and Lab & Dental.
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Membrane only
Service the pre-filters separately.
Check your model
One membrane for both HT+ models
Look for Osmio HT+ on the unit label before ordering. Both versions share the stage 4 membrane. The difference is at stage 5, where Home & Office uses a remineralising cartridge and Lab & Dental uses a deionising resin cartridge.
Order the membrane and pre-filter pack separately when both are due for replacement.
- Filter type
- Direct-flow reverse osmosis membrane
- Membrane rating
- 400 GPD nominal
- Filter position
- Stage 4, after the three pre-filters
- Compatible systems
- Osmio HT+ Home & Office and HT+ Lab & Dental
- What you receive
- One replacement membrane element
Replacement and servicing
Plan the change and check the F2 indicator
Osmio lists 12–18 months in its filter schedule and 12–24 months in its maintenance instructions. Feed water and usage affect service life. Check the system sooner if the flow drops or the total dissolved solids (TDS) reading rises unexpectedly. Review the pre-filters and feed conditions as part of that check.
- Isolate the feed water and power, then open the drinking tap to relieve pressure.
- Follow the manual to remove the old element, seat the new membrane and refit the housing.
- Restore the supply, check for leaks and follow Osmio’s flushing instructions before using the water.
- Reset the membrane indicator (F2) according to the instructions for your controller.
Manufacturer instructions
Read the HT+ manual before servicing
See Osmio’s membrane fitting and filter-change sections for the housing, seals, flushing and controller instructions.
Helpful answers
Frequently asked questions
Will it fit both versions of the Osmio HT+?
Yes. The Home & Office and Lab & Dental direct-flow systems use the same 400 GPD membrane at stage 4. They use different final cartridges at stage 5.
Does this include the pre-filters or final cartridge?
This listing is for one RO membrane element. Order the pre-filters separately. Choose the final cartridge for your version of the HT+ if that stage also needs replacing.
How often should I replace the membrane?
Osmio’s filter schedule lists 12–18 months. Its maintenance section gives a broader 12–24 month window. Use the schedule for your unit and check performance if the flow drops or the product-water TDS rises.
What does the 400 GPD rating mean?
It is the nominal membrane rating. Osmio specifies around 60 litres per hour (about 1 litre per minute) for the complete HT+ system when the feed water meets its requirements.
Should I reset the controller after fitting it?
Yes. Follow the instructions for your controller. Osmio’s manual identifies F2 as the membrane indicator and F1 as the indicator for the other filters. Select F2 and use Clear after replacing the membrane.
Should I rinse the membrane before drinking the water?
Yes. Follow Osmio’s start-up and flushing instructions after fitting the membrane. Discard the flush water and check the housing and connections for leaks before returning the unit to use.
Friendly product support
Need help identifying your HT+ membrane?
Send Regal Flow a photo of the model label and your current filter setup. We can help you check which membrane, pre-filters and final cartridge fit your unit.