ERO 335 EcoWater Replacement Filters & Membranes
Your ERO-335 isn’t obsolete. USA-made compatible filters keep it running like new.
1 Set includes a Pre & Post Filter.
Recommended Replacement: 6-12 months
Manufactured in the USA with materials that meet or exceed the original specifications.
Want to have this AUTO-SHIPPED once a year? CLICK HERE
ERO-335 Membrane. Replace every 36 months. Inspect filters prior to installation. Compatible with a new label design and slightly larger in girth. Higher Capacity than the original
Your System Still Works. You Just Need ERO 335 EcoWater Replacement Filters
EcoWater discontinued the ERO-335 in favor of the 385 series, but that doesn’t mean your system stopped working. The 335 still reduces up to 95% of total dissolved solids and removes contaminants like lead, fluoride, and chlorine taste just as effectively as the day it was installed.
What’s changed is the supply chain for parts, as OEM EcoWater RO filters for this model are increasingly hard to source. Some dealers will tell you the only option is to purchase an entirely new system online. Others will sell you the remaining stock at inflated prices.
Neither is necessary. ERO-335 EcoWater compatible filters are manufactured specifically to keep this system running at full capacity, at a fraction of the OEM cost.
ERO 335 Replacement Filters Fit Snuggly and Cost Less
The compatible ERO 335 replacement filters at Wholesale Filters Direct are USA-made and built to match or exceed original specs. They replace OEM part numbers 7208683 (pre-filter), 7208691 (post-filter), and 7208706 (membrane), and they lock into the same proprietary twist-lock housing without any modification.
The compatible reverse osmosis membrane actually offers a slight upgrade, with a larger girth and higher capacity than the original. Same contaminant reduction, same TDS rejection, same quarter-turn installation that takes less than five minutes.
The difference? You’re paying wholesale water filter prices instead of scarcity pricing on discontinued stock.
Schedule That Keeps Your ERO-335 at Peak Performance
Our AutoShip option takes worrying about filters off your plate. Set a delivery interval and compatible filters show up before they’re due. No tracking dates, no scrambling to find stock for a discontinued model.
Pre-filter and post-filter every 6 to 12 months.
RO membrane every 36 months.
Bottled Water Quality From Your Own Faucet
A well-maintained ERO-335 delivers drinking water that rivals bottled water, straight from the faucet. Lead, arsenic, nitrates, cysts like Giardia and Cryptosporidium, chlorine taste, dissolved solids, all removed through a reliable water purification process that still performs as well as the day it was installed.
Fresh filters also mean consistent water flow. No slow trickle, no pressure drops, no guessing whether the system is still doing its job. The ERO-335 was built to last. Compatible filters from Wholesale Filters Direct make sure it does.
Frequently Asked Questions
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Sediment that the pre-filter would normally catch starts reaching the reverse osmosis membrane, accelerating wear on the most expensive part of the system. The membrane gradually loses its rejection rate, letting more dissolved solids through into your drinking water. Staying on schedule costs a fraction of what an early membrane replacement would run you.
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Not if your ERO-335 is still functioning. Compatible filters keep the system running at full capacity. The only reason to upgrade is if you want the 385’s higher production rate or expanded contaminant list, including PFOA/PFOS and VOC reduction.
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No. Close the water supply valve and the tank shutoff, relieve pressure at the faucet, then give the filter a quarter-turn to the left and pull. Check the O-ring seals before installing new filters, and you’re done. No wrenches or special equipment required.
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Our filter sets include both the pre-filter and post-filter together. Replacing both at the same time ensures balanced performance and prevents one exhausted filter from overloading the other.
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Yes. Our compatible filters fit the ERO-335, ERO-R335E, and ERO-R355 models.