4" x 40" Brackish Water Reverse Osmosis Membrane, white wrapped element with label, angled view
4" x 40" Brackish Water Reverse Osmosis Membrane
Can you match this part’s SKU, size and connections to the system label or manual?
- Worth considering for
- Existing system owners who can match a part number and configuration before ordering.
From $354.81
Archived USD price · Check today’s price with Crystal Quest.
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A documentation-based review of the manufacturer’s listing and specifications. How we reviewed it
Our assessment
The 4" x 40" Brackish Water Reverse Osmosis Membrane belongs on a comparison list when its documented application matches your needs. The important next step is to verify the configuration and compatibility, rather than deciding from the product photograph alone.
What the listing gives you
- Configuration choices are documented
Quantity: Single, Pack of 2, Pack of 4
- Identifiable part numbers
BW-4040, BW-4040-2PK, BW-4040-4PK. These are useful for asking the manufacturer about an exact configuration.
What deserves a closer look
- Fit comes first
A similar photograph or product name does not establish compatibility. Confirm the exact part and its position in your system with Crystal Quest.
- Look beyond the listed price
Keep the original model number and replacement record. Check whether the listing describes one component, a multi-part kit or a complete system.
- Compare the same configuration
The source lists 3 configurations. Use the model and part-number table below so that a size, package or optional component is not mistaken for a different specification.
These are our reading of the published information and our buying considerations. They are not measured performance results.
The specifications, in context.
Values below are published by Crystal Quest. Specifications may describe different configurations; read the model labels and compare the complete source tables in the reference section.
The listing does not provide a separate two-column specification table. Available technical details remain in the full manufacturer reference below; confirm any missing measurements directly with Crystal Quest.
Multi-column comparison tables are preserved in full under Manufacturer reference.
Choose the configuration carefully.
A similar photograph or product name does not establish compatibility. Confirm the exact part and its position in your system with Crystal Quest.
Model & part-number reference 3 configurations
This is a reference table, not an ordering form. SKU and option names are reproduced from the manufacturer snapshot.
| Configuration | Part number / SKU | Listed price (USD) |
|---|---|---|
| Single | BW-4040 | $354.81 |
| Pack of 2 | BW-4040-2PK | $709.62 |
| Pack of 4 | BW-4040-4PK | $1,419.24 |
Price snapshot from November 8, 2026. This is not a current offer or a stock confirmation.
Think beyond day one.
Keep the original model number and replacement record. Check whether the listing describes one component, a multi-part kit or a complete system.
- Match the exact model or SKU before relying on an installation diagram or replacement schedule.
- Ask what the quoted package includes and what must be supplied separately.
- Keep the manufacturer’s operating instructions with your service and replacement records.
Frequently asked questions
Can you match this part’s SKU, size and connections to the system label or manual?Our reading
The 4" x 40" Brackish Water Reverse Osmosis Membrane belongs on a comparison list when its documented application matches your needs. The important next step is to verify the configuration and compatibility, rather than deciding from the product photograph alone.
Who is 4" x 40" Brackish Water Reverse Osmosis Membrane worth considering for?Best fit
Existing system owners who can match a part number and configuration before ordering.
What are the configuration constraints and installation requirements?Fit & plumbing
A similar photograph or product name does not establish compatibility. Confirm the exact part and its position in your system with Crystal Quest.
What are the ongoing maintenance and filter replacement considerations?Ownership costs
Keep the original model number and replacement record. Check whether the listing describes one component, a multi-part kit or a complete system.
Go back to the source.
The full product information below is supplied by Crystal Quest, including its own descriptions and claims. We have reorganized the typography and tables for reading. This material is separate from Elorova’s assessment.
Product overviewManufacturer material
Brackish water or briny water is water that has more salinity than freshwater, but not as much as seawater. It may result from the mixing of seawater with fresh water, as in estuaries, or it may occur in brackish fossil aquifers. The word comes from the Middle Dutch root "brak". Certain human activities can produce brackish water, in particular, civil engineering projects such as dikes and the flooding of coastal marshland to produce brackish water pools for freshwater prawn farming. Brackish water is also the primary waste product of the salinity gradient power process. Because brackish water is hostile to the growth of most terrestrial plant species, without appropriate management it is damaging to the environment.
A Reverse Osmosis (RO) system is a great solution if you are faced with multiple water issues or if you are trying to achieve the highest level of water purification for your home. This technology uses a semipermeable membrane to remove ions, molecules, and larger particles from drinking water.
Reverse osmosis (RO) is a water purification technology that uses a semipermeable membrane to remove larger particles from drinking water. In reverse osmosis, an applied pressure is used to overcome osmotic pressure, a colligative property, that is driven by chemical potential, a thermodynamic parameter.
Crystal Quest provides residential, commercial, industrial, and municipal reverse osmosis solutions for apartment complexes, dry cleaners, restaurants, food services, vending, health clubs, laundries, nursing homes, factories, schools, office complexes, car washes, resorts, manufacturers, breweries, hospitals, food processing, dairies, hotels & motels, condominium complexes, boiler pre-treatment, farms, distilleries, beauty salons, and many other businesses and industrial or government complexes.
Technical specificationsManufacturer material
Specifications for your selection
Single
- SKU
- BW-4040
- Diameter (width)
- 4.0 in
- Length (height)
- 40.0 in
- Replace every
- 2 to 3 years
What this review is based on.
Elorova researched the public Crystal Quest product listing, its published configuration data, source photographs and linked documents. The source page was checked on .
We have not purchased or installed this product, conducted a laboratory evaluation, or independently confirmed the manufacturer’s treatment and certification claims. We do not copy retailer star ratings into an Elorova rating.
Original Crystal Quest product listingOur research is a snapshot. Check the merchant’s current documentation, warranty, configuration, price and delivery terms before deciding. Read our editorial policy.
