Skip to product information
  • Sku: RO-M-CTA

CTA Membrane ONLY for Three-Stage Reverse Osmosis Systems (RU300C18 models)

$119 USD
 per 

Made in the USA

Meets or exceeds NSF, ANSI, California State, and FDA standards and compliances

Enjoy delicious, perfectly filtered water

SAVE $500+ EVERY YEAR
Stop buying bottled water or low quality, frequent filter replacements

In stock!
Rendering loop-subscriptions

Product Features

Made in the USA
BPA-free, phthalate-free, and recyclable filter housings
Meets or exceeds the highest standards and compliances: NSF, ANSI, California State, and FDA
Replace your filter up to once per year

Product Description

FREE Shipping! CTA Membrane for EWS Three-Stage Reverse Osmosis Systems Are You Looking for the Complete RU300C18 Filter Kit? Click Here. Item No.: RO-M-CTA Description: CTA membrane Replacement Schedule: Up to 1 year, not to exceed 1 year Special Note: EWS uses full-size, full bed depth, medical-grade filters for optimum performance and longer life   Handmade in the USA from USA-Made Parts

Shipping Details

Free Shipping Every Day

We always ship free to all 48 contiguous United States. No minimum order requirements. No coupon codes. Just free shipping every day.

Processing Time

Most orders leave the factory facility within 3-5 business days. Larger whole home appliances (like the Spectrum, salt softeners, 1465, etc.) and specialty products (like iron removal, pH systems, etc.) can take up to 10 business days to process. Each product is machined by hand and individually checked for quality, so we cannot guarantee a faster turnaround time (though it does happen).

Shipping Time – Contiguous 48 States

All filter replacements and smaller appliances like drinking water systems, reverse osmosis systems, Heater Guards, and single stage filtration systems ship standard via common carrier (FedEx, USPS, or UPS). These carriers typically deliver within 3-7 business days, depending on your location.

All media replacements and larger tank appliances like the EWS Spectrum, CWL Spectrum, 1465, 1865, salt softeners, pH systems, etc. ship via freight truck. Freight trucking typically delivers within 3-10 business days depending on your location.

Shipping Info – Alaska & Hawaii

Alaska and Hawaii are charged shipping. We don't have any handling fees. Shipping is simply a pass-through cost directly from FedEx or UPS. Please also note that shipping rates are weight-based. The weight of any item can be found on its product page. All weights are rounded up to the next full pound to comply with UPS shipping policy. Please see above for rough estimates on processing and shipping times.

International Orders

International orders incur shipping charges. Before placing any international orders, please contact us so we can ensure that you will be receiving the proper outlets and fittings to suit your home or facility. You may prefer to ship to a USA-based freight forwarder, since we will ship free to your USA freight forwarder (contiguous 48 states only). The freight forwarder would then bill you for shipment to your international address. Please refer to them for their shipping timeframes. If we ship directly to your international address, please be aware that shipping times can increase because of customs or shipping provider delays, which are both outside our control.

View full details

CTA Membrane ONLY for Three-Stage Reverse Osmosis Systems (RU300C18 models)

$119 USD
 per 
FILTER REPLACEMENT INFO

How to change your sink filters.

Click below to be directed to the manufacturer's website. Visit their Resources > Service Manuals section and download the service manual PDF instructions for your sink filtration system.