O-rings For Water Filter Housings and Canisters

155121, 34202027, 151120, 34002028, 151122, 34202029, S3069, 34201026, 7170246

Replacement Filters Reverse Osmosis RO Membranes, Pumps, Testing Supplies

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Water Filter Systems O-Rings
151121 SL #237 Buna-N Replacement O-Ring for #5 & Slim Line Sumps. PURA/Hydrotech 34202027, EcoWater/Northstar 7170246.

151121 SL #237 Buna-N Replacement O-Ring for #5 & Slim Line Sumps. PURA/Hydrotech 34202027, EcoWater/Northstar 7170246.

O-RING for 10" & 20 Ametek/Plymouth SLIMLINE. Model: SLIMLINE HOUSINGS. Alternate Part number# A58004, 34202027, OR-38, 152031, W38-0R, 151121-66

For Ametek/Plymouth SLIM LINE 10" & 20" Filter Housing (1/4 - 1/2" cap, 6 ribs)
Buna-N FDA Grade 3 1/2" Diameter


151120 - 4" Diameter O-RING #241 for 10" Ametek/Plymouth STANDARD. PURA/Hydrotech 34002028 

151120 - 4" Diameter O-RING #241 for 10" Ametek/Plymouth STANDARD. PURA/Hydrotech 34002028
Model: Standard

(3/4 cap, 4 sets of 5 ribs) and 20" Filter housing (3/4 cap, 6 ribs). Alternate Part number# A51021, 34202028, OR-34, 152030, 151120-66

O-Ring For Standard Size Water Filter Housing Buna-N FDA Grade 4" Diameter


151122 BB Buna-N Replacement O-Ring for BB Sumps. PURA/Hydrotech 34202029

151122 BB Buna-N Replacement O-Ring for BB Sumps. PURA/Hydrotech 34202029
O-RING For 10" & 20" BIG BLUE. Model: Big Blue Housings. (Ametek, Plymouth, American Plumber) Part number# 151122. Alternate Part number# OR-100, 152032, W10-OR, 151122-66

O-Ring For Big Blue Water Filter Housing Buna-N FDA Grade 5 3/4" Diameter


Microline Filter Housing O-Ring S3069.

Microline 1-Piece Filter Sump O-Ring S3069
Microline Filter Housing O-Ring S3069.
This O-Ring Fits One Piece Filter Housings Only

Hydrotech Filter Sump O-Ring 34201026

Hydrotech Filter Sump O-Ring 34201026 

Holding Tank Air Pressure Gauge
Reverse Osmosis Hiolding Tank Pressure Gauge

The number one reason for low water flow from a reverse osmosis system is low air pressure in the holding tank.

With this holding tank air pressure gauge you can easily check and maintain the holding tank air pressure to the required 8 PSI of air pressure to get your system up and running at its' peak efficiency.

Specially designed for use with low air pressure applications, this Holding Tank Air Pressure Gauge is a must for Reverse Osmosis Systems maintenance. 


TDS Meter
TDS-EZ Total Dissolved Solids TDS Meter

HM Digital, Inc., TDS-EZ Total Dissolved Solids Meter

The HM Digital EZ TDS meter is a must for reverse osmosis (RO) filter and membrane monitoring. Know when to change your pre-RO filters to extend the life of the RO membrane. Designed for home use, this pocket TDS meter comes with a 2 year limited manufacturer's warranty.Designed for the long haul, this compact TDS (Total Dissolved Solids) meter has been manufactured with a tough housing and large, easy to read LCD screen. It sports a measurment range of 0 to 9990 parts-per-million. Flip it over and the back side sports a handy color coded chart which classifies the water you are testing.The TDS-EZ is perfect for monitoring your reverse osmosis (RO) output water. Take the guess-work out of knowing when to change your filters! 



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*The replacement filters and membranes advertised on this site are not manufactured by the companies that manufacture the underlying water treatment equipment unless so noted.  Our use of registered trademarks, such as Culligan®, Kiss®, Premier Manufactured Systems® and others, is only for purposes of identifying compatible replacement filters and membranes, and does not suggest any association, sponsorship or endorsement of our our products by the manufacturers of the underlying equipment. "COMPATIBLE" Legal Disclaimer
Purewater4u.com is a trademark of Purewater 4U of Las Vegas, Inc. All other products mentioned are registered trademarks or trademarks of their respective companies. Proprietary contents contained herein are the sole property of Purewater4u.com and Purewater 4U of Las Vegas, Inc. and may not be reprinted, reproduced or transmitted in any form without written permission. Purewater 4U of Las Vegas, Inc., grants permission to electronically copy and to print hard copy portions of this site for the sole purpose of placing an order with or through Purewater4u.com, or using this site as a shopping resource. Any other use of materials on this site, including reproduction for purposes other than those noted above, modification, distribution, or republication, without prior written permission from Purewater 4U of Las Vegas, Inc. is strictly prohibited. Copyright © 1998 - 2018 Purewater 4U of Las Vegas, Inc. Las Vegas, NV, USA. All rights reserved.