pH Test Kits  wstop
Replacement Filters Reverse Osmosis RO Membranes, Pumps, Testing Supplies

We Ship To United States and Territories Only.

Shop By Category
Home Page
Search Our Site
Replacement Water Filters
Reverse Osmosis Systems
Reverse Osmosis Membranes
Components & Fittings
Reverse Osmosis RO Holding Tanks
Installation Supplies
Reverse Osmosis Accessories
UV Systems & Lamps
Water Testing Supplies
Contact Us
Sales & Return Policy
Instructional Videos
Reverse Osmosis Troubleshooting Guide
RO Membrane Identification and How To Upgrade
Filter Change Instructions
Manuals & Downloads
Read What Our Customers Have To Say About!
We Accept:
American Express Card
Visa Card


pH Test Kits
Please Note
Most testing supplies have a shelf life. In order to guarantee the freshness of these supplies we only inventory a minimum amount of these products. Due to fluctuations in orders, we cannot guarantee any product will be in stock and it could take 3-4 weeks for us to ship any test supplies to you.
Extended Range pH Check

No matter what your application, WaterWorks pH Check is the convenient measurement tool for accurate, rapid pH detection in tap water, process water and control, ponds, lakes, and streams.
Utilizing a dual-pad indicator system is what makes this pH test unique. Both indicators are designed to work in unison, providing a wide range of color development. Additionally, the dual-indiacator system makes color matching easier and more reliable since both colors are uniquely different from each other. With its wide range of detection, low cost per test, and safe chemistry, Water Works pH Check is the ideal choice for fast, accurate pH detection you can trust. 

Kit #:  Detection Level: Test Time: # of Tests Order Yours Today!
481104 2, 3, 5, 6, 6.5, 7, 7.5, 8, 8.5, 9, 9.5, 10, 11, 12
30 Seconds
Bottle of 50
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! 


View/Modify Shopping Cart!
[an error occurred while processing this directive]