The Good Water Purcheck-1-3-8 is an inline TDS monitor designed to verify reverse osmosis system performance in real time. This unit integrates directly into 3/8" tubing using John Guest quick-connect fittings, making it simple to add water quality monitoring to any RO installation.
SPECIFICATIONS
Technical Details
| Model Number | Purcheck-1-3-8 |
| Manufacturer | Good Water Warehouse |
| Connection Type | 3/8" John Guest (JG) tee fitting |
| Application | Reverse osmosis system monitoring |
| Measurement | TDS (Total Dissolved Solids) |
| Installation Position | Product water line |
| Display | Inline meter with digital readout |
| Housing Material | Food-grade polypropylene |
INSTALLATION & USE
Setup Instructions
- Shut off water supply and depressurize your RO system completely
- Cut the 3/8" product water line between the membrane housing and storage tank where you want monitoring access
- Insert the Purcheck tee fitting into the tubing, ensuring both John Guest connections seat fully with an audible click
- Restore water supply and check for leaks, then activate the monitor to begin tracking TDS levels
COMPATIBILITY
System Requirements
The Purcheck-1-3-8 is compatible with any reverse osmosis system using 3/8" OD tubing and John Guest quick-connect fittings. It works with residential under-sink RO units, commercial systems, and aquarium filtration setups where real-time TDS monitoring is required. The inline design fits neatly in standard under-sink installations without requiring additional mounting hardware.
🔧 Install the Purcheck monitor on the product water line before the storage tank to get the most accurate reading of your membrane's rejection rate, since tank water can pick up TDS from the bladder over time.
