Watts
Watts-PG15L25 0-200 psi Pressure Gauge Liquid Filled Side Mount
$48.72
The Watts PG15L25 pressure gauge delivers accurate low-pressure monitoring from 0 to 200 psi with glycerin-filled dampening for stable readings in demanding filtration environments. Built with a 304 stainless steel body and brass internals, this side-mount gauge withstands the rigors of residential and light commercial reverse osmosis systems.
SPECIFICATIONS
Watts PG15L25 Technical Details
| Pressure Range | 0 to 200 psi |
| Case Diameter | 2.5 inches |
| Connection Type | 1/4 inch NPT, side entry mount |
| Body Material | 304 stainless steel |
| Internals | Brass connection and movement |
| Window | 372 plastic lens |
| Fill Type | Glycerin liquid filled for vibration dampening |
| Manufacturer | Watts Water Technologies |
INSTALLATION & USE
Mounting the PG15L25 Pressure Gauge
- Apply thread sealant tape to the 1/4 inch NPT male threads in a clockwise direction, wrapping 3 to 4 times without covering the first two threads.
- Thread the gauge into the side-mount port on your filtration system manifold or pressure vessel, turning clockwise until hand-tight.
- Use a wrench on the hex flats to tighten an additional 1 to 1.5 turns, ensuring the gauge face is oriented for easy reading.
- Pressurize the system slowly and verify the gauge responds smoothly without needle flutter or leakage at the connection point.
COMPATIBILITY
System Applications
The Watts PG15L25 is compatible with any water filtration system requiring 1/4 inch NPT side-mount pressure monitoring, including reverse osmosis systems, booster pumps, pressure tanks, and whole-house filtration manifolds. The 0 to 200 psi range makes this gauge ideal for monitoring feed pressure, permeate pressure, or tank pressure in residential and light commercial RO installations where precise low-pressure readings are critical for system diagnostics and maintenance.
🔧 Pro tip: Glycerin-filled gauges like the PG15L25 resist needle bounce from pump cycling, but extreme cold can thicken the glycerin and slow needle response. Install gauges in heated spaces when possible, and consider a 0 to 160 psi gauge if your normal operating pressure stays below 120 psi for better resolution in your working range.
