
Watts-PG15L25 0-200 psi Pressure Gauge Liquid Filled Side Mount
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 |
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.
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.
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 |
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.
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.
Original: $48.72
-65%$48.72
$17.05Description
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 |
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.
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.










