| Measures: | Pressure Fahrenheit Celsius |
|---|---|
| Dial Size: | 2-1/2" |
| Min Temp (F): | 30°F |
| Max Temp (F): | 250°F |
| Max Temp (C): | 120°C |
| Min Temp (C): | 0°C |
| Max Pressure (PSI): | 75 |
| PSI Range: | 0-75 |
| Mount: | Back |
| Connection Type: | 1/4" NPT |
| Type: | Dry |
| Length: | 3-3/8" |
| Accuracy: | +/- 2% |
I notice my manifold Gauge is diff than my temp/pressure gauge. Manifold gauge shows 10 deg. higher. No problem with black pipe and brass together.
The problems associated with dissimilar metals you referred to is called the di-electric effect. Brass is actually "di-electric" in that when used between black pipe and copper, it eliminates the reaction that takes place between them. That's unrelated to the problems you are experiencing. Simply put, if your gauge is in the system and not isolated by a valve then it should be reading system pressure. Otherwise it sounds like a defective gauge.
No, it is not. If the tridicator is not isolated with a shutoff valve, you would need to drain the system before you change it.
The accurate temperature range for this product is 70°F - 250°F.