Pressure drop across water filter

1. What is the pressure drop across a filter?
2. Does water filter decrease water pressure?
3. How do you calculate pressure drop across a strainer?

What is the pressure drop across a filter?

Pressure drop is defined by the National Air Filtration Association (NAFA): The pressure drop of a filter is a measure of its resistance to airflow through it. Resistance is measured in inches water gauge (w.g.) in the Inch-Pound system of measurement. It is measured in Pascals in the SI system.

Does water filter decrease water pressure?

When installed correctly and properly maintained by a professional, a whole house water filter shouldn't cause any serious problems with your water pressure.

How do you calculate pressure drop across a strainer?

The pressure loss across a strainer can be calculated using the system's flow rate and the Cv factor for that strainer. For example, a 1" Model 72 simplex strainer with a perforated basket has a Cv factor of 22.5. In water service with a 30 gpm flow rate, it will have a 1.7 psi pressure drop (30 ÷ 22.5)2 = 1.7.