# Water Pressure Loss through Piping

Written by Jerry Ratzlaff on . Posted in Fluid Dynamics

## Formulas that use Water Pressure Loss Through Piping

 $$\large{ p_l = \frac{ \mu \; l \; {v_w}^2 \; \rho \; SG }{ 24 \;d \; g } }$$ $$\large{ p_l = 4.53 \; l \; \frac{ \frac{ Q_w }{ C }^{1.852} }{ d^{4.857} } }$$

### Where:

$$\large{ p_l }$$ = water pressure loss

$$\large{ \rho }$$  (Greek symbol rho) = density of water

$$\large{ \mu }$$  (Greek symbol mu) = friction coefficient of water

$$\large{ g }$$ = gravitational acceleration

$$\large{ l }$$ = length of pipe

$$\large{ C }$$ = pipe coefficient

$$\large{ d }$$ = pipe inside diameter

$$\large{ SG }$$ = specific gravity of water

$$\large{ Q_w }$$ = water flow rate

$$\large{ v_w }$$ = water velocity