Drawdown in wet wells when using self-cleaning strainers.
When using self-cleaning strainers on wet well inlets an additional
amount of drawdown will be incurred. While not detrimental in itself,
this variation should be considered when designing the wet well
and or when placing the various low level switches and indicators.
The following formula and chart may be used as approximate values
for this additional drawdown. Other factors, such as elevation and
barometric conditions will also effect this value.
