The average size of solid waste in residential systems is 1 or more. For commercial or industrial systems, the average size of solids is 2 or more. The total flow rate and dynamic head (TDH) is an integral part of the choice of a pump.

1 GPM 10 000 BTUhr, meaning that for 10 000 BTU of heat charge the circulator must produce a flow rate of 1 gallon per minute. Assuming that the system requires 100 000 BTUhr, a circulator pump must have a flow rate of at least 10 gallons per minute in a given pressure drop.

The average size of solid residues in household systems is 1 or higher. For commercial or industrial systems, the average size of solids is 2 or higher. The total flow and dynamic head (TDH) is an integral part of the selection of a pump.

1 GPM 10,000 BTUhr, which means that for every 10,000 BTU of heat charge the circulator must exit a flow of 1 gallon per minute. Assuming that the system requires 100,000 BTUhr, a circulator pump must have a minimum of 10 Gallons per minute flow at a certain pressure drop.

How to calculate septic tank capacity in Gallons. 3.14 x square radius x depth (all feet) cubic capacity. Cubic capacity x 7.5 gallons of capacity.