Domestic Water Pump Sizing

These features include the material of construction cast iron bronze stainless steel flow rate gpm or gallons per minute head loss in ft of head horsepower hp power supply v and connection type size flanged threaded sweat.

Domestic water pump sizing. Pressure required at the highest outlet. Domestic water pressure boosters will typically have one to four pumps. Getting the largest pump might not be the right solution if you have a small hot water system but one that is too small can cause a lot of problems in obtaining hot water from your system. A simplex system with just a single pump is sufficient to handle most small demands assuming redundancy isn t required.

Fitting a circulating pump to your hot water system is not complicated but you must know how to properly size the pump. Pump sizing does the hydraulic calculation for a centrifugal pump and estimates differential head hydraulic power motor power npsh available. Discharge static head is the height of water above the pump discharge. Sizing considerations for booster pump systems in buildings.

Other responsibilities include supporting and supplying the sales. Admittedly it s quite a few calculations to get to the definitive pump size and sizing programs are available to do most of the work. The water horsepower or minimum power required to run the pump equals where tdh is the total dynamic head in feet q is the flow rate in gpm and sg is the specific gravity 1 for water. Follow steps 1 2 and 3 to select the proper water pressure booster system.

Firstly we need to look at two important factors that being the pump flow rate needed the pressure required flow rate how much water will be required work out the number of taps or outlets inside and outside that are. Figure 7 suction discharge and total static head. Basic household pump selection guideselecting the most appropriate household pump model for your application is important as you want the right size pump to do the job. Still it s important to understand the logic that goes into a properly designed hot water recirculation system especially as system designs become more complex as we shall see in some up coming blogs.

The number of pumps specified for a given system will depend on the demand required gpm and whether or not the application requires any redundancy. Project criteria psi a. In this role larson oversees the design and fabrication of various metropolitan products such as domestic water booster systems primer pump stations housed booster stations and water wastewater treatment plants. Enter all the values you found into this formula to find the water horsepower for your project.

System sizing worksheet step 1 since municipal water pressure is often sufficient to handle the needs of many buildings first determine if a water pressure booster system is required.