Recent content by watrax

what is the average demand in GPD per capita? thanks

so you're saying Gary Slusser that if i choose 20/40 pressures it will give me a bigger tank and if i choose 40/60 its will give me smaller tank

thanks for the link. DRAWDOWN (in Gals.) is the available water volums in the pressure tank regardless of its source (from well, cistern or storage tank). these drawdown will be divided by the drawdown factor to get the size of the pressure tank (in Gals). apparently drawdown depends on the...

what causes cavitation and what is its remedy?

what would be the type of pump to be used in lifting water up to the elevated water tank installed on the roof deck of a 5 storey building? the pump will draw water from a cistern tank about 8' in depth below the natural ground line...thanks

knowing the HP and GPM of pump and Elevation Head. my question is how to determine the discharge pressure at the pump?

ok. is the pump delivery rate in GPM mentioned the same as the demand in GPM at the house? let say the demand at the house requires 8GPM. should i also size my pump at 8GPM?

ok. when should a centrifugal be used?

i just learned that calculating a drawdown for pressure tanks is the poduct of pump delivery rate in GPM/LPM and pump running time? is there an ideal or minimum pump delivery rate for residential uses and what is also the ideal pump running time? im clueless..pls help. thanks

what is the difference in terms of function between jet pump (deep/shallow well) and Centrifugal pump? i have known that below 25' well a shallow well should be used and deep well for more than 25'. how far can a jet pump (deep and shallow) pushed water? for centrifugal pump, how depth can it...

where could i find Pump Performance Curve Chart? thanks

For HP=GPMxHead/(40%xEff.). i just want to clarify if the GPM indicated here is the desired water outflow(in GPM) at the faucets??

where can i find this pump flow chart/pump curve chart in the internet? thanks

i have read an article of gould.com regarding pump selection. there were three criterias stated in that article 1.) Capacity Needed - How big must the pump be? 2.) Well Condition - Deep Well or Shallow Well? 3.) Discharge Condition - How much pressure is needed. Granting these 3 conditions are...

i am connected to the city water main. i made an inquiry with the city water district on what pressure is available at their water main. they told me that during peak hours its only about 10psi and off-peak it could reach to 30psi. so obviously the 10psi pressure during peak hours its not...