FAQ

FREQUENTLY ASKED QUESTIONS CONCERNING
Jet Pumps
Q1. Why is the jet pump not building pressure?
A1. The jet pump is not building pressure due to a few dierent reasons, there is a leak in the suction line, the incorrect size
venturi tube is installed or the venturi tube is installed incorrectly.
Q2. Why is the pump producing a low volume of water?
A2. The jet pump is producing a low volume of water because of one or more of the following reasons:
 • Thepumpisnotprimedcorrectly,pleasereprimepumpandtryagain.     
 • Thesuctionliftistoohighortoolong,movethepumpclosertothewatersource,theliftforashallowwell 
application should be no more then 25 foot and 70 foot for deep wells.
 • Thereisaholeorleakinthesuctionline,reviewsuctionlineandrepairorreplacewherenecessary.  
 • Thefootvalveorsuctionlineisnotsubmergeddeepenoughintothewater.    
 • Thefootvalveistoosmall,replacefootvalveandmatchthevalvesizingtothesizeofthepipeorlarger. 
 • Thevoltageconversionswitchisincorrect,conrmyourvoltageandbesurethattheconversionswitch 
correlates.
 • Thecastinggasketisleaking,pleasereplace.     
Q3. Why is the pump short cycling?
A3. The jet pump could be short cycling because of the following:
 • Leakinthetank     
 • Badairvolumecontrol     
 • Thepressureswitchinstalledinfaulty     
 • Thereisaleakonthedischargesideofthetank    
 • Thereisaleakinthesuctionpipe     
 • Acheckvalveand/orfootvalveinstalledinthesystemisleaking     
 • Thepressuretankcouldbewaterlogged     
 • Thejetpumpisfurthurthen4’fromthepressuretank     
 • Therearehighfrictionlossvalvesbetweenpumpandtank
Q4. Why is the pump tripping on thermal overload?
A4. One of the following reasons could be why the jet pump is thermal overloading:
 • Thewrongvoltageisconnectedtothejetpump     
 • Thejetpumphasbeenwiredincorrectly     
 • Thereisnotenoughventilationforthejetpump     
 • Theincorrectelectricalwiresizeisbeingused
Q5. How do I wire this jet pump?
A5. The wires from your power source will need to be attached to the pressure switch and then wires between the pressure
switch and the motor must be connected, ensure the wires are connected to the motor for the proper electrical source
voltage, i.e. 115V or 230V. Also, please be sure the conversion switch reads the corresponding voltage.
Q6. What wire size do I need for this pump?
A6. The wire size we recommend will depend on the voltage you are running and also the distance from the pump to the
electrical source, please refer to the graph below.