
OPERATING INSTRUCTIONS:
1. Prime the Pump.
A. From a Pressurized Supply
•Connectagardenhosetothegardenhosetting,
makingsuretheattachmentissnug.
•Attachthehighpressurehosetothequickconnecton
thepump.
•Withoutplugginginorturningonthepump,turnonthe
supplyofwaterandopentheoutletvalve.
•Oncewaterbeginstoowoutofthehigh-pressurehose
andtheairispurgedout,closetheoutletvalve.
B. From a Non-Pressurized Supply
•Connectagardenhosetothegardenhosetting,making
suretheattachmentissnug.
•Makesurethehoseendisnotrestingonthebottomor
sideofthesupplycontainer.Thiswillnotallowwaterto
ow,causingprimingandsuctionproblemswith
thepump.
•Primingthepumpiseasierifitisatequalorlowerheight
ofthesupplycontainer.
•Attachthehighpressurehosetothequickconnecton
thepump.
•Pluginthecordandturnonthepumpwiththeairbleed
off(primingvalve)open.Waterwillowfromthisvalve
oncethepumpbeginstoprime.Note: A hose can be
attached to the hose barb and run back to the water
supply if desired.
•Closetheairbleed-offvalveandthepumpwillquickly
prime.Makesuretheoutletvalveisopen.
•Oncewaterbeginstoowoutofthehigh-pressurehose
andtheairispurgedout,closetheoutletvalveandturn
offthepump.
Priming Tips:
A. Whenprimingthepumpfromanon-pressurizedsupply,
itisrecommendedtolltheinputgardenhosebefore
turningonthepump.
B. Theinputttingforthepumpisastandardgardenhose
connection.Whenthisattachmentismadeitisimportant
tomakesurethegardenhoseistightenedsnugglysothat
thepumpdoesnotsuckairthroughthelooseconnection.
Alooseconnectionwillmakethepumphardtoprime.
C. Theshorterthegardenhose,theeasieritistoprimethe
pump.Longhosestendtocollapsefromthesuctionofthe
pumpwhendrawingfromanon-pressurizedsystem,
restrictingow.
D. Useahosethatisrigidenoughsothatitdoesnotcollapse,
especiallywhendrawingwaterfromanon-pressurized
system.
2. Connect the High Pressure Hose to the system being
checked.
A. Ifthesupplywateriscomingfromapressurizedsystem,
itisrecommendedtollthesystemtobetestedwithwater
priortoturningonthepump.Thiscanbedonesimplyby
openingtheoutletvalveonthepump,allowingwaterto
owthroughthepumpandhigh-pressurehoseintothe
systembeingtested.Oncethesystemllsandpressure
beginstorise,proceedtothenextstep.
B. Non-pressurizedsystemsshouldbelledwithwaterpriorto
attachingthehigh-pressurehoseandturningonthepump,
ifatallpossible.Thiscouldspeedupthetestingprocess.
C. Theoutputttingattheendofthehigh-pressurehoseis
3/8”NPT.Anadaptormaybeusedtoattachthishoseto
thesystemthatisbeingpressuretested.
3. Setting the pressure.
A. Pluginthecordandturnonthepump(EHTP500)or
attach½”electricorcordlessdrilltoshaftonbackof
pump(DPHTP500).DPHTP500pumpcanbedrivenin
eithertheclockwiseorcounterclockwisedirection.
B. Runthepumpforafewsecondstobesureitis
pumpinguidintothesystem.Closethehighpressure
outletvalve.Pressurecanbeadjustedbyturningthe
pressureadjustmentknobonthesideofthepump.Turning
clockwisewillincreasethepressure.Turningcounterclock-
wisewilldecreasethepressure.
C. Whenthedesiredpressureindicatedonthepumpgauge
isreached,openhighpressureoutletvalveandrunthe
pumptopressurizethesystem.
4. Once the system reaches the desired pressure, close the
high pressure outlet valve and turn off the pump.
The gauge on the pump indicates the pump pressure and not
the test system pressure. A separate gauge for the test system is
required, and is not provided with these test pumps.
A. Oncethepumpreachesthesetpressure,itwillcontinue
torunbutthewaterwillowthroughtheAutomatic
Bypassandrecirculatethroughthepump.Itisnot
recommendedtorunthepumpinbypassmodeformore
thanacoupleofminutes.Oncethedesiredpressureis
reached,itisunnecessarytocontinuerunningthepump.
Closethevalve,turnoffthepumpandunplugthecord.
B. Thepumpisequippedwithavalveandhosewhichhas
acheckvalvetopreventbackow.Thecheckvalveonly
workswhenthethehoseisdetachedfromthepump.It
isrecommendedtollthesystembeingtestedthrougha
valvewhichcanbeshutforbackowpreventionaswell.
POWER HYDROSTATIC TEST PUMP OPERATING INSTRUCTIONS
2
Item Description
1. PressureAdjustmentKnob
2. PressureGauge
3. GardenHoseFittingwithScreen
4. AirBleed-OfforPrimingValve
5. OutletHoseQuick-ConnectionandOutletValve
6. FrontCoverPlate
7. On/OffSwitch
8. AutomaticBypass
5. The system is now isolated.
A. Thehosecanquickdisconnectfromthepumpandremain
withthesystembeingtested,ifnecessary,sothatthe
pumpcanbeusedtotestanothersystemorstored.
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