NMDP33-G30-50-12 - Water pump Vevor - Free user manual and instructions
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USER MANUAL NMDP33-G30-50-12 Vevor
Technical Support and E-Warranty Certificate
www.vevor.com/support
12 VOLT POTABLE WATER PUMP
MODEL: NMDP33-G18-60-12 /
NMDP33-G30-50-12 / NMDP33-G35-50-12
We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only rep estimate of savings you might benefit from buying certain tools with us compared top brands and does not necessarily mean to cover all categories of tools offer are kindly reminded to verify carefully when you are placing an order with us actually saving half in comparison with the top major brands.
MODEL: NMDP33-G18-60-12/NMDP33-G30-50-12/NMDP33-G35-50-12

natural_image
Technical line drawing of a mechanical device with threaded ports and housing (no text or symbols)NEED HELP? CONTACT US!
Have product questions? Need technical support? Please feel fr contact us:
Technical Support and E-Warranty Certificate www.vevor.com/support
This is the original instruction, please read all manual instruction carefully before operating. VEVOR reserves a clear interpretation user manual. The appearance of the product shall be subject to product you received. Please forgive us that we won't inform you there are any technology or software updates on our product.
![]() | Warning-To reduce the risk of injury, user must read instruct manual carefully. |
![]() | CORRECT DISPOSALThis product is subject to the provision of European Directive 2012/19/EU. The symbol showing a wheelie bin crossed through indicates that the product requires separate refuse collection in European Union. This applies to the product and all accesso marked with this symbol. Products marked as such may not discarded with normal domestic waste, but must be taken to acollection point for recycling electrical and electronic devices. |
An economical workhorse, the 33 Series is engineered for flexibility. The 3-chamber series is our Heavy-Duty water pump. It provides high-volume water flow with reduced pump cycling, thanks to the large three-chamber diaphragm. With on-demand switch. The 33 Series is available in three si 1.8GPM/60psi, 3.0GPM/50psi, and 3.5GPM/50psi, meet your special requirements with positive predictable performance. The 33 Series can reduce rapid cycling and allow water to flow back from the outlet side to the in of the pump. We also offer a variety of easy-connect fittings and filters.
PRODUCT SPECIFICATIONS
| Property | Specifications | ||
| NMDP33-G18-60-12 | NMDP33-G30-50-12 | NMDP33-G35-50-12 | |
| Rated Voltage | DC12V | DC12V | DC12V |
| Rated Pressure | 60 PSI | 50 PSI | 50 PSI |
| Number of Chamber | 3 PCS | 3 PCS | 3 PCS |
| Max. Flow | 1.8 GPM | 3.0 GPM | 3.5 GPM |
| Inlet/Outlet Diameter | 1/2" MNPT | 1/2" MNPT | 1/2" MNPT |
An incredible feature list, high-quality components, plus amazing performance. The three-chamber high-volume design, driven by a heavy-duty motor produces flow rates of 1.8GPM/3.0GPM/3.5 GPM, capable of self-priming u to 6 vertical feet, and can run dry, making it the price-to-performance leaf. This pump also offers a variety of easy-connect fittings and filters.
FEATURES
·3 -chamber diaphragm pump
·Continuous duty
- Industrial-standard mounting pattern
- Run dry capable for normal workloads
·Automatic: controlled by pressure switch
·Self priming
·Quiet Operation
·Ignition protected
APPLICATIONS
·Yacht/RV/caravan pressurized water system
- Sprayer fixtures (vehicle-mounted sprayers, electric sprayers)
·Cleaning machines Humidifiers water purification, medical apparatus
·Food beverage filling & liquid transfer
·Solar water system
·Any other pressurization system
INSTALLATION
Materials
1.diaphragm pump with related accessories
2.(at least) pieces of flexible, reinforced hose piping, with collapsing strength twice the inlet collapsing pressure(hose must be minimum 1/2"D)
3.stainless steel hose clamps and screws
4.screws to fasten the pump to the mounting surface
1 electrical cut off switch
1 fuse
1 screwdriver
1 strong cutting implement for tubing (if desired)Teflon tape or sealant
Setup
- The pump may be mounted in any position. If mounted vertically, the head should be in the down position to avoid leakage into the motor case the event of a malfunction.
- Secure the feet, but do not compress them. Over tightening the secure screws may reduce their ability to dissipate noise and vibration.
- The inlet and outlet hoses must be 1/2" (13 mm) ID reinforced hoses. diameter of branch and individual supply lines from the outlet should be smaller than 3/8"(10 mm).
- Plumb the system using high pressure (2 x pump rating), braided, flex tubing to minimize vibration/noise.
- Do not apply inlet pressure in excess of 30psi. In general, try to avoid inlet pressure completely.
- Avoid any kinks or fittings which could cause excessive restrictions.
7.Strainer should be attached to the inlet side. - The fittings must be secured to avoid leakage
- Use clamps at both ends of the hose to prevent air leaks into the wa
- If a check valve is installed in the plumbing, it must have a cracking pressure of no more than 2 psi.
- If applying a sealer or plumbing tape, be careful not to over tighten, may be sucked into.
- This pump should be wired on its own dedicated circuit. Connect the positive lead (red) to the positive terminal of your battery and the negative wire(black) to the negative terminal of your battery.
- In an easily accessible location, install a switch to control electricity to pump. Turn the pump off when not used for extended periods or when it is empty.
- The electrical circuit should be protected with an over-current protection
device(fuse) in the positive lead. This pump requires a 15 amp fuse.
- The pump circuit should not include any other electrical loads.
- As the water supply pump is non-essential, reference the wire Chart the electrical information. Be sure to have the correct wire sizing for the of wire you are using.
- After installation, check the voltage at the pump motor. Voltage should be checked when the pump is operating. Full voltage must be available at the pump motor at times.
Notes
- Flexible potable water hose or PEX tubing is recommended instead of piping at the pump. If you choose to use rigid piping, provide a short le hose between the pipe and the pump to avoid noise and vibration.
- We do not recommend the use of metal fittings. When possible, use provided plastic fittings.
- Do not adjust the bypass personally without the help of a technician.
- Lack of sanitizing and maintenance is one of the main reasons for the underperformance of the pump. Please do maintenance and winterize the pump at appropriate times, especially before and after a period of storage
ACCESSORIES
| Item | Quantity | ||
| NMDP33-G18-60-12 | NMDP33-G30-50-12 | NMDP33-G35-50-12 | |
| Manual | 1 | 1 | 1 |
| Hose Adapter | x | 2 | 2 |
| Filter | x | 1 | 1 |
| Hexagon Bolt | x | 1 | 1 |
| Sealing Tape | x | 1 | 1 |
EXPLODED VIEWS

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Exploded view diagram of a mechanical assembly with numbered parts for identification| KEY | Description | Quantity |
| A | Pump Head Assembly | 1 |
| B | Valve Assembly | 1 |
| C | Diaphragm Assembly | 1 |
| D | Motor Assembly | 1 |
| 1 | Pressure Switch | 1 |
| 2 | Diaphragm of Pressure Switc | 1 |
| 3 | Valve Core | 1 |
| 4 | Pump Head | 1 |
| 5 | Diaphragm | 1 |
| 6 | Rubber Foot | 1 |
| 7 | Motor | 1 |
PRODUCT SIZE

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1/2 NPT pipe thread Ø4mm(0.16in) Ø22mm 0.87in 210mm(8.27in) 73mm(2.87in) 18mm 0.71in 83mm(3.27in)
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139mm(5.47in) 124mm(4.88in)TROUBLESHOOTING
PULSATING FLOW- PUMP CYCLES ON AND OFF
- Check lines for kinks.
- Plumbing lines or fittings may be too small.
·Clean faucets and filters. - Check fitting tightness for air leaks.
FAILURE TO PRIME BUT MOTOR OPERATES-NO PUMP DISCHARGE
·Restricted intake or discharge line.
·Air leak in intake line.
·Punctured pump diaphragm
The initial amp supply is not enough to sufficiently start the motor.
- Debris clogs in the valves.
- Crack in the pump housing.
MOTOR FAILS TO TURN ON
- Loose or improper wiring.
- The pump circuit has no power.
- Blown fuse.
- Failed pressure switch.
- Defective motor.
PUMP FAILS TO TURN OFF AFTER ALL FIXTURES ARE CLO
- Punctured diaphragm.
- Discharge line leak.
- Defective pressure switch.
- Insufficient voltage.
• Clogged valves in the pump head.
LOW FLOW AND PRESSURE
· Air leak at the pump intake.
- Accumulation of debris inside pump or plumbing.
- Worn pump bearing (possibly accompanied by loud noise).
- Punctured diaphragm.
- Defective motor.
NOISY
- Check if the mounting feet are compressed too tightly.
- Is the mounting surface flexible? If so, it may be adding noise.
- Check for loose head/screws.
·If the pump is plumbed with rigid pipe, then it may transmit noise more
INSTALL THE PUMP AS THE PICTURE 1

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water tank pressure guage valve outlet
TIP: The range of pressure regulation is limited. Please operate under guidance of professional technicians, otherwise the machine may not work normally.
ADJUSTING THE PUMP'S SHUT-OFF PRESSURE:
Step 1: Remove pressure switch cover(No.1)
Step 2: Fine-tune the pressure adjustment screw (serial number 2) of pressure switch with a 2mm wrench, if you want to increase the pres it clockwise, if you want to decrease the pressure, turn it counterclock Step 3: Install the pressure switch cover (No.1)
picture 2

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screw of the pressure switch 2 pressure switch cover 1 clockwiseABOUT THE BYPASS
Please consult a professional technician in case the bypass needs adjustment. Improper adjustment of the bypass may damage the pump. The bypass comes preset for optimal operation of the pump. If your application calls for a different setting for the bypass, you may change yourself. Carefully tighten the screw to increase or loosen the screw decrease the minimum operating pressure of the bypass.
CAUTION
Please do follow the instruction manual to install the product. Any act outside what is recommended in this manual may bring damage to the pump.
*There are any minor changes to the numbers included in the user I without prior notice.
VEVOR®
TOUGH TOOLS, HALF PRICE
Technical Support and E-Warranty Certificate www.vevor.com/support
VEVOR®
TOUGH TOOLS, HALF PRICE
We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only rep estimate of savings you might benefit from buying certain tools with us compared top brands and does not necessarily mean to cover all categories of tools offer are kindly reminded to verify carefully when you are placing an order with us actually saving half in comparison with the top major brands.
MODÈLE: NMDP33-G18-60-12 / NMDP33-G30-50-12 /
NMDP33-G35-50-12

natural_image
Technical line drawing of a mechanical device with threaded ports and mounting base (no text or symbols)NEED HELP? CONTACT US!
Have product questions? Need technical support? Please feel fr contact us:
Technical Support and E-Warranty Certificate
www.vevor.com/support
This is the original instruction, please read all manual instruction carefully before operating. VEVOR reserves a clear interpretation user manual. The appearance of the product shall be subject to product you received. Please forgive us that we won't inform you there are any technology or software updates on our product.
PRODUCT SPECIFICATIONS
text_image
Exploded view diagram of a mechanical assembly with numbered parts for identificationtext_image
water tank pressure guage valve outlet
text_image
screw of the pressure switch 2 pressure switch cover 1 clockwiseABOUT THE BYPASS
www.vevor.com/support
12-VOLT-TRINKWASSERPUMPE
MODELL: NMDP33-G18-60-12 /
NMDP33-G30-50-12 / NMDP33-G35-50-12
We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only rep estimate of savings you might benefit from buying certain tools with us compared top brands and does not necessarily mean to cover all categories of tools offered are kindly reminded to verify carefully when you are placing an order with us actually saving half in comparison with the top major brands.
MODELL: NMDP33-G18-60-12 / NMDP33-G30-50-12 /
NMDP33-G35-50-12

natural_image
Technical line drawing of a mechanical device with threaded ports and mounting base (no text or symbols)NEED HELP? CONTACT US!
Have product questions? Need technical support? Please feel fr contact us:
Technical Support and E-Warranty Certificate
www.vevor.com/support
This is the original instruction, please read all manual instruction carefully before operating. VEVOR reserves a clear interpretation user manual. The appearance of the product shall be subject to product you received. Please forgive us that we won't inform you there are any technology or software updates on our product.
PRODUCT SPECIFICATIONS
text_image
Exploded view diagram of a mechanical assembly with numbered parts for identificationtext_image
water tank pressure guage valve outlet
text_image
screw of the pressure switch 2 pressure switch cover 1 IN OUTclockwise
ABOUT THE BYPASS
We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only represent of savings you might benefit from buying certain tools with us compared top brands and does not necessarily mean to cover all categories of tools offered are kindly reminded to verify carefully when you are placing an order with us actually saving half in comparison with the top major brands.
MODELLO: NMDP33-G18-60-12 / NMDP33-G30-50-12 /
NMDP33-G35-50-12

natural_image
Technical line drawing of a mechanical device with threaded ports and mounting base (no text or symbols)NEED HELP? CONTACT US!
Have product questions? Need technical support? Please feel fr contact us:
Technical Support and E-Warranty Certificate
www.vevor.com/support
This is the original instruction, please read all manual instruction carefully before operating. VEVOR reserves a clear interpretation user manual. The appearance of the product shall be subject to product you received. Please forgive us that we won't inform you there are any technology or software updates on our product.
PRODUCT SPECIFICATIONS
text_image
Exploded view diagram of a mechanical assembly with numbered parts for identificationtext_image
water tank pressure guage valve outlet
text_image
screw of the pressure switch 2 pressure switch cover 1 clockwiseABOUT THE BYPASS
We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only rep estimate of savings you might benefit from buying certain tools with us compared top brands and does not necessarily mean to cover all categories of tools offered are kindly reminded to verify carefully when you are placing an order with us actually saving half in comparison with the top major brands.
MODELO: NMDP33-G18-60-12 / NMDP33-G30-50-12 /
NMDP33-G35-50-12

natural_image
Technical line drawing of a mechanical device with threaded ports and mounting base (no text or symbols)NEED HELP? CONTACT US!
Have product questions? Need technical support? Please feel fr contact us:
Technical Support and E-Warranty Certificate
www.vevor.com/support
This is the original instruction, please read all manual instruction carefully before operating. VEVOR reserves a clear interpretation user manual. The appearance of the product shall be subject to product you received. Please forgive us that we won't inform you there are any technology or software updates on our product.
PRODUCT SPECIFICATIONS
text_image
Exploded view diagram of a mechanical assembly with numbered parts for identificationtext_image
water tank pressure guage valve outlet
text_image
screw of the pressure switch 2 pressure switch cover 1 IN OUTclockwise
ABOUT THE BYPASS
www.vevor.com/support
POMPA DO WODY PITNEJ 12 V
MODELE: NMDP33-G18-60-12 /
NMDP33-G30-50-12 / NMDP33-G35-50-12
We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only rep estimate of savings you might benefit from buying certain tools with us compared top brands and does not necessarily mean to cover all categories of tools offered are kindly reminded to verify carefully when you are placing an order with us actually saving half in comparison with the top major brands.
MODEL: NMDP33-G18-60-12 / NMDP33-G30-50-12 /
NMDP33-G35-50-12

natural_image
Technical line drawing of a mechanical device with threaded ports and mounting base (no text or symbols)NEED HELP? CONTACT US!
Have product questions? Need technical support? Please feel fr contact us:
Technical Support and E-Warranty Certificate
www.vevor.com/support
This is the original instruction, please read all manual instruction carefully before operating. VEVOR reserves a clear interpretation user manual. The appearance of the product shall be subject to product you received. Please forgive us that we won't inform you there are any technology or software updates on our product.
PRODUCT SPECIFICATIONS
text_image
Exploded view diagram of a mechanical assembly with numbered parts for identificationtext_image
water tank pressure guage valve outlet
text_image
screw of the pressure switch 2 pressure switch cover 1 clockwiseABOUT THE BYPASS
We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only rep estimate of savings you might benefit from buying certain tools with us compared top brands and does not necessarily mean to cover all categories of tools offer are kindly reminded to verify carefully when you are placing an order with us actually saving half in comparison with the top major brands.
MODEL: NMDP33-G18-60-12 / NMDP33-G30-50-12 /
NMDP33-G35-50-12

natural_image
Technical line drawing of a mechanical device with threaded ports and mounting base (no text or symbols)NEED HELP? CONTACT US!
Have product questions? Need technical support? Please feel fr contact us:
Technical Support and E-Warranty Certificate
www.vevor.com/support
This is the original instruction, please read all manual instruction carefully before operating. VEVOR reserves a clear interpretation user manual. The appearance of the product shall be subject to product you received. Please forgive us that we won't inform you there are any technology or software updates on our product.
PRODUCT SPECIFICATIONS
| Eigendom | Specificaties | ||
| NMDP33-G18-60-12 | NMDP33-G30-50-12 | NMDP33-G35-50-12 | |
| Nominale spanning | DC 12V | DC 12V | DC 12V |
| Nominale druk | 60 PSI | 50 PSI | 50 PSI |
| Aantal kamers | 3 STUKS | 3 STUKS | 3 STUKS |
| Maximale stroom | 1,8 GPM | 3,0 GPM | 3,5 GPM |
| Inlaat-/uitlaatdiameter | 1/2" MNPT | 1/2" MNPT | 1/2" MNPT |
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Exploded view diagram of a mechanical assembly with numbered parts for identificationPOMP GAAT NIET UIT NADAT ALLE ARMATUREN GESLOTEN ZIJN
text_image
water tank pressure guage valve outlet
text_image
screw of the pressure switch 2 pressure switch cover 1 OUT clockwiseABOUT THE BYPASS
www.vevor.com/support
12 VOLT DRICKSVATTENPUMP
MODELL: NMDP33-G18-60-12 /
NMDP33-G30-50-12 / NMDP33-G35-50-12
We continue to be committed to provide you tools with competitive price. "Save Half", "Half Price" or any other similar expressions used by us only rep estimate of savings you might benefit from buying certain tools with us compared top brands and does not necessarily mean to cover all categories of tools offered are kindly reminded to verify carefully when you are placing an order with us actually saving half in comparison with the top major brands.
MODELL: NMDP33-G18-60-12 / NMDP33-G30-50-12 /
NMDP33-G35-50-12

natural_image
Technical line drawing of a mechanical device with threaded ports and mounting base (no text or symbols)NEED HELP? CONTACT US!
Have product questions? Need technical support? Please feel fr contact us:
Technical Support and E-Warranty Certificate
www.vevor.com/support
This is the original instruction, please read all manual instruction carefully before operating. VEVOR reserves a clear interpretation user manual. The appearance of the product shall be subject to product you received. Please forgive us that we won't inform you there are any technology or software updates on our product.
PRODUCT SPECIFICATIONS
| Egendom | Specifikationer | ||
| NMDP33-G18-60-12 | NMDP33-G30-50-12 | NMDP33-G35-50-12 | |
| Märkspänning | DC 12V | DC 12V | DC 12V |
| Nominellt tryck | 60 PSI | 50 PSI | 50 PSI |
| Kammarens nummer | 3 st | 3 st | 3 st |
| Max. Flöde | 1,8 GPM | 3,0 GPM | 3,5 GPM |
| Inlopps-/utloppsdiameter | 1/2" MNPT | 1/2" MNPT | 1/2" MNPT |
text_image
Exploded view diagram of a mechanical assembly with numbered parts for identificationtext_image
water tank pressure guage valve outlet
text_image
screw of the pressure switch 2 pressure switch cover 1 OUT clockwiseABOUT THE BYPASS
www.vevor.com/support

