WASSERMANN 4WDP5-55-12V

WASSERMANN RV Water Pump 12V DC

Model: 4WDP5-55-12V Instruction Manual

1. Introdución

This manual provides essential information for the safe and efficient installation, operation, and maintenance of your WASSERMANN 4WDP5-55-12V RV Water Pump. This self-priming diaphragm pump delivers a strong water flow of up to 5 gallons per minute (GPM) with a consistent 55 PSI pressure, making it suitable for RVs, campers, marine applications, yachts, and garden use.

The pump features a 12V DC motor, automatic pressure switch, corrosion-resistant construction, and safe dry-run capability for reliable performance.

2. Compoñentes incluídos

Your WASSERMANN RV Water Pump kit includes the following items:

  • 1x 12V RV Water Pump
  • 2x 1/2" Barbed Hose Adaptors
  • 1x 1/2" Male Thread Hose Adaptor
  • 1x Filter Out Debris (Strainer)
  • 1 x Manual de usuario
Included accessories for WASSERMANN 4WDP Series water pump, showing strainer filter, barbed straight pump fitting, and barbed 90-degree pump fitting.

Figure 1: Included accessories for the WASSERMANN 4WDP Series water pump.

3. Configuración e instalación

Ensure the pump is installed in a dry, well-ventilated area, protected from direct sunlight and freezing temperatures. Mount the pump securely to minimize vibration and noise.

3.1 Requisitos de enerxía

The pump operates on 12V DC power. It requires a nominal current of 5.5A and a maximum current of 15.8A. Ensure your power source (battery or vehicle's electrical system) can adequately supply these requirements to prevent the pump from running continuously without reaching full pressure.

WASSERMANN RV water pump connected to a 12V battery and a cigarette lighter adapter.

Figure 2: The pump can be connected to any standard 12-volt battery or directly into your vehicle's cigarette lighter socket (adapters not included).

3.2 Conexións de fontanería

The pump features a self-priming design, but it is recommended to ensure the inlet hose is filled with water before initial operation for faster priming. Use the provided 1/2" barbed hose adaptors and male thread hose adaptor for secure connections.

  1. Strainer Installation: Firmly tighten the included strainer to the pump's inlet connection. This filter prevents debris from entering the pump.
  2. Hose Adaptor Installation: Install the appropriate barbed hose adaptor to the threaded NPSM on the pump.
  3. Conexión da mangueira: Connect your water hoses to the barbed hose adaptors.
  4. Secure Clamps: Instalar clamps on all hose connections to prevent leaks.
Four-step visual guide for installing the WASSERMANN water pump, showing tightening the strainer, installing barbed hose adapter, connecting hose, and securing with a clamp.

Figure 3: Step-by-step installation of the pump and strainer.

WASSERMANN RV water pump connected to an inlet hose with a filter and an outlet hose, demonstrating water flow.

Figure 4: Proper connection of inlet (with filter) and outlet hoses.

4. Instrucións de funcionamento

The WASSERMANN RV Water Pump is designed for fully automatic operation.

4.1 Automatic Pressure Switch

The pump is equipped with a pressure switch that automatically starts the pump when a tap is opened and shuts it off when the tap is closed. This provides a convenient, hands-off water system.

4.2 Bypass Switch

The built-in bypass switch helps maintain stable water pressure and prevents the pump from constantly cycling (starting and stopping rapidly) when water flow is low. This ensures smoother operation and extends pump life.

Diagram showing the bypass switch on the WASSERMANN water pump and its function to maintain stable water pressure.

Figure 5: Location and function of the bypass switch.

4.3 Axuste da presión

The pump's shut-off pressure is factory-set to 55 PSI. If adjustment is needed:

  1. Unscrew the screws on the upper cover of the pressure switch.
  2. Use a pressure regulator needle to adjust the pressure.
  3. Turning clockwise increases the pressure, and turning counter-clockwise decreases it.
Three-step visual guide for adjusting the pressure switch on the WASSERMANN water pump.

Figure 6: Steps for adjusting the pump's pressure switch.

5. Mantemento

Un mantemento regular garante un rendemento óptimo e unha maior duración da súa bomba.

5.1 Strainer Cleaning

The pump is designed to pump clean water. If the liquid contains impurities, the 50-mesh stainless steel strainer at the inlet connection will help filter out debris. Periodically remove and clean the strainer to prevent blockages and maintain efficient water flow.

Explotou view of the 50 mesh stainless steel strainer, showing its components and how it connects to the pump.

Figure 7: Components of the 50-mesh stainless steel strainer.

5.2 Coidados xerais

  • The pump features corrosion-resistant construction for durability.
  • It has safe dry-run capability, meaning it can run without water for short periods without damage, but prolonged dry running should be avoided.
  • Ensure all connections remain tight to prevent leaks.

6 Solución de problemas

Se tes problemas coa bomba, consulta os seguintes problemas e solucións comúns:

  • Pump runs continuously but does not fully pressurize: This often indicates insufficient voltage ou amperage from the power source. Ensure your 12V DC supply can provide at least 5.5A (nominal) and up to 15.8A (max). Check battery charge and wiring.
  • Vibración ou ruído excesivos: The pump is designed to be quiet. If it vibrates excessively, ensure it is solidly mounted to a stable surface. Unsecured mounting can amplify operational sounds.
  • Inconsistent pressure or rapid cycling: Check for air in the system, leaks in the plumbing, or a clogged strainer. Refer to Section 4.3 for pressure switch adjustment if needed. The bypass switch should help mitigate rapid cycling.
  • Sen caudal de auga: Verify power supply, check for blockages in the inlet or outlet hoses, ensure the strainer is clean, and confirm the water source is available.

7. Especificacións

CaracterísticaEspecificación
MarcaWASERMANN
Número de modelo4WDP5-55-12V
Voltage12 voltios DC
Caudal máximo5 galóns por minuto (GPM)
Shut-Off Pressure55 PSI
Nominal Amps5.5A
Máximo Amps15.8A
Altura máxima de elevación125 pés
Dimensións do produto (L x W x H)9.03" x 4.92" x 4.33"
Peso do elemento6.1 libras
MaterialPlastic (Thermoplastic Construction)
Fonte de enerxíaEléctrico con cable
Usos específicosRV, Marine, Yacht, Lawn, Garden
Diagram showing the dimensions of the WASSERMANN 4WDP Series water pump and its various adapters.

Figure 8: Product dimensions and adapter types.

8. Garantía e soporte

The WASSERMANN RV Water Pump comes with a 3 ano de garantía. For warranty claims, technical assistance, or any product-related inquiries, please contact WASSERMANN customer support through the retailer where the product was purchased or visit the official WASSERMANN websitio para información de contacto.

© 2026 WASSERMANN. All rights reserved.

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