1. Product Overview
The WASSERMANN 3WDP4-55-115V is a high-performance self-priming diaphragm water pressure pump designed for various applications. It delivers a flow rate of 4.0 gallons per minute (GPM) with a pressure switch set to 55 PSI. This 115V AC pump is suitable for use in kitchens, bathrooms, marine environments, RVs, and gardens, providing consistent water pressure wherever needed.
Key features include an automatic pressure control switch, a durable pure copper motor, and anti-vibration mounting for quiet operation. The pump is equipped with a 3.5-foot power cord and 1/2-inch outlet diameter for versatile installation.
Image 1.1: WASSERMANN 3WDP4-55-115V Water Pressure Pump with key specifications. Shows voltage (115V AC), amps (0.9A), flow (4 GPM), max suction (10 FT), PSI (55 PSI), max lift (98 FT), and hose adapter details.
2. Safety Information
- Always disconnect power before performing any maintenance or installation.
- Ensure the pump is installed in a dry, well-ventilated area, protected from freezing temperatures.
- Do not pump flammable liquids such as gasoline, kerosene, or ethanol. This pump is designed for water only.
- Verify that the power supply voltage matches the pump's requirements (115V AC).
- Use appropriate plumbing connections and sealants to prevent leaks.
- The pump is equipped with thermal protection to prevent motor overheating. If the pump stops unexpectedly, allow it to cool before restarting.
Image 2.1: Illustration showing various liquids suitable for the pump (fresh water, drinking water, low salinity liquid, weakly acidic liquid) and a warning against pumping flammable liquids.
3. Installation and Setup
3.1 Unpacking and Inspection
Carefully remove the pump and all accessories from the packaging. Inspect for any signs of damage during transit. Ensure all components listed in the packing list are present.
3.2 Mounting the Pump
Mount the pump on a stable, flat surface using the integrated mounting bracket. The pump features anti-vibration rubber feet to reduce noise and vibration during operation.
Image 3.1: Close-up of the pump's stable rubber feet, designed to minimize vibration on hard surfaces and reduce operational noise.
3.3 Plumbing Connections
- Install the Strainer: Firmly tighten the 50-mesh stainless steel strainer to the inlet connection of the pump. This prevents debris from entering and damaging the pump.
- Connect Hose Adapters: Install the provided barbed hose adapters to the threaded NPSM ports on the pump.
- Attach Hoses: Securely attach your water supply hose to the inlet adapter and your output hose to the outlet adapter. Ensure all connections are tight to prevent leaks.
Image 3.2: Step-by-step guide for plumbing connections: 1. Tighten the strainer. 2. Install barbed hose adapters. 3. Attach hoses to adapters.
Image 3.3: Diagram showing the 50-mesh stainless steel strainer, which can be removed for cleaning and helps filter out debris from the water supply.
3.4 Electrical Connection
Plug the 3.5-foot power cord into a standard 115V AC wall socket. Ensure the outlet is properly grounded.
4. Operating Instructions
The WASSERMANN water pressure pump features an automatic pressure switch for convenient operation.
- Power On: Once installed and connected, plug in the pump.
- Automatic Operation: The pump will automatically activate when a tap or water outlet is opened, supplying water. It will stop when the tap is closed, maintaining stable water pressure and conserving energy.
Image 4.1: Diagram illustrating the on-demand pressure switch, which automatically starts the pump when water flow is detected and stops it when the flow ceases.
4.1 Adjusting Pressure (If Necessary)
The factory default pressure setting is 55 PSI. If adjustment is required:
- Locate the red rubber sleeve in the center of the pressure switch and open it.
- Use a pressure regulator needle (or small screwdriver) to adjust the pressure. Turning clockwise increases pressure, and turning counter-clockwise decreases pressure.
Image 4.2: Visual guide for adjusting the pump's pressure switch. Shows locating the red rubber sleeve and using a tool to turn the adjustment screw.
5. Maintenance
5.1 Strainer Cleaning
Regularly inspect and clean the 50-mesh stainless steel strainer located at the pump's inlet. A clogged strainer can reduce pump performance and lead to damage.
- Disconnect power to the pump.
- Unscrew the strainer housing.
- Remove the mesh filter and rinse it thoroughly under clean water.
- Reassemble the strainer, ensuring a tight seal.
5.2 Winterization (for outdoor/RV use)
If the pump is used in an environment where freezing temperatures are possible, it must be drained and winterized to prevent damage.
- Disconnect power.
- Drain all water from the pump and associated plumbing.
- Store the pump in a warm, dry location if possible, or ensure it is completely dry before storing in freezing conditions.
5.3 General Inspection
Periodically check all connections for leaks, inspect the power cord for damage, and ensure the pump is securely mounted.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not run | No power; tripped circuit breaker; motor overheating; faulty pressure switch. | Check power connection and outlet; reset breaker; allow motor to cool; inspect pressure switch wiring. |
| Low water flow/pressure | Clogged strainer; air in system; restricted inlet/outlet; low voltage. | Clean strainer; bleed air from system; check hoses for kinks; verify power supply. |
| Pump runs continuously | Leak in plumbing; faulty pressure switch; air in system. | Check all connections for leaks; inspect/replace pressure switch; bleed air from system. |
| Excessive noise/vibration | Loose mounting; air in system; debris in pump. | Securely mount pump; bleed air; clean strainer and inspect pump for foreign objects. |
7. Specifications
| Feature | Detail |
|---|---|
| Model | 3WDP4-55-115V |
| Brand | WASSERMANN |
| Voltage | 115V AC |
| Amperage | 0.9 Amps |
| Maximum Flow Rate | 4.0 Gallons Per Minute (GPM) |
| Pressure Switch Setting | 55 PSI |
| Max Suction Lift | 10 Feet |
| Max Total Lift | 98 Feet |
| Inlet/Outlet Diameter | 1/2 inch |
| Power Cord Length | 3.5 Feet |
| Material | Copper (motor), Thermoplastic (pump body) |
| Certifications | CE, ROHS |
Image 7.1: Detailed product dimensions for the WASSERMANN water pressure pump and its components, including the strainer and hose adapters.
8. Warranty and Support
The WASSERMANN 3WDP4-55-115V Water Pressure Pump comes with a 1-year worry-free warranty from the date of purchase.
For technical assistance, troubleshooting, or warranty claims, please contact WASSERMANN customer support. Refer to your purchase documentation for specific contact details or visit the official WASSERMANN website.