DC HOUSE 33-Series Industrial Water Pressure Pump 115VAC 3.3GPM 45PSI User Manual

1. Introduction

This manual provides essential information for the safe and efficient operation, installation, and maintenance of your DC HOUSE 33-Series Industrial Water Pressure Pump. This pump is designed to deliver a water flow of 3.3 gallons per minute (GPM) with a pressure switch set to 45 PSI, operating on 115VAC. It is suitable for various applications including kitchen, bathroom, RV, marine, yacht, and caravan use, as well as for general water transfer and pressurization needs.

The pump features self-priming capabilities up to 9.8 vertical feet and includes an on-demand pressure switch that automatically activates when water is required and deactivates when the flow stops. It is designed for quiet operation and includes thermal protection to prevent damage from overheating.

2. Safety Information

Please read and understand all safety instructions before installing or operating the pump. Failure to follow these instructions may result in electric shock, fire, serious injury, or property damage.

Electrical Safety: Ensure the power supply matches the pump's voltage (115VAC). Always connect the pump to a properly grounded outlet. Do not operate the pump with damaged cords or plugs. Disconnect power before performing any maintenance or installation.
Water Connections: Ensure all water connections are secure to prevent leaks. Do not operate the pump with dry connections unless specified.
Operating Environment: Do not immerse the pump in water. Install the pump in a dry, well-ventilated area, protected from freezing temperatures.
Temperature: Avoid operating the pump with liquids above the maximum recommended temperature (refer to specifications).
Children and Pets: Keep children and pets away from the pump during operation.
Thermal Protection: The pump is equipped with thermal overload protection. If the motor overheats, it will automatically shut off and restart once it cools down. Do not attempt to bypass this safety feature.

3. Setup and Installation

Follow these steps for proper installation of your water pressure pump.

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 Component Overview

DC HOUSE 33-Series Water Pressure Pump with In/Out ports and strainer

Figure 1: Pump overview showing the 'In' (inlet) and 'Out' (outlet) ports, and the included strainer. The pump is self-priming up to 9.8 vertical feet and provides a high flow rate of 3.3 GPM.

DC HOUSE 115V Water Pressure Pump with included accessories

Figure 2: The AC 115V Water Pressure Pump along with various fittings, a strainer, and thread seal tape for installation.

3.3 Mounting the Pump

Mount the pump in a secure, dry location. The pump features anti-vibration rubber feet to reduce working noise. Ensure there is adequate space around the pump for ventilation and future maintenance.

3.4 Water Connections

The pump has threaded connections designed to connect to ≥ 1/2" outlets. Use the provided fittings and thread seal tape to ensure watertight connections.
Connect the water source to the 'In' port and the output line to the 'Out' port. Ensure the flow direction arrows on the pump and strainer align with your water flow.
Important: Before initial use, ensure to remove any blue protective caps from the pump manifold ports. Failure to do so will prevent the pump from operating correctly.
Install the included strainer on the inlet side to protect the pump from debris.

Figure 3: Examples of threaded and barbed fittings for connecting to 1/2" outlets.

Figure 4: Diagram illustrating the assembly of the water strainer, including the mesh filter and O-ring.

3.5 Electrical Connection

The pump comes with a pre-installed power plug for 115VAC standard wall outlets. Connect the pump directly to a grounded 115VAC power source. Do not use extension cords unless absolutely necessary and ensure they are rated for the pump's power requirements.

Figure 5: Basic electrical connection diagram showing positive (+) and negative (-) terminals. The pump is pre-wired for 115VAC operation.

4. Operating Instructions

The DC HOUSE 33-Series pump is designed for user-friendly operation with its automatic features.

4.1 Initial Start-up

Ensure all water connections are secure and the inlet strainer is clean.
Verify the pump is connected to a proper 115VAC power source.
Open a faucet or outlet connected to the pump. The pump will automatically start to prime and deliver water.
Allow the pump to run until a steady flow of water is achieved and all air is purged from the system.

4.2 Automatic Operation

The pump is equipped with an on-demand pressure switch. It will automatically start when a faucet or water outlet is opened, causing a drop in pressure, and will stop when the faucet is closed and the system pressure is restored.

4.3 Adjusting Pressure

The pump features an adjustable pressure switch, typically ranging from 17-60 PSI. To adjust the pressure, locate the adjustment screw on the pressure switch (refer to Figure 6). Turning the screw clockwise will increase the pressure, and turning it counter-clockwise will decrease the pressure.

Adjustable on-demand pressure switch on the pump

Figure 6: Close-up of the adjustable on-demand pressure switch. Turning clockwise increases pressure, counter-clockwise decreases it.

Pump features including adjustable pressure switch and thermal protection

Figure 7: Overview of pump features, highlighting the adjustable pressure switch (17-60 PSI) and thermal overload protection.

Comparison of water flow before and after pump installation

Figure 8: Visual comparison demonstrating improved water pressure after the pump is installed and operating.

5. Maintenance

Regular maintenance ensures optimal performance and extends the lifespan of your pump.

5.1 Cleaning the Strainer

Periodically inspect and clean the inlet strainer to prevent debris from entering the pump and reducing flow. To clean:

Disconnect power to the pump.
Unscrew the clear housing of the strainer.
Remove the mesh filter and rinse it thoroughly under clean water.
Inspect the O-ring for damage and ensure it is properly seated before reassembling.

Strainer cleaning and reassembly diagram

Figure 9: Visual guide for disassembling and cleaning the inlet strainer.

5.2 Winterization (if applicable)

If the pump is used in an environment where freezing temperatures may occur, it must be drained and winterized to prevent damage. Disconnect the pump from the water lines and drain all water. Store in a warm, dry place.

5.3 Motor Brush Replacement

The motor brushes are a wear item and may require replacement over time. If the pump becomes intermittent or stops working, worn brushes could be the cause. Replacement is possible by disassembling the motor housing. Note that brush sizes can vary, so ensure you obtain the correct size for your specific model (e.g., 7.34mm x 7.56mm x 19mm as noted by some users).

When disassembling the pump for any reason, pay close attention to the orientation of the pump diaphragm in relation to the 'In' and 'Out' ports. Markings or arrows are often present to guide correct reassembly, which is crucial for proper pump function.

6. Troubleshooting

This section addresses common issues you might encounter with your DC HOUSE water pressure pump.

Problem	Possible Cause	Solution
Pump does not start or runs intermittently.	No power or loose electrical connection. Worn motor brushes. Thermal overload protection activated. Pressure switch malfunction.	Check power supply and connections. Inspect and replace motor brushes if worn. Allow pump to cool down; it should restart automatically. Check for obstructions or excessive load. Verify pressure switch settings and function.
Pump runs but no water flows or flow is low.	Inlet strainer clogged. Air in the system (not fully primed). Blue protective caps still on ports. Incorrect diaphragm orientation after reassembly. Kinked or blocked inlet/outlet hoses. Low water source.	Clean the inlet strainer (refer to Section 5.1). Ensure water source is open and allow pump to run to purge air. Crucial: Remove any blue protective caps from the pump ports. If pump was disassembled, verify diaphragm orientation with 'In'/'Out' arrows. Check all hoses for obstructions or kinks. Ensure adequate water supply to the pump.
Pump does not shut off automatically or turns on randomly.	Leak in the system (e.g., faucet, pipe, fitting). Pressure switch setting too low or faulty. Air trapped in the system.	Inspect all plumbing for leaks and repair as necessary. Even small drips can cause the pump to cycle. Adjust the pressure switch (refer to Section 4.3). If faulty, it may need replacement. Ensure the system is fully primed and free of air.
Pump is excessively noisy.	Air in the system. Loose mounting. Debris in the pump head.	Bleed air from the system. Ensure the pump is securely mounted. Clean the strainer and check for internal debris (requires disassembly).

7. Specifications

Feature	Detail
Brand	DC HOUSE
Model	33-Series (115V 3.3GPM 45PSI)
Color	Malachite Blue
Material	Polypropylene (PP), Stainless Steel
Power Source	Corded Electric
Voltage	115 Volts AC
Maximum Flow Rate	3.3 Gallons Per Minute (GPM)
Pressure Switch Setting	45 PSI (Adjustable range 17-60 PSI)
Maximum Lifting Height (Self-Priming)	9.8 Feet (Vertical)
Item Weight	5.68 pounds
Package Dimensions	10.63 x 5.87 x 5.2 inches

Product dimensions of the DC HOUSE 33-Series pump

Figure 10: Detailed product dimensions, including overall height, width, and connection sizes.

Figure 11: Technical drawing providing precise measurements for installation planning.

8. Warranty and Support

DC HOUSE is committed to providing support for its products. If you have any after-sales or technical questions regarding your water pump, please contact customer service via your order details. Our dedicated customer service team is available to provide assistance.

For more information or to explore other DC HOUSE products, visit the official DC HOUSE Store on Amazon.

DC HOUSE 33-Series 115V 3.3GPM 45PSI

DC HOUSE 33-Series Industrial Water Pressure Pump User Manual