1. Introduction
This manual provides essential information for the safe and efficient operation of your DC HOUSE 42 Series RV Water Pump. This 12V diaphragm pressure pump is designed for reliable water transfer in various applications, including RVs, yachts, trailers, and off-grid cabins. It features a 3.5 gallons per minute (GPM) flow rate and a 55 PSI shut-off pressure, ensuring consistent water supply.
Please read this manual thoroughly before installation and use to ensure proper function and longevity of the pump.
2. Safety Information
Always observe basic safety precautions to reduce the risk of personal injury and damage to the pump or property.
- Electrical Safety: Ensure the power source matches the pump's voltage (12V DC). Disconnect power before performing any service or maintenance. Use appropriate fuses (e.g., 10A) in the power line.
- Liquid Compatibility: This pump is designed for portable water, drinking water, salt water, and weakly acidic/other non-corrosive liquids.
- Temperature Range: Do not transport corrosive or flammable liquids. Maintain liquid temperature between 0-60°C (32-140°F).
- Installation: Install the pump in a dry, well-ventilated area. Protect from freezing temperatures.
- Run Dry Protection: The pump is designed to run dry without damage, but continuous dry running is not recommended.
3. Package Contents
Verify that all items listed below are included in your package:
- 1 x 12V Water Diaphragm Pump
- 2 x 1/2" Barbed Hose Adaptors
- 1 x Teflon Tape
- 1 x Transparent Strainer
- 1 x User Manual (this document)
- 1 x Pressure Switch L-rotator
4. Product Features
The DC HOUSE 42 Series RV Water Pump is engineered with several features for optimal performance and user convenience:
- High Performance: Delivers a flow rate of up to 3.5 GPM with a shut-off pressure of 55 PSI, providing strong and consistent water flow.
- Quiet Operation: Equipped with an anti-vibration rubber base to significantly reduce noise during operation, ensuring a quieter environment.
- Automatic Pressure Switch: Features an on-demand pressure switch that automatically starts and stops the pump when a faucet is opened or closed, mimicking home water usage. The adjustment range for the shut-off pressure is 35-70 PSI.
- Bypass Switch: Helps reduce pump cycling and strain on the pressure switch, contributing to a longer service life and smoother water flow at low rates.
- Durable Construction: Incorporates a 100% pure copper motor for enhanced durability and efficiency.
- Safety Mechanisms: Includes thermal protection to prevent overheating and is designed to run dry without sustaining damage.
- Versatile Application: Suitable for various mobile and off-grid water systems, including RVs, travel trailers, fifth-wheel trailers, motorhomes, yachts, and off-grid cabins.
5. Installation and Setup
Follow these steps for proper installation of your water pump:
- Mounting: Securely mount the pump in a stable location, preferably below the water tank level for easier priming. The pump can be installed in any direction/orientation.
- Strainer Installation: Firmly tighten the transparent strainer onto the pump's inlet port. This prevents debris from entering the pump.
- Hose Adaptors: Install the 1/2" barbed hose adaptors to the threaded MNPT on the pump's inlet and outlet ports. Use Teflon tape on threads to ensure a watertight seal.
- Plumbing Connections: Connect your water lines to the barbed hose adaptors. Ensure all connections are secure and leak-free.
- Electrical Wiring: Connect the pump to a 12V DC power source. Ensure correct polarity (red wire to positive, black wire to negative). Install a 10A fuse in the positive power line.
- Priming: The pump is self-priming up to 9.8 feet (vertical lift). Open a faucet in your system to allow air to escape and the pump to prime.
6. Operation
The DC HOUSE 42 Series RV Water Pump operates automatically based on water demand:
- Automatic On/Off: When a faucet is opened, the pressure in the water system drops, and the pump automatically turns on to supply water. When the faucet is closed, the pressure builds up, and the pump automatically shuts off at its set pressure (factory set at 55 PSI).
- Pressure Adjustment: The shut-off pressure can be adjusted within a range of 35-70 PSI using the pressure switch L-rotator. Turning the screw clockwise increases pressure, and counter-clockwise decreases it. The factory set pressure usually meets most water needs without adjustment.
- Bypass Function: The integrated bypass switch allows for smooth water use at low flow rates by recirculating excess water back to the pump inlet, reducing rapid cycling of the pump.
7. Maintenance
Regular maintenance ensures optimal performance and extends the life of your pump:
- Strainer Cleaning: Periodically inspect and clean the transparent strainer to remove any accumulated debris. A clogged strainer can reduce pump performance.
- Winterization: In freezing conditions, drain all water from the pump and plumbing system to prevent damage from ice expansion. Follow your RV or boat manufacturer's winterization procedures.
- Connections: Regularly check all hose and electrical connections for leaks or corrosion. Tighten as necessary.
- Storage: If storing the pump for an extended period, ensure it is clean, dry, and protected from extreme temperatures.
8. Troubleshooting
Refer to the table below for common issues and their solutions:
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not run | No power; Blown fuse; Loose wiring | Check power supply; Replace fuse; Secure connections |
| Low water flow/pressure | Clogged strainer; Air leak in inlet; Low voltage; Kinked hose | Clean strainer; Check inlet connections; Verify 12V supply; Straighten hose |
| Pump runs continuously/cycles rapidly | Air in system; Leak in plumbing; Pressure switch needs adjustment | Purge air by opening faucets; Check for leaks; Adjust pressure switch (see Operation) |
| Noisy operation | Loose mounting; Air in system; Debris in pump | Secure mounting; Purge air; Clean strainer/inspect pump |
9. Specifications
Detailed technical specifications for the DC HOUSE 42 Series RV Water Pump:
- Brand: DC HOUSE
- Model Number: DPHC-T42-12V
- Power Source: DC
- Voltage: 12 Volts (DC)
- Maximum Flow Rate: 3.5 Gallons Per Minute (GPM)
- Shut-off Pressure: 55 PSI (Adjustable range: 35-70 PSI)
- Maximum Lifting Height: 131 Feet
- Item Weight: 2.3 Kilograms
- Product Dimensions (L x W x H): 8.58" x 5.12" x 4.41"
- Material: Mesh, Metal, Plastic
- Color: Blue-white
10. Warranty and Support
DC HOUSE is committed to providing quality products and customer satisfaction. If you encounter any after-sales issues or have technical questions regarding your water pump, please contact our customer service team via your order details. We have a dedicated team ready to provide relevant support.
For further assistance, please refer to the contact information provided with your purchase or visit the official DC HOUSE store online.