1. Introduction
This manual provides essential information for the safe and efficient operation, installation, and maintenance of your SEAFLO 33 Series Water Pump and Accumulator Tank System. This pre-assembled system is designed to deliver consistent water pressure for marine, RV, off-grid, and home water applications. Please read this manual thoroughly before installation and use.
2. Safety Information
Adhering to these safety guidelines is crucial for preventing injury and damage to the product.
- Electrical Safety: Ensure the power supply matches the pump's voltage (115V AC). All electrical connections must be performed by a qualified electrician and comply with local codes. Disconnect power before servicing.
- Pressure Safety: Relieve air pressure in the system before performing any maintenance or disconnection.
- Liquid Compatibility: Do not pump flammable liquids such as gasoline, kerosene, fuel oil, or similar substances. This pump is designed for potable water only.
- Temperature Limits: Do not operate the pump with liquids above 110°F (43°C).
- Installation Environment: Install the pump in a dry, well-ventilated area, protected from freezing temperatures and direct sunlight.
- Thermal Protection: The pump is thermally protected. If it overheats, it will shut off automatically and restart once cooled. Investigate the cause of overheating.
3. Product Overview
The SEAFLO 33 Series Water Pump and Accumulator Tank System integrates a diaphragm pump, an accumulator tank, and a strainer onto a single mounting plate for compact and efficient water pressure delivery.
Figure 1: SEAFLO 33 Series Water Pump and Accumulator Tank System. The image displays the main pump unit mounted on a black base, featuring an orange pump head and a white motor housing. An accumulator tank is visible on the right, also mounted on the base. Below the main unit, four different types of hose fittings are shown: a straight barb, an elbow barb, a threaded male NPT, and a clear inline strainer with a threaded male NPT connection.
Key Components:
- Diaphragm Pump: Self-priming, capable of dry running, and provides consistent flow.
- Accumulator Tank: A 0.2-gallon pre-pressurized tank that reduces pump cycling, maintains steady water pressure, and extends pump life.
- Integrated Strainer: Protects the pump from debris in the water supply.
- Mounting Plate: Provides a stable base for installation and reduces vibration.
- Fittings: Includes various 1/2" MNPT fittings for flexible connection options.
4. Specifications
| Feature | Specification |
|---|---|
| Model | SFWSKA1-033-045-002 |
| Voltage | 115V AC |
| Open Flow Rate | 3.3 GPM (12.5 LPM) |
| Accumulator Tank Volume | 0.2 Gallon (23.5 oz / 0.75L) |
| Maximum Current Draw | 1.0A |
| Pressure Switch ON | 35 PSI (2.4 BAR) |
| Pressure Switch OFF | 45 PSI (3.1 BAR) |
| Inlet/Outlet Ports | 1/2" MNPT |
| Self-Priming Capability | Up to 6 feet (1.8m) |
| Materials | EPDM valves, Santoprene diaphragm, ABS housing |
| Product Dimensions (L x W x H) | 10.55" x 5.75" x 14.57" |
| Item Weight | 4.2 Pounds |
| Compliance | CE, ROHS |
5. Setup and Installation
The SEAFLO 33 Series system is pre-assembled for simplified installation. Ensure all safety precautions are followed before beginning.
- Mounting:
- Select a dry, secure location for mounting, protected from freezing temperatures.
- The system can be mounted horizontally or vertically. Ensure adequate space for plumbing connections and future maintenance.
- Use appropriate fasteners to secure the mounting plate to a solid surface.
- Plumbing Connections:
- Connect the water supply line to the pump's inlet port (typically marked "IN" or with an arrow indicating flow direction).
- Connect the outlet port to your water distribution system.
- Utilize the provided 1/2" MNPT fittings as needed. Ensure all connections are tight to prevent leaks. Thread sealant tape is recommended.
- The integrated strainer should be installed on the inlet side to protect the pump from particles.
- Electrical Wiring:
- Ensure the power source is 115V AC.
- Connect the pump's electrical wires to a fused power supply circuit. Refer to local electrical codes for proper wiring procedures.
- A dedicated switch for the pump is recommended for easy control.
- Priming the System:
- Open a faucet in your water system to allow air to escape.
- Turn on the water supply to the pump.
- Turn on the pump's power. The pump will begin to draw water and self-prime.
- Once a steady stream of water flows from the faucet and all air is expelled, close the faucet. The pump will build pressure and shut off.
6. Operating Instructions
Once installed and primed, the SEAFLO 33 Series pump operates automatically based on system pressure.
- Automatic Operation: The pump will turn on when water is demanded (e.g., opening a faucet) and the system pressure drops to 35 PSI. It will turn off when the demand stops and the pressure reaches 45 PSI.
- Accumulator Tank Function: The integrated accumulator tank helps maintain consistent pressure and reduces the frequency of pump cycling, especially for small water demands, leading to quieter operation and extended pump life.
- Run-Dry Protection: The pump is designed to run dry without damage, but continuous dry running should be avoided. Ensure a consistent water supply.
- Power Control: Use the dedicated power switch to turn the pump system on or off as needed.
7. Maintenance
Regular maintenance ensures optimal performance and longevity of your pump system.
- Strainer Cleaning: Periodically inspect and clean the integrated inlet strainer. Turn off the pump and water supply, unscrew the strainer housing, remove and clean the mesh screen, then reassemble.
- System Inspection: Regularly check all plumbing connections for leaks and electrical connections for corrosion or damage.
- Accumulator Tank Pressure: The accumulator tank is pre-pressurized. If you suspect issues with pressure consistency, consult a professional. Do not attempt to adjust the tank pressure without proper knowledge and tools.
- Winterization (for seasonal use):
- Drain all water from the pump and plumbing system to prevent freezing damage.
- Disconnect inlet and outlet lines and allow the pump to run briefly (1-2 seconds) to expel any remaining water.
- Store the pump in a warm, dry place if possible, or ensure the installation area is adequately heated.
8. Troubleshooting
This section addresses common issues you might encounter.
| Problem | Possible Cause | Solution |
|---|---|---|
| Pump does not run | No power; Blown fuse/tripped breaker; Loose wiring; Pressure switch failure; Motor overheating. | Check power supply and switch; Replace fuse/reset breaker; Inspect and tighten wiring; Contact support if pressure switch is faulty; Allow motor to cool. |
| Pump runs but no water flows | No water in supply; Air leak on inlet side; Clogged strainer; Pump not primed; Inlet/outlet valves closed. | Check water supply; Inspect inlet connections for leaks; Clean strainer; Re-prime the pump; Open all valves. |
| Low flow or pressure | Clogged strainer; Air leak on inlet; Partially closed valve; Low voltage; Worn pump head. | Clean strainer; Check inlet connections; Ensure all valves are fully open; Verify power supply voltage; Contact support for worn components. |
| Pump cycles on and off rapidly (short cycling) | Air in system; Leaks in plumbing; Accumulator tank low on air pressure or faulty; Too small accumulator tank for demand. | Bleed air from system; Check for and repair leaks; Contact support for accumulator tank issues; Ensure proper system sizing. |
| Excessive noise/vibration | Loose mounting; Air in system; Debris in pump; Restricted inlet/outlet. | Tighten mounting screws; Bleed air; Clean strainer and check for internal debris; Clear any restrictions in plumbing. |
9. Warranty and Support
Your SEAFLO 33 Series Water Pump and Accumulator Tank System is backed by a 4-Year Warranty from the date of purchase. This warranty covers defects in materials and workmanship under normal use.
For warranty claims, technical assistance, or replacement parts, please contact SEAFLO customer support. Keep your proof of purchase for warranty validation.
For more information, visit the official SEAFLO store: SEAFLO Store