The Seaflo 21 Series supplies freshwater to caravan and boat outlets, with a maximum flow of 3.8L/min and a 40psi shutoff pressure. Its 12V supply and small pump body suit installations where space is limited.
The pressure switch starts the pump when an outlet opens and stops it when pressure builds after the outlet closes. The self-priming design draws water from the supply tank. Supplied 3/8" and 1/2" hose barbs connect the pump to the water lines.
Designed for intermittent use. Flow decreases as delivery pressure rises; maximum flow and shutoff pressure are separate limits.
Seaflo 21 Series Water Pump Specifications
Seaflo 21 Series Installation Manual
The Seaflo RV Supreme supplies pressurised freshwater to caravan and boat outlets, using 12V and 24V options. Maximum flow is 9.5L/min, and the pressure switch shuts off at 55psi. Both ports have 1/2"-14 male NPT threads for matching female fittings.
Opening an outlet lowers system pressure and starts the pump; closing it allows pressure to build until the switch stops the motor. Internal bypass control helps handle low water demand. Maximum flow and shutoff pressure describe separate operating limits.
Supply caravan and boat freshwater outlets with the Seaflo 33 Series 12V demand pump. It delivers up to 11.6L/min, with pressure-switch shutoff at 45psi. The inlet and outlet use 1/2"-14 male NPT threads for matching female NPT fittings.
Automatic pressure control starts the pump as water is drawn and stops it when the outlet closes and pressure builds. A flexible diaphragm moves the water through the pump, while the valves control its direction. The diaphragm is Santoprene and the valves are EPDM.
Maximum flow is measured at low pressure. Delivery falls as pressure increases towards shutoff.
The Seaflo 41 Series supplies freshwater to boat and caravan outlets at up to 17L/min, with a 40psi shutoff pressure. Its 3/4" Quick Attach ports accept the corresponding Seaflo adaptors, allowing the hose or threaded connection to be matched to the installation.
The 12V pump starts and stops automatically as outlets are used. Internal bypass control helps handle small water draws, while the four-chamber diaphragm assembly moves water through the pump. Motor thermal protection helps protect against overheating; the pump remains intended for intermittent use.
Flow decreases as pressure rises. Use the performance data in the linked sheet to assess delivery at the required pressure.
Seaflo 41 Series Water Pump Specifications
Seaflo 41 Series Installation Manual
The Seaflo 0.75L accumulator tank helps smooth water delivery from pressure-switch-controlled pumps in boat, caravan and other small water systems. An internal rubber bladder separates water from compressed air, which cushions pressure changes and supplies a small reserve between pump cycles. Fewer starts reduce wear from repeated starting and stopping, helping extend pump life, and can reduce electricity use and running costs.
Inlet: 1/2" male NPT thread.
Outlet: 1/2" male NPT thread.
The 0.75L rating is the internal vessel volume, not the usable water draw-off. The amount delivered before the pump restarts depends on the pump switch pressures and tank air charge.
The factory air pre-charge is 70 kPa (10 psi). Adjust the pre-charge to about 20 kPa (3 psi) below the pump switch cut-in pressure, following the tank instructions. The factory setting is not suitable for every pump.
Install on the pump’s discharge side. The tank can be mounted in any position; secure the mounting feet and support the pipework. Switch off the pump and release water pressure before disconnecting the tank or checking the air charge.
The air charge can be checked and adjusted through a standard automotive-style tyre valve. Check the air charge regularly as directed in the manual. Maximum operating pressure is 860 kPa (125 psi).
Seaflo 0.75L Accumulator Tank Installation & Operating Instructions
Connect Seaflo pump ports to hose or threaded pipework with the appropriate port adaptor. The range includes 3/4" Quick Attach adaptors for 1/2" hose or 1/2" female NPT pipework, plus 1/2" female NPT adaptors for 1/2" hose.
Quick Attach adaptors seal at the pump with an O-ring. The threaded hose adaptors fit matching male NPT ports and are available straight or with a 90-degree elbow to direct the hose alongside the pump. Quick Attach size and hose size describe different parts of the fitting.
SFPS70X (PS70X) is listed for SFDP1-050-070-51X; match the mounting and switch revision before replacement. For every replacement, confirm the complete pump model, original switch part and mounting arrangement. The pressure setting alone does not establish compatibility.
Replace a faulty pressure-control switch on a compatible Seaflo pump without replacing the complete pump. This range contains separate fixed-setting switches at 35psi, 40psi, 45psi, 55psi and 70psi.
The Seaflo 500GPH bilge pump removes accumulated water from boat bilges, with a maximum flow of 30.3L/min and maximum head of 3m. The discharge connects to 3/4" hose. Available with a 12V DC supply.
Use a manual switch for direct control, or connect a separate float switch for automatic operation as the bilge water level changes. The removable inlet strainer provides access to clear debris.
Maximum flow applies at low discharge head. Flow reduces as lift and hose resistance increase, reaching zero at maximum head.
The Seaflo 750GPH bilge pump removes accumulated water from boat bilges, with a maximum flow of 45.4L/min and maximum head of 3m. The discharge connects to 3/4" hose. Available with a 12V DC supply.
Use a manual switch for direct control, or connect a separate float switch for automatic operation as the bilge water level changes. The removable inlet strainer provides access to clear debris.
Maximum flow applies at low discharge head. Flow reduces as lift and hose resistance increase, reaching zero at maximum head.
The Seaflo 1100GPH bilge pump removes accumulated water from boat bilges, with a maximum flow of 66.5L/min and maximum head of 4m. The discharge connects to 1 1/8" hose. Available with 12V and 24V options.
Use a manual switch for direct control, or connect a separate float switch for automatic operation as the bilge water level changes. The removable inlet strainer provides access to clear debris.
Maximum flow applies at low discharge head. Flow reduces as lift and hose resistance increase, reaching zero at maximum head.
The Seaflo 1500GPH bilge pump removes accumulated water from boat bilges, with a maximum flow of 90.8L/min and maximum head of 5m. The discharge connects to 1 1/8" hose. Available with 12V and 24V options.
Use a manual switch for direct control, or connect a separate float switch for automatic operation as the bilge water level changes. The removable inlet strainer provides access to clear debris.
Maximum flow applies at low discharge head. Flow reduces as lift and hose resistance increase, reaching zero at maximum head.
The Seaflo 2000GPH bilge pump removes accumulated water from boat bilges, with a maximum flow of 121L/min and maximum head of 8m. The discharge connects to 1 1/8" hose. Available with 12V and 24V options.
Use a manual switch for direct control, or connect a separate float switch for automatic operation as the bilge water level changes. The removable inlet strainer provides access to clear debris.
Maximum flow applies at low discharge head. Flow reduces as lift and hose resistance increase, reaching zero at maximum head.
The Seaflo 750GPH automatic bilge pump removes accumulated water from boat bilges, with a maximum flow of 45.4L/min and maximum head of 3m. The discharge connects to 3/4" hose. Available with a 12V DC supply.
The integrated float switch starts pumping as water rises and stops it as the level falls, so a separate external float switch is not required. Keep the inlet strainer clear and avoid dry running.
Maximum flow applies at low discharge head. Flow reduces as lift and hose resistance increase, reaching zero at maximum head.
The Seaflo 1100GPH automatic bilge pump removes accumulated water from boat bilges, with a maximum flow of 66.5L/min and maximum head of 3m. The discharge connects to 1 1/8" hose. Available with 12V and 24V options.
The integrated float switch starts pumping as water rises and stops it as the level falls, so a separate external float switch is not required. Keep the inlet strainer clear and avoid dry running.
Maximum flow applies at low discharge head. Flow reduces as lift and hose resistance increase, reaching zero at maximum head.
Add automatic water-level control to a non-automatic bilge pump with the Seaflo SFBS-20-01 float switch. Suitable for 12V or 24V installations, it switches on at 51mm and off at 19mm, with a 1m connecting lead.
The float rises with the water to start the pump and falls to stop it. Mount it where it can move freely, and keep the surrounding area clear of debris so the float can respond to changes in water level.
Control a 12V or 24V bilge-pump installation from the helm with the Seaflo three-way switch panel. Its Automatic, Off and Manual positions let you select water-level control, isolate the control, or run the pump manually.
Automatic operation requires a compatible water-level switch in the pump circuit. The aluminium panel includes an LED indicator.
Seaflo 3-Way Bilge Pump Switch Panel Product Information
Seaflo Switch Panel Wiring Manual
Transfer clean water from a tank or container with this 12V Seaflo pump, rated for up to 11.7L/min and a maximum head of 5m. Its 1/2" hose connection carries the discharge, and it is supplied with a 1m lead.
The pump can operate submerged or inline with a flooded inlet. It is not self-priming: water must reach the inlet before the motor starts. Keep the water supply available throughout operation.
Flow falls as lift and hose resistance increase. Maximum flow and maximum head are separate limits; the linked sheet gives flow at the listed discharge heads.
Seaflo 200GPH Inline and Submersible Pump Product Information
Transfer clean water from a tank or container with this 12V Seaflo pump, rated for up to 17.6L/min and a maximum head of 6m. Its 1/2" hose connection carries the discharge, and it is supplied with a 5m lead with clips.
The pump can operate submerged or inline with a flooded inlet. It is not self-priming: water must reach the inlet before the motor starts. Keep the water supply available throughout operation.
Flow falls as lift and hose resistance increase. Maximum flow and maximum head are separate limits; the linked sheet gives flow at the listed discharge heads.
Seaflo 280GPH Inline and Submersible Pump Product Information
Transfer water from tanks and containers with the Seaflo 12V submersible pump. Maximum flow is 16L/min, with a maximum head of 5.5m, and the discharge connects to 12mm hose.
The pump operates below the water surface, keeping it at the water source while the hose carries the discharge. A 3m lead provides length for the power connection outside the tank.
Flow reduces as lift and hose resistance increase. Maximum flow and maximum head are separate limits; use the linked performance data to assess delivery for the installation.
Seaflo 16L/min Submersible Pump Specifications
Seaflo Low Voltage Submersible Manual
Move water between tanks and containers at up to 30L/min with the Seaflo flexible-impeller transfer pump, available with 12V and 24V options. The inlet and outlet have 1/2" female NPT threads for matching male fittings or hose adaptors.
The self-priming design draws water from the source into the pump. A flexible impeller moves the water through the pump housing, and motor thermal protection helps protect against overheating.
The Seaflo portable 12V kit supplies water for boat and equipment washdown, with a nominal maximum flow of 17L/min and a 70psi / 4.8bar shutoff setting. The carrying case holds a demand pump, 6m UV-protected coiled delivery hose and adjustable spray nozzle. A 2m inlet hose with filter connects to the water source.
The pressure switch starts and stops the pump as the nozzle is used. Its diaphragm moves water through the pump, while the valves control flow direction. The four-chamber assembly uses EPDM valves and a Santoprene diaphragm and is intended for intermittent washdown tasks.
Maximum flow and shutoff pressure are separate ratings. The linked sheet includes flow and current at the listed pressures to help assess delivery.
Seaflo Portable 41 Series Washdown Kit Specifications
Seaflo Portable 41 Washdown Manual
Wash boats and equipment with fresh or salt water using the Seaflo 51X Extreme pump, using 12V and 24V options. Maximum flow is 18.9L/min, with pressure-switch shutoff at 70psi / 4.8bar.
Supplied as a standalone pump for an existing washdown installation or a system assembled with separate hose and spray equipment. The pump ports have 1/2" male NPT threads.
The demand switch starts and stops the five-chamber pump as the spray outlet is used. Flow decreases as pressure rises; maximum flow and shutoff pressure are separate limits.
24V pump: temporarily unavailable.
Seaflo 51X Extreme Washdown Pumps and Kits Product Information
Wash boats and equipment with fresh or salt water using the Seaflo 51X Extreme kit, using 12V and 24V options. Maximum flow is 18.9L/min, with pressure-switch shutoff at 70psi / 4.8bar.
The kit includes the pump, spray gun, strainer, 7.5m UV-protected coiled hose, 1/2" barbed fittings and a quick hose disconnect. The pump ports have 1/2" male NPT threads.
The demand switch starts and stops the five-chamber pump as the spray outlet is used. Flow decreases as pressure rises; maximum flow and shutoff pressure are separate limits.
Seaflo 51X Extreme Washdown Pumps and Kits Product Information