Introduction to Jabsco Rule

Pipe runs should always be kept as short and straight as possible. Plumbing should always be reinforced, non-collapsible hose of the recommended size. Electric pumps should always be installed in a dry, well-ventilated position as close to the liquid to be pumped as possible. Flexible impeller pumps must not be run dry. Bilge pumps and water pumps in particular should be fitted with a filter or strainer on the inlet plumbing to protect them from debris. These should be fastened to the boat structure to ensure their permanent location. Mount flexible impeller pumps so that some water is left in the pump body when the pump is shut off. This will prolong impeller life and speed priming. Pumps must be installed with the overboard discharge well above the waterline (both static and heeled) to avoid water siphoning back into the vessel. Versatile: The flexible impeller pump combines the priming features of positive displacement type pumps with the general transfer ability of centrifugals. It will pump either thin or viscous liquids and can handle more solids in suspension than other types of rotary pumps. The pump can be mounted at any angle and will pump in either direction with equal efficiency. Self-Priming: Pumps instantly with dry suction lifts up to (3m) and up to (8m) when wetted. Simplicity: One moving part, a tough, long-life, wear-resistant flexible impeller. Flexibility: The flexible impeller pump offers both high flow and high pressure according to motor and impeller design. CE and ISO 8849 certification. Ignition protection.

A. Flexible impeller blades create a nearly perfect vacuum for instant self-priming.

B. As the impeller rotates, each successive blade draws in liquid and carries it from intake to outlet port.

C. As the flexible impeller blades contact the offset cam, they bend with a squeezing action that provides a continuous, uniform flow.

Electric pumps should always be installed in a dry, well-ventilated position as close as possible to the liquid to be pumped. Plumbing should always be reinforced, non-collapsible hose of the recommended size. Bilge pumps and water diaphragm bilge pumps in particular should always be fitted with a filter and strainer on the inlet plumbing to protect them from debris. These should be fastened to the boat structure to ensure their permanent location. Pumps must be installed with the overboard discharge well above the waterline (both static and heeled) to avoid water siphoning back into the vessel. Electric diaphragm pumps can be run dry for up to two hours. Self-Priming: Vertical lift up to (5m) for manual pumps and (2-3m) for electric pumps. Dry Running: Diaphragm pumps can be run dry for extended periods with no damage, therefore requiring less attention during use. Versatility: Self-priming and dry running capabilities mean few limitations on use. Larger manual diaphragm pumps have the ability to handle some solids in suspension. Electric diaphragm pumps make excellent bilge pumps for boats with shallow bilges, or bilges with restricted areas. Quiet Running: Electric pumps feature smooth flow and low noise levels.

A. The diaphragm, pulled upward by the movements of a piston or a handle, causes a partial vacuum, opening the inlet port and closing the outlet, drawing in liquid.

B. Downward movement of the diaphragm pressurizes the liquid, closing the inlet valve and opening the outlet valve through which liquid is expelled by pressure.

Pipe runs should be kept as short and straight as possible, avoiding rising and dipping over obstructions as this can cause airlocks. Always use hose of the recommended size, and of a rigid or reinforced type that will not collapse under suction conditions. Electric pumps should always be installed in a dry, well-ventilated position as close as possible to the liquid to be pumped. Durable: Heavy-duty construction with quality materials gives long life. The body is designed to resist environmental damage. The vanes and rotor are constructed of a wear-resistant, long-life material. Self-Priming: Self-priming up to (4m). Simplicity: There are few moving parts to replace. The rotor, vanes and seal are lubricated by the liquid being pumped. Versatile: An excellent compact unit for pumping diesel fuel or hydraulic oil. Can run in either direction.

A. The vanes create a partial vacuum for priming.

B. As the rotor rotates, each successive vane draws and carries liquid from the intake to the discharge port.

C. When the vanes contact the eccentric portion of the pump body, they force liquid out the discharge port head.

Pipe runs should be kept as short and straight as possible, avoiding rising and dipping over obstructions as this can cause airlocks. Always use hose of the recommended size. Submersible bilge pumps must be installed with the overboard discharge well above the waterline (both static and heeled) to avoid water siphoning back into the vessel. High-Volume Flow: Centrifugal pumps handle high volumes with a smooth, non-pulsating flow. The flow rate can be regulated from maximum output to no flow with no damage to the pump. An excellent pump for general transfer applications. Low Maintenance: Few moving parts means that wear due to operation is minimal. Easy Installation: Compact size for flow rate. Option of port positions simplifies pipe runs. Versatility: Centrifugal pumps can be built in submersible form, making excellent bilge pumps. Low Power Consumption: Electric centrifugal pumps consume less power than most other bilge pumps.

A. Centrifugal pumps must be either initially primed or mounted in such a way that liquid is permanently available at the inlet port (e.g., submersible pumps).

B. The rotating impeller gives velocity energy to the liquid, moving it to the periphery of the volute casing and toward the discharge port.

C. The volute casing discharge arrangement converts velocity energy into static pressure or available pump head.

Pressure controlled diaphragm pumps provide boat owners with a fresh water system that is as easy to use as their domestic water supply with the versatility to offer full flow or a trickle. The pump is controlled by a switch which senses the pressure drop when a faucet is opened and activates the pump; it turns off when the system pressure builds to a pre-set limit as the faucet is closed. This system allows any type of faucet or shower valve to be fitted, from 3/8 inch (10mm) bore for minimum water use to 1/2 inch (13mm) bore for maximum flow. Choosing the pump for your needs is simple just check your system size and the number of outlets you need to operate simultaneously and select the appropriate pump. Diaphragm pumps are self-priming, quiet in operation and can run dry for extended periods. It is always best to turn the pump off and then open a tap to de-pressurize the system when you are not using the boat, as this will prolong pump life.

Accumulator tanks hold a reservoir of air and water downstream from the pump. The air acts as a cushion, absorbing pump and pressure fluctuations, smoothing the flow and making the system quieter. Accumulators allow the pump to reach shut-off pressure more smoothly which reduces the on/off cycle and gives better control of hot water delivery. Our accumulator tanks all have a bladder that separates water from air. The bladder is pre-pressurized, but may need fine tuning when installed to give the most efficient performance. One of the advantages of an accumulator tank is that they can dispense up to half of their capacity of water even when the pump is switched off. So the bigger the reservoir, the more water you have available without having to switch the pump on, helping you wash your hands or clean your teeth without noise.

Washdown pumps are a development of our Water Pressure System Pumps. Higher shut-off pressure switches prevent on/off cycling while salt water compatible trigger nozzles let you blast off mud and dirt and then rinse down.

Inlet water regulators are designed to protect your boat water system plumbing and fixtures from the possible high pressure of municipal water systems. Regulation is controlled at all flow rates by a pre-set spring, and a removable strainer traps debris. Both in-line portable and permanent flush mount models are available in our line of diaphragm sealed regulators.

Inlet strainers are an essential part of any fresh water system using a diaphragm pump protecting the valves from small particles in the water. Our Pumpgards have been designed for easy installation and rapid filter screen cleaning, having a transparent bowl that screws off to allow simple, regular inspection.