Strainer with top inlet valve 25/38 mm

Installing the Whale SB5865 strainer, also known as a "strum box," is recommended to improve the overall efficiency of your bilge pumping system in several ways:

Easier priming: By preventing the suction hose from sticking to the bilge floor, it ensures a constant water flow and facilitates pump priming.Water level reduction: Its top-entry design allows the bilge to be emptied down to a minimal water level, leaving less residual water.Pump protection: It filters debris, thereby extending your pump’s lifespan by preventing clogs and internal damage.Optimized flow: It helps maintain good flow by avoiding restrictions caused by direct suction against a flat surface.

The Whale SB5865 strainer is designed to be compatible with two common inner pipe diameters: 25 mm and 38 mm. This feature allows it to fit various bilge pumping system configurations.

The Whale SB5865 strainer is an essential accessory designed for manual bilge pumping and dewatering systems. Its primary role is to protect the pump and optimize water suction.

It is installed at the end of the suction hose and serves to:

Filter debris: Prevent impurities and large debris in the bilge from entering the hose and clogging or damaging the pump. Optimize suction: Prevent the hose end from sticking to a flat surface (such as the bilge floor), which could block suction. Reduce residual water: Thanks to its top-entry valve, it allows pumping water down to a very low level, minimizing stagnant water in the bilge.

A strainer is a filter placed at the end of a pump’s suction pipe, typically in a boat’s bilge. The model with an upper-entry valve, such as the Whale SB5865, is designed to prevent debris from entering the pump while allowing efficient water suction, even at very low levels.

The Whale SB5865 strainer is designed for manual pumping and bilge emptying. Its primary function is to filter water before it reaches the pump, protecting the pump from debris and blockages.

It protects the pump from debris and obstructions, extending its lifespan. It prevents the suction hose end from sticking to a flat surface, ensuring continuous flow. It allows minimizing the water level in the bilge, improving drainage efficiency.

The Whale SB5865 strainer is designed for use with 25 mm and 38 mm diameter hoses.

The Whale SB5865 strainer is a recommended accessory for Whale manual bilge pumps, such as the Gusher® 10 Mk3 (references BP3708 and BP3740), to optimize their suction performance.

Installing an intake strainer ensures maximum pump efficiency by preventing debris from clogging the system. It also allows pumping water down to a minimal level without the hose sticking to the bilge bottom.

The strainer must be placed at the end of the suction pipe, at the lowest point of the bilge where water is likely to accumulate. To minimize pumping effort, it is advisable to position the pump midway between the strainer and the hull outlet.

Thanks to its design, the SB5865 strainer prevents the end of the suction hose from sticking to a flat surface, allowing the pump to continue drawing water even when the level is very low, thereby reducing the residual water volume in the bilge.

The Whale SB5865 strainer is a separately sold accessory. The packaging contents include the strainer itself.

The top-entry valve allows water to be efficiently drawn in through the top of the strainer, even if the bottom is partially blocked or the water level is very low. This ensures continuous suction and minimizes the risk of clogging.

The Whale SB5865 strainer is primarily designed for manual pumping and bilge draining and is a recommended accessory for Whale manual pumps such as the Gusher® 10 Mk3. Its use with other pump types depends on pipe diameter compatibility and the pump's specific requirements.

Yes, it is recommended to use a reinforced hose on the pump inlet (between the strainer and the pump) to prevent it from collapsing during suction, which could reduce pumping efficiency.

By preventing the suction pipe from clogging and ensuring the pipe inlet is not blocked against a flat surface, the SB5865 strainer maintains a clear path for water, which contributes to quick priming and consistent pump flow.

The SB5865 strainer is designed to be easily installed at the end of your pump's suction hose. Installation typically involves securing the hose to the strainer's fittings.

Incorrect installation of pumping system components, including accessories like the strainer, may potentially void the pump warranty. It is important to follow the manufacturer's installation instructions for the pump and its accessories.

To ensure optimal performance, it is recommended to regularly check the SB5865 strainer and clean it of any debris that may accumulate. This helps maintain an unobstructed water flow to the pump.

The top-entry function (top entry) of the SB5865 strainer is to allow water to be drawn from the top, which is particularly useful when the water level is very low or if the strainer bottom is partially clogged with sediment. This ensures continuous and efficient suction.