The APP BPS automatic pumps combine compact submersible pumping with reliable automatic control using a float switch. With a top discharge and water-cooled design, they are ideal for applications where space is limited and the pump may operate partially submerged.
Choose the BPS automatic models when you want hands-free pumping that starts and stops based on water level. Models with the “A” suffix use a float switch for fixed automatic operation. Pendant floats are best in wider, unobstructed chambers, while narrow or obstructed sumps may suit alternative float arrangements. If your sump is very narrow or your water levels are extremely shallow, the BPS-100EA is purpose-built for that scenario.
Suitable for:
Not recommended for ponds or water features.
BPS automatic pumps are built in durable thermoplastic with a top discharge configuration for restricted spaces. They use a carbon/ceramic mechanical seal in an oil chamber with an inner lip seal for wear resistance. Do not allow the pump to run dry. Shaft materials are model-specific: 304 stainless steel shafts on BPS-80 and BPS-100, and a 410 stainless steel shaft on the BPS-400.
Below is a diagram comparing a manual BPS pump with automatic BPS pumps using both pendant and tube float switch designs:
For automatic pumping in narrow sumps, the BPS‑100EA is recommended, as its compact float switch reduces the risk of obstruction. Pendant floats can become trapped in restricted chambers (as shown above).
For more information on float switch types, see our Automatic Water Pump blog.
All APP water pumps are supplied with a 2‑year manufacturer’s warranty.
| Model | BPS 80 | BPS 80A | BPS 100 | BPS 100A | BPS 100EA | BPS 400 | BPS 400A |
|---|---|---|---|---|---|---|---|
| Manual/ Auto | M | A | M | A | A | M | A |
| Outlet Size/ mm | 19 | 19 | 19 & 25 | 19 & 25 | 19 & 25 | 50 | 50 |
| Kw | 0.08 | 0.08 | 0.10 | 0.10 | 0.10 | 0.40 | 0.40 |
| Volt | 230 | 230 | 110/230 | 110/230 | 230 | 230 | 230 |
| Flow Ltr/min | 40 | 40 | 70 | 70 | 70 | 220 | 220 |
| Head/ m | 4 | 4 | 6.5 | 6.5 | 6 | 9 | 9 |
| On Level/ mm (approx.) | - | 290 | - | 300 | 30 | - | 450 |
| Off Level/ mm (approx.) | - | 90 | - | 150 | 3 | - | 210 |
| Free Passage | 2 | 2 | 3 | 3 | 3 | 5 | 5 |
| W x L x H/ mm | 136x136x225 | 136x136x225 | 134x155x250 | 134x225x250 | 134x170x250 | 160x200x365 | 160x200x365 |
| Weight/ Kg | 1.95 | 2.2 | 2.5 | 2.8 | 2.10 | 7.35 | 7.50 |
Manual Pump - A pump that does not have a float control or pressure switch to start and stop. It will require an operator to control it.
Automatic Pump - A pump that has a float control or pressure switch to start and stop without an operator.
A float switch is a level controller that has a buoyant, water-tight device that lies
on a liquid, actuating a micro-switch when the level rises or falls, turning a pump on or off.
Layflat hose is very affordable but can kink. Depending on your use, you may be better using a reinforced suction delivery hose for your needs.
Suction delivery hose is ideal for pumping up stairs or over obstacles.
Jonathan Martin explains the differences to help you choose which hose is best for your scenario.
Each type of float switch has its advantages and is best suited for specific scenarios. The choice of float switch depends on factors such as the type of liquid, space constraints, required accuracy, and the pump's intended application.
