Kripsol Ondina OK33MB 0.33 HP single-phase pool pump
Kripsol Ondina OK33MB 0.33 HP single-phase pool pump subject to supplier availability.
Estimated delivery time: 3 to 7 business days
Description
Description
Key features
- Model: Kripsol Ondina OK33MB.
- Rated power: 0.33 hp.
- Power supply: single-phase.
- Power input P1: 0.45 kW.
- Reference flow rate: 7 m³/h at 8 m.w.c..
- Motor with IP55 protection.
- Class F insulation.
- Frequency: 50 Hz.
- Speed: 2,850 rpm.
- Built-in pre-filter with transparent lid.
- Pre-filter capacity: 1.75 liters.
- Housing made of injection-molded thermoplastic.
- Impeller made of glass-fiber-reinforced Noryl.
- Insert made of AISI 303 stainless steel.
The transparent lid lets you visually check the condition of the pre-filter and makes routine cleaning easier.
OK33MB dimensions

The length of the OK33MB model is 526.5 mm. If replacing an existing pump, also check the connection positions and the available installation space.
Technical specifications of the Kripsol Ondina range
| Model | Power supply | Power | P1 | Flow rate* | Dimension A |
|---|---|---|---|---|---|
| OK33MB | Single-phase | 0.33 HP | 0.45 kW | 7 m³/h | 526.5 mm |
| OK51MB | Single-phase | 0.50 HP | 0.58 kW | 8.5 m³/h | 526.5 mm |
| OK71MB | Single-phase | 0.75 HP | 0.75 kW | 11.9 m³/h | 526.5 mm |
| OK100MB | Single-phase | 1 HP | 1.00 kW | 17.2 m³/h | 526.5 mm |
* Reference flow rate indicated at 8 m.w.c. To find out how each model performs at other heads, see the performance curves.
Performance curves

Comparison of single-phase Kripsol Ondina pumps
| Model | Power | Flow rate at 8 m.w.c. | Length A |
|---|---|---|---|
| OK33MB | 0.33 HP | 7 m³/h | 526.5 mm |
| OK51MB | 0.50 HP | 8.5 m³/h | 526.5 mm |
| OK71MB | 0.75 HP | 11.9 m³/h | 526.5 mm |
| OK100MB | 1 HP | 17.2 m³/h | 526.5 mm |
Frequently asked questions
What is the power of the Kripsol Ondina OK33MB?
The OK33MB is the 0.33 HP single-phase version in the Kripsol Ondina range.
What flow rate does the OK33MB pump provide?
The reference flow rate is 7 m³/h at 8 m.w.c.. The actual flow rate depends on the total dynamic head and head losses in each installation, so you should consult the performance curve.
Does the Kripsol OK33MB have a pre-filter?
Yes. The pump has a pre-filter with a basket and transparent lid, so you can visually check the accumulation of debris before cleaning it.
Can I replace another 0.33 HP pump with the OK33MB?
The fact that both pumps have the same power does not guarantee they are equivalent. Check the flow rate at the operating total dynamic head, the dimensions, the hydraulic connections, and the power supply before replacing the pump.
How do I choose between OK33MB, OK51MB, OK71MB, and OK100MB?
You should start with the flow rate required for filtration and the installation’s total dynamic head. Then compare this operating point with the performance curves for each model. A higher-powered pump is not necessarily the right choice for every installation.
