Pedrollo 4BLOCK: Ready-to-Use Monobloc Submersible Pumps

4BLOCK or 4SR? Why choose the Monoblocco?

Problem: You have an artesian well but you're not an electrician. The thought of having to install an external control panel, connect the capacitor wires, and make waterproof splices on the cable worries you.

Solution: The Pedrollo 4BLOCK eliminates all this work.
Unlike the professional 4SR series (which has a separate motor and requires an external control panel), the 4BLOCK is an "All-in-One" device. All the starting and protection electronics are sealed inside the motor. This makes it the perfect pump for residential irrigation and DIY, drastically reducing installation time and costs.

Horizontal or Vertical Installation?

The mechanical robustness of the 4BLOCK allows for both vertical (inside the well) and horizontal (inside tanks or storage tanks) installation, as long as it is always completely submerged in water to ensure engine cooling.

Frequently Asked Questions about Pedrollo 4BLOCK

1. If the condenser breaks, do I have to throw away the pump?

No, but the replacement is more complex than with an external pump. Since the capacitor is integrated into the submersible motor, replacing it requires removing the pump from the well and accessing the motor compartment (this operation should be performed by a Pedrollo service center). However, the capacitors used are of the highest quality and designed to last the life of the pump.

2. Is it suitable for drinking water?

Yes, the Pedrollo 4BLOCK is constructed with materials suitable for contact with drinking water (AISI 304 stainless steel for the outer jacket and food-grade technopolymers for the impellers). It is commonly used to supply the water system of homes and villas.

3. How much sand can it tolerate?

The 4BLOCK shares the same patented hydraulics as its bigger brother, the 4SR. This means it can handle up to 150 grams of sand per cubic meter of water. Many low-cost competitor pumps only handle 50g/m³. This makes it ideal even for poorly cleaned or newly drilled wells.