Grundfos AP50B.50.08.A1V 96004586 230v DIRTY WATER AND SEWAGE W/FLOATSWITCH Submersible Pump 2" #3078/89

Grundfos AP50B.50.08.A1V – 230V Dirty Water / Wastewater Submersible Pump with Float Switch (96004586) #3078/89

This listing is for a Grundfos UNILIFT AP50B.50.08.A1V submersible dirty water / wastewater pump with a vortex impeller, 50 mm free passage, R 2 inch discharge port and float switch for automatic start/stop operation. The AP50B range is designed for dirty water, surface water, groundwater, wastewater and similar effluent duties where solids handling is required.

Condition: supplied in as new surplus condition – the unit has not been installed or used but may show minor cosmetic markings from storage and handling. Guarantee: supplied with a 2-year guarantee.

• Pump type: vertical single-stage submersible dirty water / effluent pump
• Product number: 96004586
• Impeller: vortex impeller
• Free passage: 50 mm
• Discharge connection: R 2 inch
• Maximum flow: 6.67 L/s / 24.0 m³/h
• Maximum head: 11 m
• Maximum installation depth: 2 m
• Maximum liquid temperature: 40 °C
• Electrical supply: 1 × 230 V, 50 Hz
• Motor: PSC single-phase motor
• Power: P1 1.2 kW / P2 0.74 kW
• Rated current: 5.37 A
• Rated speed: 2790 rpm
• Float switch: yes – automatic start/stop control
• Cable: 5 m mains cable with Schuko plug
• Protection: IP68, insulation class F, internal thermal protection
• Materials: stainless steel pump housing and impeller, AISI 304 / EN 1.4301
• Seal arrangement: double shaft seal with intermediate oil chamber
• Installation: suitable for free-standing installation or compatible auto-coupling systems

Need help confirming suitability?
Call us on 01803 220416 for technical advice.

Manufacturer product page

Full technical specifications, curves and documentation can be viewed on the official Grundfos product page:
View Grundfos AP50B.50.08.A1V (96004586) – Variant curves

Technical documentation

Installation, operating and application guidance for the UNILIFT AP range can be viewed here:
View Grundfos UNILIFT CC, KP, AP and KPC technical documentation

Typical applications

• Dirty water pumping
• Surface water and rainwater
• Groundwater
• Drainage pits and sumps
• Wastewater and effluent duties
• Temporary or permanent drainage installations

Frequently Asked Questions

What does the model number mean?

• UNILIFT AP – Grundfos submersible drainage / dirty water pump range
• 50 – maximum solid size / free passage class
• B – AP Basic pump type
• 50 – nominal outlet diameter class
• 08 – motor power output code
• A – automatic version with float switch
• 1 – single-phase motor
• V – vortex impeller

What discharge connection does this pump have?

This pump has an R 2 inch discharge port. Please check your existing pipework, hose connection or auto-coupling arrangement before ordering.

Does this pump include a float switch?

Yes. In the model code AP50B.50.08.A1V, the A immediately before “1V” indicates the automatic version with float switch. The float switch allows the pump to start and stop automatically as the liquid level rises and falls.

What is a vortex impeller?

A vortex impeller creates a swirling flow through the pump housing, helping solids and dirty water pass through with reduced contact with the impeller itself. This makes it useful for dirty water and wastewater duties where clog resistance is more important than maximum hydraulic efficiency.

What size solids can this pump pass?

This pump has a 50 mm free passage, making it suitable for dirty water and wastewater applications with suspended solids within the pump’s design limits.

Is this suitable for sewage?

This pump is suitable for dirty water, wastewater and effluent-style duties where the solids and liquid type are within the pump’s limits. For foul sewage, toilet discharge or heavily contaminated wastewater, suitability should be checked carefully against the full application, installation type and local requirements before ordering.

Does this pump have a mechanical shaft seal?

Yes. The pump uses a double shaft seal arrangement with an intermediate oil chamber pre-filled with non-toxic special oil.

Is this pump ready to install?

The pump is supplied with a ring stand, carrying handle, 5 m mains cable and float switch. Final installation depends on the site arrangement, pipework, electrical protection and whether it is being used free-standing or with an auto-coupling system.

Who should install this pump?

Installation should be carried out by a competent person. The pump must be installed, wired and protected according to the manufacturer instructions and applicable electrical regulations.

About Our Stock

Stock code: #3078/89
We specialise in supplying new and unused surplus pumps. All units are inspected prior to dispatch and supplied with a 2-year guarantee.