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AR 801940 Pump Head for AR252 Diaphragm Pump

SKU: AR 801940
$56.00
$47.99
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Product Description

AR 801940 Pump Head for AR252 Diaphragm Pump

The Annovi Reverberi (AR) 801940 Pump Head is a replacement head for the AR252 diaphragm pump. The pump head houses the inlet and outlet valve assemblies and helps direct fluid through the pump during operation.

Replacing a damaged pump head can help restore reliable pump operation without the expense of replacing the entire pump. The AR252 uses two identical pump heads, so part 801940 can be installed on either side.

When Should You Replace the Pump Head?

A replacement pump head may be necessary when the existing head has physical damage that prevents it from sealing or functioning properly. Common reasons for replacement include:

  • Cracks or Physical Damage: Visible cracking or damage to the pump head housing.
  • Persistent Leakage: Fluid leaking from the head itself or damaged sealing surfaces after the seals and connections have been inspected.
  • Damaged Valve Seats: Wear, corrosion, or damage in the areas where the valves seat that cannot be corrected by replacing the valves.
  • Freeze Damage: Cracking caused by liquid freezing inside the pump during storage.

Check These Components Before Replacing the Head

Not every pressure or leakage problem requires a new pump head. Before ordering, inspect the following components:

  • Valves: Debris, worn valves, or damaged valve O-rings can cause poor pressure or irregular flow.
  • Diaphragms: Worn or damaged diaphragms can affect pumping performance and may require replacement.
  • Seals & Connections: Leaks around the head may be caused by damaged O-rings or loose connections rather than the head itself.
  • Inlet Filter: A restricted or clogged inlet filter can reduce flow and should be checked during troubleshooting.

If the pump head housing and sealing surfaces are undamaged, replacing the affected service components may be a more economical repair.

Product Specifications

Manufacturer Annovi Reverberi (AR)
Part Number 801940
Product Type Replacement Pump Head
Compatible Pump AR252 Diaphragm Pump
Installation Position Either Side of Pump
Quantity Used Per Pump 2

Replacement & Maintenance Tips

Before replacing the pump head, shut down the equipment, relieve system pressure, and drain the pump as directed by the manufacturer. Inspect the valves, O-rings, diaphragms, and mating surfaces during disassembly.

Use the AR252 manufacturer's service instructions for the correct assembly sequence and bolt torque specifications. Replace damaged sealing components as necessary and check for leaks before returning the pump to normal operation.

1 Review

  • 5
    AR Pump Head

    Posted by Dan Rotlisberger on May 11, 2026

    Exactly as ordered. Quality build, as good as factory. FAST shipping.

AR 801940 Pump Head for AR252 Diaphragm Pump

AR 801940 Pump Head for AR252 Diaphragm Pump

MODEL: AR 801940

$47.99

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