Merrill APC4 4" APC Pitless Connector (Ductile Iron)

Overview

This heavy-duty pitless conversion fitting, the Merrill APC4 4" APC Pitless Connector, is engineered to provide a reliable transition between threaded pitless units and plain-end well casings in municipal, agricultural, and deep-well installations.

Replacing traditional welded or threaded adapters, the APC4 allows seamless connection to 4" casing without field welding or complex fittings, streamlining installation and minimizing downtime.

Water well contractors, pump installers, and rural utility professionals benefit from the strength and corrosion resistance of ductile iron construction, combined with a precision-sealing neoprene gasket and a rugged clamping ring for secure mechanical engagement.

Ideal for pitless unit installations where threaded male pitless bodies must be connected to plain-end well casing, this connector eliminates the need for specialized casing threads. Its 4" casing compatibility, ductile iron components, and stainless hex bolts ensure a dependable, leak-free joint that stands up to soil pressure, frost heave, and groundwater exposure.

Key Features

• 4" Pitless to Plain-End Casing Connection: Provides a secure and field-proven transition from threaded pitless units to non-threaded well casing.
• Durable Ductile Iron Construction: Coupling and clamping ring are cast from high-strength ductile iron for long-term underground service.
• Neoprene Gasket Seal: Forms a tight, water-resistant seal between the pitless and casing for system integrity.
• Mechanical Clamping Ring: Locks the connection in place with even compression around the casing.
• Includes Heavy-Duty Hex Bolts: 1/2" x 3" hex head bolts ensure strong mechanical fastening under load.

Specifications

Product Type: APC Pitless Connector

Material (Coupling): Ductile Iron

Material (Clamping Ring): Ductile Iron

Seal Type: Neoprene Gasket

Casing Compatibility: 4" Plain-End Casing

Pitless Compatibility: Threaded Male Pitless Units

Bolt Size: 1/2" x 3" Hex Head Bolts

Installation Orientation: Vertical (Well Casing)

Corrosion Resistance: Yes (with protective coating)

Pressure Rating: N/A

Weight: N/A

Applications

Engineered for water well drillers, pump service technicians, and rural water system contractors, the APC4 is ideal for retrofits, conversions, and new installations where a threaded pitless unit must be mounted to a non-threaded 4" casing. Commonly used in municipal wellheads, deep residential systems, and agricultural pump installations.

Performance and Characteristics

The Merrill APC4 offers robust mechanical retention, high axial load resistance, and excellent sealing in underground environments. Its ductile iron build resists deformation, and the neoprene gasket performs reliably across temperature and moisture changes. The clamping system distributes force evenly around the casing, reducing stress points and extending system life.

Upgrade your pitless system with field-proven strength—install the Merrill APC4 Connector today!

Reliable connections made easy—shop the Merrill APC4 4" Pitless Connector now!

Secure your wellhead with confidence—choose the Merrill APC4 for your next installation today!