Merrill PCM4410U 4" Galvanized Steel Pitless Control Unit w/ Watertight Cap & Plate, 4' Bury Depth, No Tank, 1-1/4" Discharge

Overview

This integrated water well access solution, the Merrill PCM4410U 4" Galvanized Steel Pitless Control Unit with Watertight Cap & Plate, is designed for efficient and protected control of submersible well systems at a 4-foot bury depth, offering streamlined access and advanced system protection in one unified structure.

Replacing complex and exposed external well control assemblies, this all-in-one unit houses constant pressure controls, electrical components, and discharge fittings inside the well casing—minimizing installation time and eliminating the need for separate above-ground boxes or junctions.

Water system installers, contractors, and pump technicians benefit from the watertight universal top plate, corrosion-resistant galvanized steel construction, and internal space designed to accommodate variable frequency drives (VFDs) and constant pressure controls for smart pump management.

Compatible with 4" casing installations and equipped with a 1-1/4" discharge outlet, the PCM4410U is ideal for residential, agricultural, and light commercial well systems where clean, protected, and centralized control is essential. The compact, tankless design simplifies installation while safeguarding electrical and hydraulic components below grade.

Key Features

• All-in-One Well Control Unit: Combines control access, discharge connection, and protection in a single underground housing system.
• 4' Bury Depth: Designed for standard installation at 4 feet below grade for frost protection and regulatory compliance.
• Watertight Universal Plate: Allows for easy VFD and constant pressure controller mounting inside the top of the casing while sealing out moisture and debris.
• 1-1/4" Discharge Connection: Compatible with most standard residential and farm pump system plumbing setups.
• Galvanized Steel Construction: Provides excellent corrosion resistance and long-term durability in underground environments.

Specifications

Product Type: Pitless Control Unit

Material: Galvanized Steel

Casing Size: 4"

Bury Depth: 4'

Tank Included: No

Discharge Size: 1-1/4"

Top Plate Type: Watertight Universal Cap & Plate

Control Compatibility: VFD, Constant Pressure Controller

Installation Orientation: Vertical, Underground

Corrosion Resistance: Yes

Pressure Rating: N/A

Weight: N/A

Applications

Ideal for pump installers, water system contractors, and property owners installing or upgrading a well system for residential homes, agricultural operations, or small commercial facilities. The PCM4410U is especially useful where clean electrical routing, simplified control installation, and tamper-resistant configurations are critical for long-term serviceability.

Performance and Characteristics

By housing critical components internally, this unit shields electrical controls from environmental wear and mechanical damage. The galvanized steel casing withstands burial conditions and minimizes corrosion. Its watertight design helps ensure system longevity, while the universal mounting plate streamlines VFD integration—reducing troubleshooting time and improving system efficiency.

Streamline your well system with one unified solution—install the Merrill PCM4410U Pitless Control Unit today!

Protect your pump system from the elements—shop the Merrill PCM4410U with watertight cap and plate now!

Optimize water control and simplify installation—get the Merrill PCM4410U 4" Pitless Control Unit today!