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STA-RITE MSC-6 - User Manual

STA-RITE MSC-6
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OWNER’S MANUAL
Multi-Stage Deep Well Jet Pumps
20
100
80
60
40
©2001, Sta-Rite Industries, Inc. PRINTED IN U.S.A. S757-1 (Rev. 10/31/01)
293 Wright Street, Delavan, WI 53115
“MS” Series
Installation/Operation/Parts
For further operating, installation, or maintenance assistance:
Call 1-262-728-5551

Table of Contents

Questions and Answers

  • T
    Tiffany FoleyAug 7, 2025
    How to fix a STA-RITE MSC-6 Water Pump motor that won't start?
    • M
      Melissa MayAug 7, 2025
      If your STA-RITE Water Pump motor isn't running, start by checking if the disconnect switch is on. Then, see if a fuse is blown or a circuit breaker has tripped and replace the fuse or reset the breaker if needed. Also, the starting switch might be defective, in this case disconnect the power and replace the starting switch. Loose, disconnected, or incorrectly wired wires at the motor could also be the cause; disconnect the power and check and tighten all wiring. Lastly, dirty pressure switch contacts can prevent the motor from running; disconnect the power and file the contacts with an emery board or nail file.
  • R
    Robert WoodAug 16, 2025
    Why am I getting air spurts from the faucets with my STA-RITE Water Pump?
    • J
      Jay GoodmanAug 16, 2025
      If you're experiencing air spurts from your faucets with your STA-RITE Water Pump, it could be due to several reasons. The pump might be picking up prime; when it has picked up prime, it should pump solid water with no air. There could be a leak in the suction side of the pump; check joints for leaks with soapy water. The well itself might be gaseous; consult the factory about installing a sleeve in the well. Or, intermittent over-pumping of the well might be occurring, where water is drawn down below the foot valve; lower the foot valve if possible, otherwise restrict pump discharge.
  • D
    Dr. Timothy GomezAug 22, 2025
    Why is my STA-RITE Water Pump not delivering water to full capacity?
    • K
      Kevin MaloneAug 22, 2025
      If your STA-RITE Water Pump isn't delivering water to its full capacity, it could be because the water level in the well is lower than estimated; a deep well jet may be needed if your well depth to water is more than 25’ (7.6M). If you're using steel piping, it might be corroded or limed, causing excess friction; replace it with plastic pipe where possible, or with new steel pipe. Also, the offset piping might be too small in size; use larger offset piping.
  • R
    Richard HallAug 27, 2025
    Why does my STA-RITE Water Pump motor run hot and the overload keeps tripping?
    • O
      ohillAug 27, 2025
      If your STA-RITE Water Pump motor runs hot and the overload kicks off, it could be due to a few reasons. The motor might be wired incorrectly; refer to the wiring instructions. The voltage could be too low; check with the power company. Also, the pump might be cycling too frequently; see the section on too frequent cycling.
  • P
    pjohnsonNov 1, 2025
    Why does my STA-RITE MSC-6 Water Pump keep cycling on and off?
    • D
      dscottNov 1, 2025
      Your STA-RITE Water Pump might be cycling too frequently due to several reasons. The pressure switch may be out of adjustment or have welded contacts—disconnect power and adjust or replace it. Faucets might be left open, so ensure they are closed. A clogged venturi, nozzle, or impeller can also cause this, so clean them. The water level in the well could be lower than estimated; consider a deep well jet pump. A waterlogged standard pressure tank without an air cushion can also be the issue, so drain the tank to the air volume control port. Check all connections for air leaks, and replace any leaking foot valves. Finally, the air charge in a pre-charged tank might be too low. Use a tire pressure gauge to check the air pressure at the valve stem. If it's less than the pressure switch cut-in ...
  • J
    Jesse FoleyNov 10, 2025
    What to do if my STA-RITE MSC-6 motor runs but no water comes out?
    • M
      Mark VegaNov 10, 2025
      If your STA-RITE Water Pump motor runs but no water is delivered, the pump in a new installation might not have picked up its prime; re-prime it according to the instructions. Check all connections on the suction line, AVC, and ejector for air leaks using soapy water or shaving cream. A leaking foot valve or check valve can also be the problem, so replace them if necessary. The pump might have lost prime through air leaks or the water level being below the suction pipe inlet; check all connections on the suction line and shaft seal. Ensure the foot valve or strainer isn't plugged by cleaning it. Also, check if the ejector or impeller is plugged and clean them. A stuck check valve or foot valve can prevent water delivery, so replace them if needed. Frozen pipes can also stop water flow, so ...

Summary

Safety

Read and Follow Safety Instructions

Crucial guidance on understanding safety alerts and warnings in the manual.

Electrical Safety

Specific safety measures related to electrical hazards and connections.

General Safety Precautions

Overall safety precautions for operating and maintaining the pump.

Installation

Before You Install Your Pump

Key preparatory steps and considerations before pump installation.

Shallow Well;Centrifugal Installation

Specific instructions for installing shallow well or centrifugal pump types.

Installation Details

Piping in the Deep Well

Detailed instructions for piping setup in deep well installations.

Plastic Pipe Installation - Double Pipe

Guidance on installing double pipe systems using plastic piping.

Installation Procedures

Single Pipe Ejector Installation

Specific instructions for installing single pipe ejector systems.

Discharge Pipe Sizes

Recommendations for selecting appropriate discharge pipe sizes to optimize flow.

Pressure Tank Installation

Pressure Tank Installation - Deep Well

Steps for installing the pressure tank in a deep well system.

Standard Tank Connection

How to connect a standard pressure tank with an air volume control.

Precharged Tank Connection

How to connect a precharged pressure tank, which requires no air control.

Electrical Connections

Critical Safety: Disconnect Power

Critical safety warning to disconnect power before any electrical work.

Motor Wire Connections

Instructions for connecting motor wiring to the terminal board.

General Wiring Connections

General guidelines and code compliance for wiring the pump system.

Electrical Wiring Chart

Electrical Connection Procedure

Step-by-step procedure for making electrical connections.

Recommended Wire and Fuse Sizes

A chart detailing recommended wire and fuse sizes based on motor HP and distance.

Pump Operation

Priming the Pump

Detailed instructions for priming the pump to ensure proper operation.

Advanced Operation

Handling a Gaseous Well

Methods for dealing with wells that contain gases, ensuring clean water delivery.

Air Control in Flowing Wells

Managing air control in flowing wells for standard tank systems.

Maintenance Procedures

Pump Disassembly and Assembly

Step-by-step guide for taking apart and putting back together the pump.

Installing a New Seal

Instructions for correctly installing a new pump seal.

Troubleshooting Guide

Motor Will Not Run

Steps to diagnose and fix issues when the motor fails to start.

Motor Runs Hot and Overload Kicks Off

Causes and solutions for an overheating motor tripping the overload.

Motor Runs But No Water Delivered

Troubleshooting steps for when the pump runs but does not deliver water.

Pump Does Not Deliver Water to Full Capacity

Diagnosing and resolving issues related to reduced pump output.

Pump Cycles Too Frequently or Not Shutting Off

Identifying causes for continuous pump operation or frequent cycling.

Air Spurts from Faucets

Troubleshooting air in the water supply and its causes.

Repair Parts List

Multi-Stage Jet Pump Parts

Detailed list and diagrams of multi-stage jet pump components.

Service Kits

Information on available service kits for pump maintenance and repair.

Component Parts Breakdown

Pressure Regulator Parts

Parts breakdown for the pressure regulator assembly.

Adapter Flange Parts

Parts list for the adapter flange, noting it's not part of the main pump.

Casing Adapters Parts

Parts list for casing adapters, noting they are separate components.

STA-RITE MSC-6 Specifications

General IconGeneral
CategoryWater Pump
Voltage115/230V
Hertz60 Hz
PhaseSingle
ModelSTA-RITE MSC-6

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