Monarch NSPHE-S100 Series Sprinkler Pump with 1 HP High Service Factor Motor, Cast Gray Iron Housing, Noryl Glass-Filled Impeller, and Built-In Check Valve

Monarch NSPHE-S100 Series Sprinkler Pump & Repair Parts

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Monarch NSPHE-S100 Series Sprinkler Pump and Repair Parts

Monarch NSPHE-S100 Series Sprinkler Pump is the foundational model of the NSPHE Series, offering reliable performance for homeowners needing a dependable 1 HP solution for lawn and garden irrigation. Designed for efficiency and longevity, this self-priming pump is capable of delivering the high capacities required for residential turf sprinkling while remaining energy efficient throughout the season.

Encased in a rugged cast gray iron housing, the Monarch NSPHE-S100 Series Sprinkler Pump is built to resist environmental wear. Inside, it features a precision-engineered Noryl glass-filled impeller. This lightweight, smooth-surface impeller ensures maximum water flow efficiency and is highly resistant to corrosion and scale buildup, a common issue found in standard metal impellers.

The unit is powered by a high service factor 1.65 SF square flange motor equipped with thermal overload protection. This safety feature automatically shuts the pump down to prevent burnout if it overheats, ensuring years of trouble-free service. With a built-in check valve to hold prime, the Monarch NSPHE-S100 is a dependable and low-maintenance solution for your residential irrigation needs.

Key Features

  • 1 HP Single Phase Motor: Dual voltage (115/230V) square flange motor designed for continuous duty with a high service factor.
  • Thermal Overload Protection: Built-in safety mechanism protects the motor from overheating and burnout.
  • Noryl Glass-Filled Impeller: Provides superior hydraulic efficiency and corrosion resistance compared to standard plastic.
  • Self-Priming Design: Features a large pump body and integral suction check valve for fast priming and prevention of backflow.
  • Mechanical Seal: Self-lubricating and self-adjusting seal requires zero maintenance.
  • Easy Installation: Standard 1½” NPT suction and discharge ports fit most residential piping systems.

Applications

  • Residential Lawn Sprinkling: Ideal for small to medium-sized lawns requiring consistent pressure.
  • Garden Irrigation: Perfect for powering drip systems and soak hoses.
  • Water Transfer: Efficiently moves water from shallow wells, lakes, or cisterns.

Technical Specifications

Model Suction Discharge CP D E F G H L O S Y Z ZO
NSPHE-S100 1½” NPT 1½” NPT 18.31″ 5.62″ 2.75″ 3.00″ 6.00″ 0.44″ 6.31″ 11.87″ 4.12″ 5.56″ 2.50″ 8.12″

 

Performance Data

Capacities listed in U.S. Gallons Per Minute (GPM) based on discharge pressure at a 5 ft. lift.

Model No. HP 10 PSI 20 PSI 30 PSI 40 PSI Max. PSI
NSPHE-S100 1 54 44 32 17 45

Electric Motor Specifications

Model No. Order No. HP SF Voltage Phase Suct./Disch. Ship Wt.
NSPHE-S100 614436 1 1.65 115/230V 1 1½” x 1½” 56 lbs.

 

Repair Parts

Monarch NSPHE-S100 Series Sprinkler Pump showing cast gray iron housing, Noryl glass-filled impeller, built-in check valve, and 1 HP square flange thermal overload protected motor assembly

 

Ref. Code # Qty (S100) Description
1 433210 1 Casing – Blue
2 433137 1 Diffuser
3 433125 1 Impeller (Noryl)
4 433159 1 Seal Plate-Sq.Fl.
5 400111 1 Valve Body
6 190645 1 Valve Gasket
7 400079 1 Top Weight
8 174430 1 Bottom Weight
9 145860 1 Screw
10 191790 1 Flinger
11* 240104 1 Seal
12* 246238 1 Diffuser Ring
15 185620 1 Pipe Plug 1/4 NPT
16 193923 1 Gasket
17 120010 4 Hex HD. Bolt 3/8 UNC x 1
18 119990 10 Hex HD. Bolt 3/8 UNC x 7/8
19 204154 1 Motor 1 HP*1PH*115/230V.Sq.Fl.
20 120030 4 Bolt 3/8 UNC x 1-1/2
22 176230 6 Spring Washer 3/8
23 227830 4 Nut 3/8 UNC
25 140530 4 Cap Screw 3/8 UNC x 1/2
28 433161 1 Base Plate
29 185650 1 Pipe Plug 3/4 NPT

 

FAQs

Does the NSPHE-S100 have 115V or 230V connections?

The 1 HP motor on the NSPHE-S100 is dual voltage. It comes from the factory capable of being wired for either 115V or 230V single-phase power, depending on how you configure the motor terminal board.

Is the Monarch NSPHE-S100 pump self-priming?

Yes, the NSPHE-S100 is a self-priming pump. It features a large cast iron housing and a built-in suction check valve that retains water in the casing, making re-priming automatic after the initial fill.

What is the impeller made of on the S100 model?

The NSPHE-S100 uses a Noryl glass-filled impeller. This durable thermoplastic material is chosen for its smooth surface finish (increasing efficiency) and its high resistance to corrosion.

Does this pump require a foot valve?

While the pump has a built-in check valve, installing a foot valve at the end of the suction line is still recommended for deep lifts to ensure the suction line stays full of water, reducing strain on the pump.