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Merrill MPS3050 Water Well Pressure Control & Air-Pump Pressure Switch, 30-50 PSI Pressure Setting, NEMA 1, Adjustable Differential,1/4' Female NPT

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$19.35

$ 8 .99 $8.99

In Stock

About this item

  • Standard water well pump replacement switch designed for use of electrically driven water well pumps of all types (Jets, Submersible, Reciprocating etc).
  • Cut-In Pressure 30 PSI - Cut-Off Pressure 50 PSI - Adjustable
  • Large contacts for longer servicing life open on rising pressure
  • Horsepower Rating (1-Phase) 2HP-115VAC
  • 1/4" Female NPT - Individaully Boxed - OEM Replacement Part



Product Description

Merrill MFG. Pressure Switch - Under Pressure? No Problem!

Merrill MFG. Pressure Switches Close-Up
Flip a Switch on Better Pressure

Merrill pressure switches are guaranteed to give you the best performance. Quality switches, excelling at what you need.

Merrill Pressure Switches

The 30/50 pressure switch signals the pump to start when the water system drops to a preset (e.g. 30 PSI) and stop at high pressure mark (e.g. 50 PSI). This switch is to be used with submersible well pumps or as a replacement switch. It can be wired 115 volt or 230 volt.

  • Water Pump Pressure Switch
  • Cut-In Pressure 30 PSI - Cut-Off Pressure 50 PSI - Adjustable
  • 1/4" Female NPT Connection
  • Easy Installation - OEM Replacement Part

Merrill MFG. Pressure Switch - Stronger Fiberboard Bracket

Adjustable Pressure

This 30/50 pressure switch has adjustable cut-in (30 PSI) and cut-off (50 PSI) pressures, with a removable cap for easy adjustment. It’s compatible with submersible pumps and can be wired for 115V or 230V, simplifying installation.

Merrill MFG. Pressure Switch - Longer Service Life

Durable Construction

The pressure switch features large silver contacts for a longer service life. The thicker, stronger heavy-duty contacts bracket ensures durability, allowing it to withstand movement, heat, and wear over time.

Merrill MFG. Pressure Switch - Heavy Brass Wire Connections

High-Quality Connection

Equipped with brass terminals and screws (not steel), this switch provides superior electrical conductivity and reduces the potential for corrosion, ensuring reliable and consistent performance.

Merrill MFG. Pressure Switch - 1/4 Inch Connection

Long-Lasting Service

The metal case is double plated with a light brass color for enhanced durability, withstanding heat and corrosion. The 1/4" female NPT connection and up to 2HP-115/230VAC horsepower rating ensure strong performance in demanding conditions.

Preset On (PSI) 20 PSI 30 PSI 40 PSI 50 PSI 30 PSI 30 PSI
Preset Off (PSI) 40 PSI 50 PSI 60 PSI 70 PSI 50 PSI 50 PSI
Build Type N/A N/A N/A N/A Heavy-Duty Manual Lever
Connection Type 1/4" Female NPT 1/4" Female NPT 1/4" Female NPT 1/4" Female NPT 1/4" Female NPT 1/4" Female NPT
Weight 9.6 lbs 9.6 lbs 9.6 lbs 9.6 lbs 9.0 lbs 1.0 lbs

Joe
2025-09-04 16:25:38
Replaced a sticking pressure switch. Maintained proper pressure within a few psi. Does not come with pressure line to pump. I picked one up at tractor supply.
Wilrob
2025-07-01 16:00:29
What else can I say but great price and great product. Less than half the price of the OEM One and it works just fine.
Lynn A.
2025-06-22 16:02:49
Working Good. Good Value.
Customer
2025-06-14 12:55:33
Looks is like they thought it out very well on how to build a pressure switch
The Scrivener
2025-05-21 12:31:35
I needed a new switch because when replacing the last one I accidentally grabbed the wrong type of switch off the shelf at Ace -- that is, the kind with the little arm on it that stops the pump from coming on when the pressure tank pressure drops below 10 lbs. Don't get that kind unless you understand what it's for.This switch LOOKS great, with brass contacts and screws, distinctly better than the usual Square D version. II have great hopes of never having to replace it.
Stevo
2025-04-09 14:58:14
This part was a perfect replacement for the well pump switch that had finally started showing signs of wear after about twenty years. Hopefully the new one will last at least as long, and I’ll be very happy of it does…
Gary
2025-03-07 18:36:53
Great fit
Richard JP
2025-03-01 18:40:25
Publican manufactura en Iowa USA y entregan productos chinos de dudosa calidad.
CET
2025-02-01 13:10:20
L’appareil fonctionne dans la marge établie et conserve cette spécification dans un usage à long terme
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