If the pump is shut off due to low pressure how can it be restarted?

Turn the power off for a moment then back on

I have a 2hp pump, can you recommend a relay?

Assuming that's a 220 volt pump 2 hp at 85% efficiency is about 8 amps. A 10 amp DPDT 8 pin relay is very common. They come with wiring diagrams usually.

Is this sutable for 12 gauge wire?

It’s been 3 months now since installation with no problems ! I Replaced a Merrill mechanical pressure switch which had the pump and power lines enclosed within it ! Along with one of the reviews that suggested plumbing reduction fittings, I had to add a Junction Box for the electrical wiring to house the 220 volt line and the line from the pump. I set the pressures for Low 55 # and Hi at 70 #. Will post in summer how it handles water pressure with the lawn irrigation.

What is the correct wiring of the unit? Since no mention of the color coding is available. A diagram w/colors would be helpful.

Only color that matters is the green/yellow wire is ground. Other 2 are your 2 hot lines (110, 115, 120V) each leg. They are labeled on the back for power in, and switched power out.

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GamaTech Pressure Switch for Water Pump and Air Pump, Digital Adjustable Pres...

GamaTech Pressure Switch for Water Pump and Air Pump, Digital Adjustable Pres...

Product ID: 505050347

Details

Brand
Generic
Color
Yellow Casing
Global Trade Identification Number
Horsepower
1.5 hp
Item Weight
9.6 ounces
Material
Brass Plastic

⚡220V AC power supply

💧0-230 PSI adjustable pressure range

🔧1/2 inch true NPT threaded connector

799 kr

Duties & taxes included

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Sold byAmazon DenmarkDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

💡 Upgrade your pump game with smart precision and unbeatable protection!

LONG LASTING DURABILITY - Over 20 million start/stop cycles guarantee years of hassle-free service—built to keep up with your demanding projects.
UNIVERSAL COMPATIBILITY - Seamlessly fits any 1.5HP or smaller water and air pumps with true 1/2 inch NPT threading—plug and play confidence.
BUILT IN PUMP PROTECTION - Automatic shutoff prevents costly pump burnout during water shortages—smart safety for your investment.
PRECISION DIGITAL CONTROL - Adjust pressure settings effortlessly with a clear digital display—no guesswork, just perfect pump performance.
RUGGED IP 66 WATERPROOF DESIGN - Engineered to withstand harsh environments, ensuring reliable operation rain or shine.

The GamaTech 220V 230PSI Pressure Switch is a digitally adjustable, highly durable pressure controller designed for US/Canada markets. Featuring a true 1/2 inch male NPT connector, it supports pumps up to 1.5HP and offers automatic pump shutoff to prevent damage during water shortages. With an IP66 waterproof rating and over 20 million start/stop cycles, it delivers reliable, maintenance-free performance for residential, commercial, and industrial water and air pump systems.

Specifications

ASIN	B0BS1SX94W
Best Sellers Rank	#214,139 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #185 in Pressure Switches
Brand	Generic
Brand Name	Generic
Color	Yellow Faceplate, Green/Black Casing
Customer Reviews	4.1 out of 5 stars 46 Reviews
Global Trade Identification Number	00196852007660
Horsepower	1.5 hp
Included Components	Pressure controller, user manual
Item Dimensions L x W x H	6"L x 3.5"W x 3"H
Item Type Name	Pressure Switch for Water Pump and Air Pump, Digital Adjustable Pressure Controller
Item Weight	9.6 ounces
Manufacturer	Gama Technologies
Manufacturer Part Number	GTSWF-220V230PSI
Manufacturer Warranty Description	1 year
Material	Brass , Plastic
Material Type	Brass, Plastic
Model Number	GTSWF-220V230PSI
Number of Items	1
Power Source	AC
Product Dimensions	6"L x 3.5"W x 3"H
Product Style	Pressure controller
Specific Uses For Product	Residential/Commercial/industrial
Style	Pressure controller
UPC	196852007660
Unit Count	1 Count
Voltage	220 volts

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