The heart of your water system is the well. The type, location, depth, size and material are all specific to your needs. We have knowledgeable solutions when foot by foot conditions change. This expertise is the reason Les Petersen Drilling has excelled for 75 years. We use the most advanced air rotary drilling rigs to drill wells for domestic, agricultural, and municipal use. Our rigs are capable of drilling over 1,000 ft deep, and through any formation the local geology has to offer. Along with these rigs we provide a full team of personnel and equipment to support every logistical drilling need.

Installation        

Design, planning and installation are seamlessly integrated at Petersen. Every build is specific to each customer. Tell us your need and we will make it happen.

Our knowledge of water systems is proven through efficiency and reliability. We employ highly trained and well-rounded pump technicians who can cover a wide range of jobs and troubleshooting including electrical, and plumbing. 

We've learned a thing or two in 74 years.

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Maintenance

All systems need service to maintain efficient operation. Many costly system damages can be averted by a simple technician inspection.

We provide:  

-24/7 emergency service

-Scheduled yearly inspections

-Pre-frost system checks

-System winter weatherization

-Spring startup inspections

Electrical

Most pump systems are now driven by electricity. We install all electrical connections needed for most power water systems. Our expertise includes three phase and single phase, power poles, meter panels, and pump control panels. We work on both overhead and underground systems. 

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Plumbing

We provide underground and aboveground plumbing services for water systems. Be it PVC, galvanized, ductile iron or copper, we design efficient pipe and control systems to move water to where you need it. Our personnel are expert plumbers, backed with tools and materials to complete every job presented to them. 

Treatment

Our GPM Petersen filtration division employs specialists who install and maintain water treatment systems of all sizes including softeners, iron and manganese filters, reverse osmosis, ozone, chlorination, and ultraviolet purifiers.

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We use only the best products available and stock a full line of parts and materials to keep your systems up and running. We also maintain water testing capabilities. For more information visit GPM Petersen

Filtration 

We sell a wide range of water filters. These filters range from simple screen filters to automatic self flushing screen, sand media and disk type filters for your domestic, agricultural, municipal, commercial applications.

Filters range in size from 3/4″ to 36″ as required for your application.

We provide and install storage tanks for water supply and fire protection. We are an authorized dealer for installation from ground prep to system connections of all sizes of storage tanks.

Example sizes include:

• 300 to 10,000 gallon Polyethylene storage tanks

• 5,500 to 10,500 gallon concrete storage tanks

• 150,000+ gallon steel storage tanks

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While Sonoma country produces a great climate for agricultural growing it also consists of a frost season. Exceeding all other weather related phenomena, Frost contributes to the most losses in the United States.

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To combat frost, we install and maintain two different types of active frost protection systems;

- Sprinkler pump systems ​

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These systems consist of water pumps to move a high volume of water to over plant sprinklers and need to be reliable. 

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- Wind machines

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Wind machine service is very specialized and few maintain the capability.

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We are an authorized dealer of Chinook wind machines

In head to head tests with competitor products, Chinook machines move more air for better crop protection.

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We provide, install and service a wide range of engines for water systems and wind machines. Our diesel, propane and gas engines range anywhere from 20 Hp to 500 Hp. Engine driven pumps, both well turbine and booster, require installation with technical precision. From the mounting to the fine tuning of pumping, We have the expertise and experience to get the job done right!