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Business Details
23 Years
experience
Emergency
services
Your Trusted Partner for Plumbing & HVAC Solutions
Established in 2003 by Jay Morthland and Joe Stithem, MO-ST Plumbing & Mechanical has grown from a small operation with limited resources to a 25-person team serving northern Illinois. Our founders brought decades of industry experience to create a company focused on exceptional customer service and quality craftsmanship at fair prices. Over the years, we expanded our capabilities by adding HVAC and commercial refrigeration divisions, allowing us to address diverse mechanical needs.

Our commitment to continuous improvement drives us to invest in cutting-edge technology and training while maintaining the same dedication to reliability that defined our early days. With two commercial locations and a team of experts, we handle projects of all sizes across residential, commercial, and industrial sectors in Sauk Valley and surrounding areas.
Services
Plumbing HVAC Commercial Refrigeration Heating & Cooling Emergency Services
Details
  • Year established: 2003
Highlights and features
  • We offer 40+ years of combined plumbing industry experience
  • Our team provides 24/7 emergency service availability
  • Locally owned and operated since 2003
  • We maintain current technology and training certifications
  • Our HVAC division services complete heating and cooling systems
What people say
Super thankful for Jay taking care of us! Prompt and very courteous Professional and courteous Highly recommend MOST Reasonable price
Services
Plumbing
Our comprehensive plumbing services cover installation, maintenance, and repair of residential and commercial water systems. We handle emergency leak repairs, pipe replacements, and fixture installations with certified technicians using modern diagnostic tools. With 20+ years of field experience, our team ensures code-compliant solutions that maximize system longevity and efficiency.
HVAC
We design and maintain heating, ventilation, and air conditioning systems for optimal indoor comfort. Our HVAC division offers complete system installations, seasonal maintenance, and emergency repairs using energy-efficient equipment. Certified technicians perform thorough diagnostics to identify issues affecting system performance and indoor air quality.
Commercial Refrigeration
Our specialized refrigeration team services industrial and commercial cooling equipment for food service and storage facilities. We handle system design, component replacement, and temperature control optimization. With proper licensing and technical training, we ensure compliance with health and safety regulations while minimizing operational downtime.
People
Jay Morthland
Co-Owner
With 20+ years in the plumbing industry, Jay co-founded MO-ST in 2003. He oversees daily operations and emergency service coordination while maintaining hands-on involvement in complex installations.
Joe Stithem
Co-Owner
Bringing equal industry experience, Joe co-established MO-ST's reputation for quality. He manages equipment investments and technician training programs to ensure adherence to evolving technical standards and safety protocols.
Questions
What service areas do you cover?
We serve Rock Falls, Dixon, and the entire Sauk Valley region for residential and commercial plumbing, HVAC, and refrigeration needs.
Do you offer emergency services?
Yes, we provide 24/7 emergency response for urgent plumbing, heating, and cooling issues with technicians available at all times.
What HVAC services do you provide?
Our HVAC division handles complete system installations, seasonal maintenance, refrigerant management, and emergency repairs for residential and commercial properties.
Are financing options available?
We currently accept standard payment methods but do not offer in-house financing programs for service installations or equipment purchases.