Business Details
50+ Years
experience
Emergency
services
Reliable Plumbing & HVAC Services in Montclair, CA
Since 1973, Klaus & Sons has been a trusted family-owned plumbing, heating, and air conditioning contractor serving the Inland Empire. Our licensed and insured technicians provide 24/7 emergency services, specializing in residential and commercial plumbing, HVAC installation, and repair. With over 50 years of combined experience, we prioritize ongoing education to maintain industry-leading standards. Our state-of-the-art techniques ensure durable solutions for services like water heater repair, gas line maintenance, and energy-efficient HVAC systems.Backed by a 100% satisfaction guarantee, we serve Montclair, Upland, Chino Hills, and surrounding areas, treating every client like family. Fully licensed under CSLB# 320990, we emphasize safety, transparency, and reliability, earning consistent five-star reviews for prompt, courteous service and meticulous cleanup.
Services
Plumbing Services
24-Hour Plumbing
Toilet Repair
Gas Line Repair
Hot Water Heater Repair
HVAC Services
Air Conditioning Installation
Heating Repair
Commercial Plumbing
Emergency Plumbing
Details
- Year established: 1973
Highlights and features
- We offer 24/7 emergency plumbing and HVAC services with rapid response times.
- Our NATE-certified technicians undergo continuous training for industry-leading expertise.
- Fully licensed (CSLB# 320990) and insured with over 50 years of local experience.
- We guarantee 100% satisfaction on all installations and repairs.
- State-of-the-art technology ensures durable, energy-efficient solutions for every client.
Associations and certifications
- NATE
- Better Business Bureau
What people say
Excellent experience
Communicative and on time
Fair pricing
Knowledgeable staff
Wonderful service
Services
Plumbing Services
Our comprehensive plumbing services address leaks, clogs, and system replacements for residential and commercial properties. Technicians handle fixtures like faucets, toilets, and water heaters using advanced diagnostic tools. With 24/7 emergency availability, we ensure minimal disruption while maintaining code compliance and long-term durability for every repair or installation.
HVAC Installation
We specialize in installing energy-efficient heating and cooling systems, including furnaces, air conditioners, and smart thermostats. Our NATE-certified technicians ensure proper sizing and integration with existing infrastructure. Lennox product partnerships guarantee high-performance equipment, reducing utility costs while maintaining optimal indoor comfort year-round through precise temperature and humidity control.
Emergency Plumbing
Burst pipes, flooding, and gas leaks demand immediate attention. Our emergency team responds within hours to mitigate damage, operating 24/7 with no overtime charges. Rapid diagnostics identify root causes, from faulty valves to sewer line breaks. Temporary fixes and permanent solutions prioritize safety, preventing future emergencies through proactive system evaluations.
Water Heater Repair
We service all water heater types, including traditional tanks and tankless models. Common repairs address heating elements, thermostats, and sediment buildup. Annual maintenance extends unit lifespan while optimizing energy efficiency. Emergency replacements ensure uninterrupted hot water access, with expert guidance on upgrading to energy-saving models for long-term cost reduction.
Gas Line Repair
Licensed technicians inspect and repair gas lines for leaks, corrosion, or pressure issues. We use non-invasive detection methods to locate faults without property damage. Replacements follow strict safety codes, ensuring proper ventilation and connection integrity. Regular inspections prevent hazardous leaks while maintaining appliance efficiency for stoves, heaters, and outdoor equipment.
Questions
What areas do you service?
We serve Montclair, Upland, Chino Hills, Ontario, Rancho Cucamonga, Claremont, Fontana, and surrounding Inland Empire communities.
Are you available for emergencies?
Yes, our 24/7 emergency team responds promptly to plumbing and HVAC crises with no overtime fees.
Do you offer financing options?
Yes, we provide flexible financing for installations and major repairs to accommodate budget needs.
Are your technicians certified?
All technicians hold NATE certification and undergo continuous training for industry-standard expertise.
What warranties do you provide?
We offer a 100% satisfaction guarantee on all services and manufacturer warranties for installed equipment.
How can I schedule service?
Call 909-982-5698 anytime or use our online form for emergency or routine service requests.
Reviews (2)
Debbie Stotts Valera
Dec 19, 2016
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I have always called Klaus & Son, very dependable and reasonable. On time, great work and treat you like you are family. They are the best if your wanting to establish a good company to take care of things from plumbing - ac etc.
Bobbi Brasfield
Dec 06, 2016
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I would like to give a huge THANK YOU to Morino for the BEST customer service I have ever had! My heater wasn't working, Morino was there in minutes! He checked everything and made sure everything worked properly before he left.
