Antioch plumbing services
Tankless water heaters can deliver hot water on demand, but proper sizing matters. In Demand Plumbing, Heating & Air provides tankless water heaters services in Antioch.
Serving homeowners across the East Bay with tankless water heater service, replacement and installation.
Local service information
We review simultaneous fixture use, fuel or electrical supply, venting, and water conditions. For Antioch homeowners, the most useful recommendation starts with the condition of the actual system rather than assumptions about the neighborhood. A tankless conversion may require changes beyond simply removing the old storage tank. We serve homeowners in Dallas Ranch, Prewett Ranch, and other Antioch neighborhoods, with service focused on the actual plumbing or HVAC issue.
Dallas Ranch, Prewett Ranch, and Country Hills are local residential areas or corridors in Antioch. Antioch has older residential streets near Rivertown as well as later subdivisions along the Lone Tree and Deer Valley corridors.
Tankless work considers gas or electrical capacity, venting, water quality, and maintenance access. For appointments near Dallas Ranch and Prewett Ranch, access and existing system condition help determine the appropriate next steps.
When to get help
Our approach
Equipment selection considers the hot-water demand and the conditions at the home. Energy supply, venting where applicable, placement and water conditions can affect a tankless installation. For an existing system, describe any error indications and performance changes when arranging service. We review the findings before recommending work.
Describe the issue and any previous work when arranging your appointment. We explain the findings and proposed scope so you can make an informed decision.
See our work
Real work from In Demand Plumbing, Heating & Air. Explore actual repairs, installations and other completed projects from our service areas.
Concord, CA · Completed project
Replaced an existing Rheem water heater with a new 40-gallon Bradford White gas water heater at a home in Concord, CA.
View full project
Planning a tankless system
We consider how much hot water the household uses and when that demand typically occurs.
Energy supply, venting, placement and water conditions can affect a tankless installation.
We explain equipment sizing, supporting work and the installation scope before moving forward.
Products & Equipment
Explore equipment associated with this service. Our team can help determine which options suit your home.
Navien · NPE-240A2
The Navien NPE-240A2 is a premium high-efficiency condensing tankless water heater designed to deliver continuous hot water on demand. Featuring a 0.95 Uniform Energy Factor (UEF), dual stainless steel heat exchangers, and Navien's exclusive ComfortFlow®…
The Navien NPE-240A2 is a premium high-efficiency condensing tankless water heater designed to deliver continuous hot water on demand. Featuring a 0.95 Uniform Energy Factor (UEF), dual stainless steel heat exchangers, and Navien's exclusive ComfortFlow® technology, this advanced system combines energy efficiency with dependable hot water performance.
Its built-in recirculation pump and buffer tank help reduce the wait for hot water when properly configured. With a compact wall-mounted design, the NPE-240A2 saves valuable floor space compared with traditional tank-style water heaters.
In Demand Plumbing, Heating & Air provides professional Navien tankless water heater installation, replacement, and service throughout its service area.
Navien NPE-240A2 Residential Limited Warranty: - Heat Exchanger: 15 years - Parts: 5 years - Labor: 1 year These warranty periods apply to qualifying residential installations with standard or controlled recirculation. For residential systems using uncontrolled recirculation, coverage is reduced to 5 years for the heat exchanger, 3 years for parts, and 1 year for labor. All warranties are subject to Navien's applicable terms, installation requirements, operating conditions, and exclusions. Coverage is provided by the manufacturer and is not an additional warranty from In Demand Plumbing, Heating & Air.
Zilmet · ZEP-1
The Zilmet ZEP-1 is a compact stainless steel expansion tank designed to help protect tankless and point-of-use water heating systems from excessive pressure caused by thermal expansion. Constructed entirely of 304 stainless steel, the ZEP-1 features a…
The Zilmet ZEP-1 is a compact stainless steel expansion tank designed to help protect tankless and point-of-use water heating systems from excessive pressure caused by thermal expansion.
Constructed entirely of 304 stainless steel, the ZEP-1 features a serviceable air charge, a butyl diaphragm, and a factory precharge of 50 PSI. Its compact design allows installation on the cold-water supply line in approved configurations.
Designed for water heaters with a total water volume of 2 gallons or less, the ZEP-1 helps protect heat exchangers, piping, and plumbing connections by absorbing pressure increases within the system.
Navien · NaviCirc (verify accessory part number)
The Navien NaviCirc™ Recirculation Valve is designed to reduce the wait for hot water in homes without a dedicated hot water recirculation return line. When paired with a compatible Navien NPE-A2 tankless water heater, including the NPE-240A2, the NaviCirc…
The Navien NaviCirc™ Recirculation Valve is designed to reduce the wait for hot water in homes without a dedicated hot water recirculation return line.
When paired with a compatible Navien NPE-A2 tankless water heater, including the NPE-240A2, the NaviCirc uses the home's existing cold water piping as a temporary return path. The tankless water heater's built-in recirculation pump moves warm water through the plumbing system, helping deliver hot water to fixtures more quickly.
The valve automatically stops crossover circulation when the water temperature reaches approximately 95°F. Its compact design allows installation beneath an accessible fixture, typically one of the farthest from the water heater.
In Demand Plumbing, Heating & Air installs compatible Navien tankless water heater recirculation solutions to improve convenience and reduce unnecessary water waste while waiting for hot water.
Navien NaviCirc Recirculation Valve — 3-Year Manufacturer Warranty. Navien lists a 3-year warranty for the NaviCirc valve. Coverage is subject to applicable manufacturer warranty terms, installation requirements, and exclusions.
Current offers
$25 off
Save $25 on your next plumbing service with In Demand Plumbing, Heating & Air! Whether you need plumbing repairs, drain cleaning, water heater service, or other plumbing work, take advantage of this special offer. Cannot be combined with other offers, coupons, or discounts.
Offer ends: December 31, 2027
Cannot be combined with any other offers, coupons, promotions, or discounts.
$200 off
Save $200 on the installation of a new tankless water heater or heat pump water heater with In Demand Plumbing, Heating & Air. Upgrade your home's hot water system with an energy-efficient solution and enjoy professional installation at a great value.
Offer ends: December 31, 2027
Valid toward the installation of a new tankless water heater or heat pump water heater only. $200 discount applies to the installation invoice. Cannot be combined with any other offers, coupons, promotions, or discounts.
5% off
At In Demand Plumbing, Heating & Air, we appreciate our senior community! Customers aged 65 and older receive 5% off their entire plumbing, heating, or air conditioning job, including labor, materials, and equipment. From everyday repairs to complete system installations, we're proud to help seniors save on home comfort services.
Offer ends: December 31, 2027
Valid for customers aged 65 or older. Discount applies to the entire job invoice, including labor, materials, and equipment. Proof of age may be required. Cannot be combined with any other offers, coupons, promotions, or discounts.
We install it. We stand behind it.
Our installation guarantees explain how we stand behind eligible equipment installations and respect your home during the work.
We stand behind our craftsmanship for the life of the equipment we install.
If you’re not comfortable with the performance of your new system, we’ll make it right.
The price we agree on is the price you pay. No surprise labor charges.
We respect your home like it’s our own. We protect your property and clean our work area when we’re finished.
Done right. Tested right. Explained right. Every system is installed to code, started, tested and walked through with you.
Lifetime Labor Guarantee requirements: Equipment must be installed by In Demand Plumbing, Heating & Air; the Home Protection Plan must remain active without interruption; and required maintenance must be completed as scheduled. Guarantees apply to eligible work and are subject to their full terms.
Read the complete Comfort Guarantee terms →Home protection plans
Explore ongoing maintenance and member benefits for your home. Choose the coverage that fits your needs.
$14.95/month
$24.95/month
Plan benefits and services are subject to the applicable membership terms. The Comfort Guarantee and maintenance plan eligibility are not identical.
Your questions
Not necessarily. Supply, venting and placement requirements can differ. We review the property and include any necessary changes in the proposed scope.
Yes. Explore our service areas or contact our team about your property address.
Related services
Customer voices
★★★★★
In addition to detecting hidden leaks, the leak detector Daniel installed is going to reduce our homeowner’s insurance premium. We appreciated his expertise and his well-stocked truck so that the house and the sprinkler system flows were separate. He was polite and personable, made sure the system…
In addition to detecting hidden leaks, the leak detector Daniel installed is going to reduce our homeowner’s insurance premium. We appreciated his expertise and his well-stocked truck so that the house and the sprinkler system flows were separate. He was polite and personable, made sure the system and the app worked for us, and cleaned up meticulously when his work was done.
★★★★★
I had an excellent experience with In Demand Plumbing, Heating & Air, especially Ezequiel and Donald. Ezequiel was professional, patient, knowledgeable and reassuring from the moment he arrived. I was dealing with a very stressful water-damage situation, and he took the time to listen as I…
I had an excellent experience with In Demand Plumbing, Heating & Air, especially Ezequiel and Donald. Ezequiel was professional, patient, knowledgeable and reassuring from the moment he arrived. I was dealing with a very stressful water-damage situation, and he took the time to listen as I explained what I had observed. He quickly identified the source of the problem—a broken toilet supply line upstairs that had caused significant water damage. He clearly explained what happened, completed the repair, restored the water and thoroughly tested everything to make sure there were no additional leaks. I especially appreciated Ezequiel’s communication and the time he took to discuss prevention, including recommending a Moen Flo system to help detect and mitigate potential water issues in the future. Donald, the HVAC technician, was also extremely helpful. He checked the HVAC system while they were there at no additional charge and made such a positive impression that I scheduled an appointment with him for next week to follow up on the system. Excellent customer service all around. Both Ezequiel and Donald made a stressful situation much easier to manage through their professionalism, knowledge and kindness. I would absolutely recommend In Demand Plumbing, Heating & Air.
★★★★★
I recently hired In Demand Plumbing, Heating & Cooling for multiple plumbing repairs around the house, and I couldn’t be more pleased. Vince repaired my kitchen sink, installed a new garbage disposal unit, and properly reseated a toilet that was leaking. Every job was done efficiently and…
I recently hired In Demand Plumbing, Heating & Cooling for multiple plumbing repairs around the house, and I couldn’t be more pleased. Vince repaired my kitchen sink, installed a new garbage disposal unit, and properly reseated a toilet that was leaking. Every job was done efficiently and professionally. I will definitely be calling them again for future plumbing work.
★★★★★
We had a great experience with In Demand Plumbing! Jesse came to our house to help with our plumbing needs and was quick, efficient, and professional. Don also came out for an HVAC checkup and was extremely thorough and communicative. He took the time to explain everything clearly and made sure we…
We had a great experience with In Demand Plumbing! Jesse came to our house to help with our plumbing needs and was quick, efficient, and professional. Don also came out for an HVAC checkup and was extremely thorough and communicative. He took the time to explain everything clearly and made sure we understood his findings and recommendations. Both Jesse and Don arrived on time and provided excellent service. We really appreciated their professionalism and would definitely recommend In Demand Plumbing!
★★★★★
10 stars for In Demand Plumbing! Elijah gave us a clear, detailed quote to replace our kitchen sink, faucet, and disposal, and made the whole process simple. On install day, Elijah and Don worked fast, were professional, and cleaned up everything. We love our new single-bowl sink and will…
10 stars for In Demand Plumbing! Elijah gave us a clear, detailed quote to replace our kitchen sink, faucet, and disposal, and made the whole process simple. On install day, Elijah and Don worked fast, were professional, and cleaned up everything. We love our new single-bowl sink and will absolutely use In Demand again.
★★★★★
Our plumber was not only prompt and professional, he demonstrated.a very high level of expertise and solve our issue in a short amount of time.
Awards & recognition
Awards, accreditation and community recognition earned by In Demand Plumbing, Heating & Air.
Antioch Chamber of Commerce
In Demand Plumbing, Heating & Air was recognized with a Best of Antioch 2026 award for plumbing.
Nextdoor
In Demand Plumbing, Heating & Air was recognized as a 2025 Nextdoor Neighborhood Fave.
Better Business Bureau
In Demand Plumbing, Heating & Air is a BBB Accredited Business with an A+ rating.
Talk to our team
Schedule tankless water heaters for your Antioch property or call our team about the problem.
