Is ventilation necessary for water heaters?

• <div><p>Not all <a href="https://www.angi.com/articles/types-of-water-heaters.htm">types of water heaters</a> require a venting system. Electric tankless water heaters don’t use natural or propane gas, so no venting is required. Instead, they use electric burners to heat water quickly and efficiently. However, any system that does use gas or propane will require ventilation. </p></div>

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Q: How do hot water heater expansion tanks work?

• <div><p>When the water expands in a hot water heater, it puts pressure on your hot water pipes and can cause leaks or a rupture in the hot water tank under certain conditions. Pipes or water heaters may split due to the pressure where there is a backflow preventer that prevents the hot water heater from diffusing pressure by releasing water back to the public water line.</p><p>In these scenarios, a hot water heater expansion tank provides a place for the hot water heater to relieve pressure and prevent bursts and leaks.</p></div>

Q: Are hot water heater expansion tanks necessary?

• <div><p>While many older homes don&rsquo;t need hot water heater expansion tanks, they&rsquo;re necessary in most newer homes and are required by building codes. These tanks are required by code in areas where there are backflow preventers or pressure regulators on the incoming water pipe between the public water pipes and the water heater. However, tankless water heaters don&rsquo;t require expansion tanks.</p></div>

Q: Can I install a water heater by myself?

• <div><p>While possible, professional assistance is recommended to ensure compliance with local regulations and avoidance of avoidable risks.</p></div>

Q: How big should a hot water heater expansion tank be?

• <div><p>The size needed for your expansion tank is determined by the size of your home's water heater. Expansion tanks are available in 2-gallon and 4.5-gallon sizes. A 2-gallon tank will be appropriate for water heaters up to 50 gallons. An adequately sized tank should have a volume that equals 2% to 5% of the water volume within the system. A plumber can evaluate your home's water pressure, water heater size, and other factors to provide suggestions for picking out the best expansion tank.</p></div>

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Verified Reviews for Water Heater Service pros in Boise City, OK

*The Angi rating for Water Heater Service companies in Boise City, OK is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Water Heater Service needs.

*The HomeAdvisor rating for Water Heater Service companies in Boise City, OK is a rating based on verified reviews from our community of homeowners who have used these pros to meet their Water Heater Service needs.

Last update on November 09, 2025

Reviewed in June 2025
They redone our gravel driveway, cut down a hill in front of our house to stop the water, diverted all water around the sides of our house, put in several areas of rip rap rock.
Dubb Trucking and Construction, LLC
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Reviewed in November 2023
These men were very helpful in prep us for the job. They did a temporary hook up so that we would have water at night when we were at home and worked on the wiring and plumbing during the day when we were gone. We experienced little to no inconvenience. We highly recommend them.
Spin Pumps LLC
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Reviewed in October 2023
Did a very professional job on installation on my new heater thank u all very much
Advantage Heating & Air
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Reviewed in May 2023
This was the absolute worst company to deal with. A week without hot water, close to $600 lighter and 2 trips from 2 different plumbers from this same company, we are no better off. Neither plumber that came out spent longer than 5 min with the tank and the office got rude, defensive, and...
Whitehead Plumbing LLC
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Reviewed in January 2018
Our 20+ year old heater quit working on a Sunday. Country Comfort arrived promptly on Monday morning. After they inspected the unit we discussed repair vs. new unit. They answered all our questions and left us with a quote with several options for a new HVAC. No pressure to decide on the spot;...
Country Comfort Heating & Air
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Reviewed in May 2014
called crow refidgeration from Davis, OK he came out and didnt do much inspecting and told us what was wrong and the price would be "around" $500.00 but didnt show up to do the job and we needed it ASAP so we decided to call red & blue heating and air. The owner Brent Riner came out did plenty...
Red and Blue Heating & Air
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Reviewed in April 2014
I called to get the icemaker repaired. Bob was punctual, very friendly, and ending up fixing the water dispensor as well, which hadn't worked in years. The price was very reasonable. I will most definitely call this repairman for all my future appliance repair needs.
Bob's Appliance Repair Co
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Reviewed in October 2013
Gary Henry and his helper came on a moment's notice to switch out our water well pump. That went well and even looked at one of my frost-free spigots that had lost water pressure. Fixed it for nothing and showed me how to fix it if needed in the future.
Henry's plumbing
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Find Water heater pros in Boise City

Neli Virtual Appliance Repair

Neli Virtual Appliance Repair

Customers say: Super punctual

Recommended by 94% of Angi customers

31637 local quotes requested

NEW! Appliance Consultation – Just $35 Get expert advice before you spend on repairs or replacements. A Neli technician will evaluate your issue and help you decide if your appliance can be fixed—or if it’s time for a new one. Virtual Appliance Diagnosis and Repair - Just $45 Service Description: Diagnose or repair your appliance virtually—no need for anyone to enter your home. Neli’s certified technicians guide you step-by-step via secure video chat. How It Works: Book online at nelihome.com or call 833-876-0900 Connect with a tech through our video platform Diagnose or fix the issue in real time Get expert advice and confidence in your next steps What’s Included: Real-time video guidance from a certified technician Diagnosis of the issue OR full repair (when possible) Step-by-step guidance using your smartphone or tablet Safe, contact-free service - no one in your home Flexible scheduling—appointments available daily Perfect For: Appliance fixes HVAC troubleshooting DIY-savvy homeowners Saving time and money on service calls

"Super helpful"

Michele H on November 2025

"Super helpful"

Michele H on November 2025

Happy at Home Plumbing LLC.

No reviews yet

Happy at Home Plumbing LLC.

No reviews yet

Free onsite estimate

Engages in the provision of plumbing services, including installation, repair, and maintenance of plumbing systems for residential and commercial clients. Specializations include pipe repairs, fixture installations, and water heater services.

Krell Distributing Co Inc

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Krell Distributing Co Inc

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53 years of experience

Additional DBA - Krell Industries. Family owned & operated. Nationwide service.

Solar Wolf Energy

2.00(

)

Solar Wolf Energy

2.00(

)

10 years of experience

Solar Wolf is a full service solar company with a great reputation and an old world belief to our customers. To under-promise and over-deliver, period. We have 18 years experience in construction, remodeling, roofing, solar water heaters, solar pv systems, battery back-up systems and much more. See what Solar Wolf Energy can do for you!

Okie Plumbin Services

5.00(

)

Okie Plumbin Services

5.00(

)

Recommended by 100% of Angi customers

Locally owned and operated in Sulpher since 1994. Okie Plumbin' Services specializes in general plumbing, commercial or residential. Offering over 20 years of experience, Okie exceptional customer service and guaranteed satisfaction.

All Service Handy

No reviews yet

All Service Handy

No reviews yet

13 years of experience

All Service Handy is a privately owned company established on March 25, 2012. A.S.H. is a proffesional handyman business which provides general contracting for a broad range and variety of jobs for home improvement and construction. All of us here at A.S.H. take pride in our work offering our personal time to ensure and develop a friendly relationship and a comfortable experience. We strive to continue being a leader and example in providing excellent customer satisfaction and 100% QUALITY guaranteed.

Owner operator for 15 years. Roof repair & replacement, fence repair/replacement, full kitchen & bath remodel, interior/exterior remodel, windows, doors, and floors. Insured. Financing options available. Accepting major credit cards.

First Choice Improvements

2.33(

)

First Choice Improvements

2.33(

)

Customers say: Super punctual

43 years of experience

Premium quality products. Factory direct, lowest everyday pricing. Ask about our seasonal specials.

Showing 1-10 of 28

Water Heaters questions, answered by experts

When the water expands in a hot water heater, it puts pressure on your hot water pipes and can cause leaks or a rupture in the hot water tank under certain conditions. Pipes or water heaters may split due to the pressure where there is a backflow preventer that prevents the hot water heater from diffusing pressure by releasing water back to the public water line.

In these scenarios, a hot water heater expansion tank provides a place for the hot water heater to relieve pressure and prevent bursts and leaks.

While many older homes don’t need hot water heater expansion tanks, they’re necessary in most newer homes and are required by building codes. These tanks are required by code in areas where there are backflow preventers or pressure regulators on the incoming water pipe between the public water pipes and the water heater. However, tankless water heaters don’t require expansion tanks.

Not all types of water heaters require a venting system. Electric tankless water heaters don’t use natural or propane gas, so no venting is required. Instead, they use electric burners to heat water quickly and efficiently. However, any system that does use gas or propane will require ventilation.

While possible, professional assistance is recommended to ensure compliance with local regulations and avoidance of avoidable risks.

The size needed for your expansion tank is determined by the size of your home's water heater. Expansion tanks are available in 2-gallon and 4.5-gallon sizes. A 2-gallon tank will be appropriate for water heaters up to 50 gallons. An adequately sized tank should have a volume that equals 2% to 5% of the water volume within the system. A plumber can evaluate your home's water pressure, water heater size, and other factors to provide suggestions for picking out the best expansion tank.

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