Heating HVAC company Hillside

Tank-Guard® Oil Tank Warranty

Tank-Guard® Oil Tank Warranty Protection Plan in DE, MD, & PA

Corrosion protection and warranty service for above ground fuel oil tanks up to 330 gallons capacity.

The TANK-GUARD® Program is a corrosion protection and warranty service for aboveground fuel oil tanks up to 330 gallons capacity. With this program, we offer our customers an effective chemical corrosion inhibitor plus the security of our “peace-of-mind” tank replacement warranty.

Why Choose TANK-GUARD®?

Although standard steel heating oil tanks are renowned for their strength and durability, they inevitably reach a point where replacement becomes necessary. Typically, internal corrosion is the culprit, gradually developing from natural condensation over time. Unfortunately, most homeowner insurance policies and oil dealer service agreements do not include coverage for oil tank replacement.

Enter our proactive TANK-GUARD® Oil Tank Protection Program. This program ensures that eligible tanks are shielded from the harmful effects of internal corrosion by applying an effective liquid corrosion inhibitor, thus reducing the risk of tank failure. Moreover, when your tank is registered in our program, you also benefit from substantial financial protection through our generous tank warranty if tank replacement becomes necessary.

A solid tank replacement warranty backs TANK-GUARD®. If the TANK-GUARD® warranty covers a tank leak, your oil tank will be replaced at no charge (parts and labor)*. The warranty includes removal and certified disposal of your old tank. Your oil tank is a vital heating system component and worth protecting. With this warranty, the TANK-GUARD® program offers complete tank protection. Oil leaks can be severe, so please check your oil tank regularly and call Hillside at the first sign of any leak.

Tank Guard Fuel Ox heating oil additive

Why Choose TANK-GUARD®?

TANK-GUARD® corrosion inhibitor is a water-soluble concentrate. It does not mix with the large quantity of oil in the tank. It mixes only with the relatively small amount of moisture and sludge in the tank bottom, where it serves as a neutralizing agent and helps to impede further corrosion.

TANK-GUARD® Program Overview

Safety Inspection
Hillside’s service technician will conduct an initial safety inspection to determine program eligibility, adhering to visual inspection guidelines recommended by the National Oilheat Research Alliance (NORA).

Corrosion Inhibitor Treatment
As part of routine oil delivery or service, your tank will receive a concentrated application of our TANK-GUARD® liquid corrosion inhibitor.

Oil Tank Warranty
In the event of internal corrosion-related leakage, while your tank is enrolled in the *TANK-GUARD® Program, your oil heat dealer will coordinate tank replacement, and you’ll receive a $2,000 warranty credit to offset replacement costs. Please consult your dealer for comprehensive warranty details.

Automatic Renewal
Your TANK-GUARD® protection automatically renews each year. You’ll receive a renewal bill, ensuring your tank is treated annually with the TANK-GUARD® corrosion inhibitor, and your warranty remains unaffected.

Click HERE for the enrollment form, details, warranty coverage, and terms & conditions.

REQUEST MORE INFORMATION

This contact form does not substitute for a service call request. Please call our office 302-738-4144 or 410-398-2146. Thank You.

SIGN UP FOR TANK-GUARD® PROGRAM TODAY!

To enroll in our TANK-GUARD® program, call us at 302-738-4144 (DE&PA) or 410-398-2146 (MD) or download our TANK-GUARD® Program.

WE LOVE OUR CUSTOMERS

All of our work is guided by three generations of family attitudes and values – respect, loyalty, integrity, accountability, honesty, kindness. We pride ourselves on building excellent relationships with our customers, some of whom we have served for decades, and then gone on to serve their children for decades. Above all, we know what it’s like to be a customer and how we’d like to be treated.

That’s why we’re so honored to have received thousands of glowing ratings, reviews, recommendations, and testimonials from our heating and cooling customers. It means the care we put into our work shows through, and that we truly are doing customer service right.

ExcellentFacebook star 1Facebook star 2Facebook star 3Facebook star 4Facebook star 55.0223 reviews
5.0Facebook star 1Facebook star 2Facebook star 3Facebook star 4Facebook star 5
Excellent223 reviews
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Joe Roach
January 29, 2025
positiverecommends
Hillside is great for both repairs and major system replacements. Reasonable prices and great service!
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Lauren Riebel
November 26, 2024
positiverecommends
This was our first time using this company & we will absolutely be using them again. Our technician was extremely knowledgeable & friendly. He really took the time to explain everything to us & didn’t try to sell us something new. I would 100% recommend this company to anybody in the area for any of your heating and cooling needs.
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Wendy Lewis
July 25, 2024
positiverecommends
My technician, Michael Fields II, assures me that all is well with my systems. I trust his assessment so feel confident that we will stay cool this summer and be warm this winter. He was polite, friendly, considerate, and EXTREEMLY popular with my pets. Bodhi and Baxter, one of the 2 dogs and one of the 2 cats, were very happy to follow him everywhere in the house. All 4 pets waited for him each time he went outside and made sure to get pets upon his return. I love that Michael came back this year and continues to take care of my systems as his father did before him. Very cool! Many thanks, and the crew looks forward to his return!
ExcellentGoogle star 1Google star 2Google star 3Google star 4Google star 54.8252 reviews
4.8Google star 1Google star 2Google star 3Google star 4Google star 5
Excellent252 reviews
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Priti Myers
October 6, 2026
Google star 1Google star 2Google star 3Google star 4Google star 5
Mike Fields just saved me $9000.00 on a heat pump and refrigerant line replacement. I can't thank him enough. He was personable, kind ,and knowledgeable. He was able to explain the problem and the fix. Another company who I worked with for years came to take a look at the problem and stated that my heat pump needed to be replaced, when the fix was very simple. Its hard to tell the good guys from the bad now a days but Mike's one of the good ones. Thank you Mike.
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Tia Jones Medine
October 2, 2026
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Mike was very helpful, friendly and informative about the heating system issue. I appreciated his honesty and would definitely recommend Hillside Oil, Heating and Cooling.
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Jessica Casson
September 28, 2026
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Great team - very knowledgeable, efficient, and completely respectful of the space. Really appreciate everything you did to get us back up and running!
Hillside Oil Heating & Cooling proudly serves New Castle County, DE, Chester County, PA, and Cecil County, MD with trusted heating oil delivery, HVAC service, and expert home comfort solutions.

Proudly Serving New Castle County, DE, Cecil County, MD and Southern Chester County, PA.

Call Hillside Oil Heating & Cooling at 302-738-4144 for DE & PA or 410-398-2146 for MD

302-738-4144 (DE & PA) 410-398-2146 (MD)

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