Is this septic safe if the drain line drains into the house plumbing?

Hi Michael Bradburn, Thank you for reaching out, and we appreciate your interest in HVAC Guys. No, the Flow Tabs with Gel is not safe for systems with aerobic septic systems. We hope you'll find this answer helpful! If you have any other questions or concerns, please let us know by contacting us directly -- https://amzn.to/2Uw4SxW. Customer satisfaction is our top priority, and we are always happy to help! --- Zoey, Customer Service Manager

What is the active ingredient?

Hi J. Thomas, Thank you for your question, and we appreciate your interest in the Leak Saver. The active ingredients found in the Flow Tabs are: Urea, Benzyl-C12-18-alkyldimethyl, and ammonium chlorides. We hope you'll find this answer helpful! If you have any other questions or concerns, please let us know by reaching out to us directly -- https://amzn.to/3RwhZNp. Customer satisfaction is our top priority, and we are always happy to help! Customer Service

Will this cause metal components to rust?

Hi LM, Thank you for reaching out, and we appreciate your interest in Leak Savers. No, the HVAC Guys Flow Tabs will not cause rust. We hope you'll find this answer helpful! If you have any other questions or concerns, please let us know by contacting us directly -- https://amzn.to/2Uw4SxW. Customer satisfaction is our top priority, and we are always happy to help! --- Zoey, Customer Service Manager

Should I be using these during the winter season when we are not using the air conditioner? Also, can this tablet fit in a 3/4 drain line?

Hi B. Howard, Thank you for reaching out to us, and we appreciate your interest in HVAC Guys Flow Tabs. During winter, a Flow Tab would not be needed as when your system is in "heating" mode, there wouldn't be moisture dripping into the drain pan. However, when using your system in the summer in "cooling" mode, moisture in the air will condense on the cold coil and drip into the pan, which can cause mold/odors/slime to grow in your pan. This is where you would use the Flow Tabs. The Flow Tabs can fit a 3/4 inch line; for best results, you must place the tab on the drain pan, not inside the line. For your reference, the Flow Tab 3 Ton is 1 inch in diameter and 1/2 inch in height. We hope you find this answer helpful. If you have any other questions, do not hesitate to contact us directly —https://amzn.to/2Uw4SxW. ----Zoey Customer Service

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