Enjoy fast, free delivery, exclusive deals, and award-winning movies & TV shows with Prime
Try Prime and start saving today with fast, free delivery

Get Fast, Free Shipping with Amazon Prime FREE Returns

FREE delivery Thursday, May 2 on orders shipped by Amazon over $35. Order within 10 hrs

Select delivery location

In Stock

$$12.98 () Includes selected options. Includes initial monthly payment and selected options. Details

Enhancements you chose aren't available for this seller. Details

${cardName} not available for the seller you chose

${cardName} unavailable for quantities greater than ${maxQuantity}.

Ships from

Amazon.com

Ships from

Amazon.com

Sold by

Amazon.com

Sold by

Amazon.com

Returns

Eligible for Return, Refund or Replacement within 30 days of receipt

Returns

Eligible for Return, Refund or Replacement within 30 days of receipt

This item can be returned in its original condition for a full refund or replacement within 30 days of receipt.

Read full return policy

Payment

Secure transaction

Payment

Secure transaction

We work hard to protect your security and privacy. Our payment security system encrypts your information during transmission. We don’t share your credit card details with third-party sellers, and we don’t sell your information to others. Learn more

Details

Add a gift receipt for easy returns

FREE delivery Thursday, May 2 on orders shipped by Amazon over $35. Order within 10 hrs

In Stock

Deliver every:

$$12.98 () Includes selected options. Includes initial monthly payment and selected options. Details

Enhancements you chose aren't available for this seller. Details

${cardName} not available for the seller you chose

${cardName} unavailable for quantities greater than ${maxQuantity}.

Ships from and sold by Amazon.com

Other sellers on Amazon

New (7) from $12.98 FREE Shipping on orders over $35.00 shipped by Amazon.

2 VIDEOS

Zep is an expert in professional cleaning for over 80 yearsZep Inc

Image Unavailable

Image not available for
Color:

To view this video download Flash Player

Zep Septic Defense System Treatment Dissolvable Packs - 6 Month Supply - ZSTP6 - Safe for Pipes and All Septic Tanks , Brown

Visit the Zep Store

4.4 219 ratings

| Search this page

Amazon's Choice in Septic Tank Treatments by Zep

List Price:	$24.00 Details The List Price is the suggested retail price of a new product as provided by a manufacturer, supplier, or seller. Except for books, Amazon will display a List Price if the product was purchased by customers on Amazon or offered by other retailers at or above the List Price in at least the past 90 days. List prices may not necessarily reflect the product's prevailing market price. Learn more
Price:	$12.98 Get Fast, Free Shipping with Amazon Prime FREE Returns Return this item for free Free returns are available for the shipping address you chose. You can return the item for any reason in new and unused condition: no shipping charges Learn more about free returns. How to return the item? Go to your orders and start the return Select the return method Ship it!
You Save:	$11.02 (46%)

Item Package Quantity: 1

Size: 12 Ounces

{"desktop_buybox_group_1":[{"displayPrice":"$12.98","priceAmount":12.98,"currencySymbol":"$","integerValue":"12","decimalSeparator":".","fractionalValue":"98","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":"UjPwfFNEwRcrsPo0upOJECskeNkC4Apfiw%2FrpZhKYATcBKM%2By6wjsKbP8OzTVrZpNsit0A%2F2IXtEPyv0tJkKH7CDJ8GD9AxYn%2FmwxqdmgnMQfmKTxUoly030GNP%2F1S4%2BVFZtUVe%2FpfvaAb9OqXAKpw%3D%3D","locale":"en-US","buyingOptionType":"NEW","aapiBuyingOptionIndex":0}, {"displayPrice":"$12.98","priceAmount":12.98,"currencySymbol":"$","integerValue":"12","decimalSeparator":".","fractionalValue":"98","symbolPosition":"left","hasSpace":false,"showFractionalPartIfEmpty":true,"offerListingId":null,"locale":"en-US","buyingOptionType":"SNS","aapiBuyingOptionIndex":1}]}

Purchase options and add-ons

Brand	Zep
Scent	Unscented
Item Weight	0.75 Pounds

About this item

Biodegradable formula that degrades and digests waste
Enzymes digest paper, fats, proteins, oils, grease & starches
Use one pack per month
Helps to stop unpleasant odors
For septic tanks up to 1,500 gallons

Report an issue with this product or seller

Consider a similar item

Amazon's Choice

Vacplus Septic Tank Treatment 12 Pcs for 1-Year Supply, Dissolvable Packs with Easy Operation, Durable Biodegradable Enzymes for Wastes, Greases & Odors

1 Count (Pack of 12)

(1966)

$9.99 ($0.83/Count)

Climate Pledge Friendly

Frequently bought together

Zep Septic Defense System Treatment Dissolvable Packs - 6 Month Supply - ZSTP6 - Safe for Pipes and All Septic Tanks , Brown

$12.98

Get it as soon as Thursday, May 2

In Stock

Ships from and sold by Amazon.com.

zep inc erk2 Zep, 2 LB, Drain Care Root Kill

$15.28 ($0.48/Fl Oz)

Get it as soon as Thursday, May 2

In Stock

Ships from and sold by Amazon.com.

Zep Drain Defense Pipe Build-Up Remover - 64 Ounces - ZLDC648 - Professional Strength Liquid Pipe Build Up Remover,GREEN

$12.98

Get it as soon as Thursday, May 2

In Stock

Ships from and sold by Amazon.com.

Total price:

To see our price, add these items to your cart.

Try again!

Details

Added to Cart

Choose items to buy together.

19,545
Amazon's Choice
in Septic Tank Treatments
2 offers from $23.97
3,424
2 offers from $19.49
645
1 offer from $19.95
502
1 offer from $19.95
405
1 offer from $17.99
3,570
1 offer from $12.47

Top Brand: Zep

Highly Rated

100K+ customers rate items from this brand highly

Trending

100K+ orders for this brand in past 3 months

Low Returns

Customers usually keep items from this brand

From the brand

Zep is more than just another cleaning company. We are a passionate group who have been perfecting cleaning formulas for homes, businesses, and automobiles for over 85 years with one goal in mind: Making safe and efficacious products that do the job right the first time. Our products give you the efficacy of a deep clean without all the extra work.
Featured Products

Visit the Store
Shop Floor Care

Visit the Store
Shop Air Care

Visit the Store
Shop Drain & Septic

Visit the Store
Shop Hand Care

Visit the Store
Zep products are all formulated in the U.S. with a dedicated R&D team who knows how to clean everything, from a small stain on a carpet to some of the toughest messes on Earth. And, because we have a professional heritage, our products surpass all standards for safety.

At Zep, we care about cleaning because that is all we do. Upgrade your clean and experience the Zep difference!

Product Description

Use one pre-measured bag once every two months for a 500-gallon tank

Septic Defense

Septic Defense Septic System Treatment Packs is a formula that degrades and digests waste. It replenishes the essential bacteria that break down fats, oils, grease, and organic waste. The easy-to-use concentrated formula is safe for pipes. Use one pre-measured bag once every two months for a 500-gallon tank.

Replenishes the essential bacteria that break down fats, oils, grease and organic waste
Easy-to-use concentrated formula is safe for pipes

Product details

Is Discontinued By Manufacturer ‏ : ‎ No
Product Dimensions ‏ : ‎ 11 x 9 x 4 inches; 12 ounces
Item model number ‏ : ‎ AX-AY-ABHI-59549
Date First Available ‏ : ‎ September 1, 2004
Manufacturer ‏ : ‎ Zep
ASIN ‏ : ‎ B00GW9WGR8
Country of Origin ‏ : ‎ China

Best Sellers Rank: #47,046 in Health & Household (See Top 100 in Health & Household)
- #32 in Septic Tank Treatments

Customer Reviews:
4.4 219 ratings

Compare with similar items

	This Item Zep Septic Defense System Treatment Dissolvable Packs - 6 Month Supply - ZSTP6 - Safe for Pipes and All Septic Tanks , Brown	Recommendations Septic Tank System Treatment Pods - 12 Dissolving Packets \| Enzyme-Producing Live Bacteria Solution \| 1 Year Supply Professional Eco-Friendly Maintenance \| Prevent Clogs, Odor & Backups \| Made in USA	dummy Zep Septic Tank Treatment 2 / Pk	dummy GREEN PIG 52 Live Tank Treatment Aids in The Breakdown of Septic Waste to Prevent Backups with Easy Dissolvable Flush, Consumer Strength	dummy zep inc erk2 Zep, 2 LB, Drain Care Root Kill	dummy Septic Tank Treatment - 1 Year Supply of Septic Safe Dissolvable Easy Flush Live Bacteria Packets (12 Count) - Best Way to Prevent Expensive Sewage Backups - Made in USA
	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart	Try again! Details Added to Cart
Price	-46% $12.98 List: $24.00	$19.95	$14.65	-10% $18.00 List: $19.99	$15.28	-27% $23.97 List: $32.99
Price Per Unit	—	$1.66 / Count	$3.66 / Ounce	—	$0.48 / Fl Oz	$2.00 / Count
Delivery	Get it as soon as Thursday, May 2	Get it as soon as Thursday, May 2	Get it May 3 - 8	Get it as soon as Thursday, May 2	Get it as soon as Thursday, May 2	Get it as soon as Thursday, May 2
Customer Ratings	4.4219	4.6645	4.558	4.78,467	4.5600	4.719,545
Value for money	4.2	4.6	4.0	4.7	4.4	4.7
Easy to use	4.2	4.8	5.0	4.9	4.8	4.9
Scent	—	4.4	—	4.5	—	4.4
Sold By	Amazon.com	Two Day Direct	bestbrandsupply	Greenpig	Amazon.com	Obsession Products
size	12 Ounces	One Year Supply	2 Ounce (Pack of 2)	1-Year	—	12 Count (Pack of 1)
form	—	Capsule	—	Bar	—	Liquid
weight	0.75 pounds	—	0.12 pounds	0.25 pounds	2 pounds	—
unit count	6	12	4	4	32	12

Important information

Ingredients

sodium carbonate

Legal Disclaimer

Statements regarding dietary supplements have not been evaluated by the FDA and are not intended to diagnose, treat, cure, or prevent any disease or health condition.

Looking for specific info?

Customer reviews

4.4 out of 5

219 global ratings

How customer reviews and ratings work

Customers say

Customers like the performance, ease of use, quality and value of the drain opener substance. For example, they mention it works well, easy to remember and use the right amount of septic. That said some complain about the damage.

AI-generated from the text of customer reviews

23 customers mention23 positive0 negative

Customers are satisfied with the performance of the drain opener. They mention that it works well, is great, and easy to use. Some say that it has kept their system working for 2 years and has never had any issues.

"This product is easy to use and has kept my system working for 2 years." Read more

"The product is great... but the posted cost on Amazon is about TWICE what I paid for at a local Home Depot...." Read more

"...The product works awesome my daughter uses Zep Septi-pal and recommend it to me.I will keep ordering this produce. Easy to use." Read more

"product works well" Read more

17 customers mention17 positive0 negative

Customers find the drain opener substance easy to use and remember. They also say it's easy to remember and use the right amount of septic.

"This product is easy to use and has kept my system working for 2 years." Read more

"Easy to use to get rid of unwanted odor." Read more

"Love these things, makes it so easy to remember and use right amount of septic treatment. I just pop 1 packet in on the first of every month...." Read more

"Extremely simple to use. However, I don’t submerge the plastic wrapper but rather, I just empty the enzymes directly into the water...." Read more

11 customers mention11 positive0 negative

Customers are satisfied with the quality of the drain opener substance. They mention that it is a solid product, and makes septic treatment super easy.

"Love these things, makes it so easy to remember and use right amount of septic treatment. I just pop 1 packet in on the first of every month...." Read more

"We use one every month. So far so good - no issues with our septic. Just place in the toilet and you're done!" Read more

"Septic tank, great product. Easy to use." Read more

"Good stuff! Keeps the tank a movin" Read more

10 customers mention10 positive0 negative

Customers appreciate the value of the drain opener substance. They mention it has a good price.

"...And Amazon has it at a terrific price!" Read more

"Famous brand, great price does the trick I use once per month, very easy to do" Read more

"Bacteria for cesspool and this gives you it at a small price, cheaper than home depot" Read more

"Been using for years. So easy to use and much less expensive then other brands. Have been trouble free with this product." Read more

7 customers mention0 positive7 negative

Customers are dissatisfied with the damage of the drain opener substance. They mention that the package arrived with three of the six packets broken open, the inside packages broke and mixed together, and the master packs had broken individual packs. Some customers also say that only two of the packs were intact, while the rest were ripped and torn.

"...Cannot use as six individual applications because inside packages broke and mixed together. Product looks like old left overs. Would never re-order." Read more

"Six “pacs” were included in the package. When it arrived, only two of the packs were intact, the rest were ripped and torn and leaking out the..." Read more

"We love this brand for our septic but these arrived all busted open and a huge mess...." Read more

"...The package arrived with three of the six packets broken open. I had to pour all the loose content into a measuring cup and divide by three...." Read more

Reviews with images

See all photos

Sort reviews by

Top reviews from the United States

There was a problem filtering reviews right now. Please try again later.

Geidy

Great Product

Reviewed in the United States on March 30, 2021

Item Package Quantity: 1Size: 12 OuncesVerified Purchase

This product is easy to use and has kept my system working for 2 years.

Helpful

JanP

Easy to use

Reviewed in the United States on December 9, 2023

Item Package Quantity: 1Size: 12 OuncesVerified Purchase

Have used for years and, while I have no proof of how well it is working, I have not had any issues. ZEP always makes a good product.

Helpful

It works

Reviewed in the United States on March 3, 2018

Item Package Quantity: 1Size: 12 OuncesVerified Purchase

I have used this product for *many* years. Never had to have the tank pumped.

It used to be made by a different company, and came loose in a cardboard container, sort of like a Pringles can. Can't remember the old name. I'd buy several cans at a time. Then suddenly, I couldn't find it anywhere, even online. After much online research, I realized that the 'Zep' company had bought out the other one, re-branded the product, and re-packaged it in tidy, handy plastic bags that quickly dissolve in the toilet bowl. I actually found an ingredient comparison between my old product and this Zep one... they are the same.

Now, I know that some folks say you don't need to add anything to a septic tank, but I do know first hand that I faithfully add this stuff every month and haven't had the tank pumped in many years. Nexus between the two? You be the judge. I'll keep using it!

8 people found this helpful

Helpful

Paul Da Ponte

The product is great..

Reviewed in the United States on May 26, 2017

Item Package Quantity: 1Size: 12 OuncesVerified Purchase

The product is great... but the posted cost on Amazon is about TWICE what I paid for at a local Home Depot.
Again, its awesome and does the trick, but check prices before splashing $23 on what Home Depot charges $12.

2 people found this helpful

Helpful

T. Womack

Never found a ZEP product I didn't like.

Reviewed in the United States on January 26, 2018

Item Package Quantity: 1Size: 12 OuncesVerified Purchase

This is one of those products that is hard to give a review. You don't see it so you don't really know. I have been using this product once a month for about 3 years. I have not had any problems with my septic system so I think it's doing the job it is supposed to do. I was introduced to ZEP products when my son worked for the company and brought home products that he was supposed to sell. I can honestly say that I have never tried a product from them that I didn't like and didn't work well. When I have the option to buy a product and there are different brands, I always choose the ZEP brand if it is possible.

12 people found this helpful

Helpful

Nina Queen

Best quality vs price product

Reviewed in the United States on May 5, 2019

Item Package Quantity: 1Size: 12 OuncesVerified Purchase

Easy to use to get rid of unwanted odor.

Helpful

Darren Garhart

Product old

Reviewed in the United States on December 20, 2022

Item Package Quantity: 1Size: 12 OuncesVerified Purchase

Supposed to be six individual packages in one master pack. All three master packs have broken individual packs. Cannot use as six individual applications because inside packages broke and mixed together. Product looks like old left overs. Would never re-order.

One person found this helpful

Helpful

Howard

Better then the more exspensive brand and cheaper too!

Reviewed in the United States on November 14, 2018

Item Package Quantity: 1Size: 12 OuncesVerified Purchase

Just had are septic tank pumped and zep was recommended by the service guy who pumped are sepetic tank. He said don't waste your money on r_d-x, zep works just as well for about a third of the price. And Amazon has it at a terrific price!

2 people found this helpful

Helpful

Disclaimer: While we work to ensure that product information is correct, on occasion manufacturers may alter their ingredient lists. Actual product packaging and materials may contain more and/or different information than that shown on our Web site. We recommend that you do not solely rely on the information presented and that you always read labels, warnings, and directions before using or consuming a product. For additional information about a product, please contact the manufacturer. Content on this site is for reference purposes and is not intended to substitute for advice given by a physician, pharmacist, or other licensed health-care professional. You should not use this information as self-diagnosis or for treating a health problem or disease. Contact your health-care provider immediately if you suspect that you have a medical problem. Information and statements regarding dietary supplements have not been evaluated by the Food and Drug Administration and are not intended to diagnose, treat, cure, or prevent any disease or health condition. Amazon.com assumes no liability for inaccuracies or misstatements about products.

Return this item for free

Choose how often it's delivered

Skip or cancel any time

Image Unavailable

Zep Septic Defense System Treatment Dissolvable Packs - 6 Month Supply - ZSTP6 - Safe for Pipes and All Septic Tanks , Brown

Return this item for free

Purchase options and add-ons

About this item

Consider a similar item

Frequently bought together

Similar items that may deliver to you quickly

Top Brand: Zep

From the brand

Featured Products

Shop Floor Care

Shop Air Care

Shop Drain & Septic

Shop Hand Care

Product Description

Septic Defense

Product details

Compare with similar items

Videos for this product

REAL DEAL What you need to know

Videos for this product

Zep is an expert in professional cleaning for over 80 years

Important information

Ingredients

Legal Disclaimer

Looking for specific info?

Customer reviews

Customers say

Reviews with images

Top reviews from the United States

There was a problem filtering reviews right now. Please try again later.

Amazon Prime includes:

One-time purchase: $12.98$12.98 FREE delivery Thursday, May 2 on orders shipped by Amazon over $35 Ships from: Amazon.com Sold by: Amazon.com

Unlock 5% savings

Choose how often it's delivered

Skip or cancel any time

Unlock 5% savings

Choose how often it's delivered

Skip or cancel any time

Added to cart

Zep Septic Defense System Treatment Dissolvable Packs - 6 Month Supply - ZSTP6 - Safe for Pipes and All Septic Tanks , Brown

Purchase options and add-ons

About this item

Consider a similar item

Frequently bought together

Similar items that may deliver to you quickly

Top Brand: Zep

From the brand

Featured Products

Shop Floor Care

Shop Air Care

Shop Drain & Septic

Shop Hand Care

Product Description

Septic Defense

Product details

Compare with similar items

Videos

Videos for this product

REAL DEAL What you need to know

Videos for this product

Zep is an expert in professional cleaning for over 80 years

Important information

Ingredients

Legal Disclaimer

Looking for specific info?

Customer reviews

Customers say

Reviews with images

Top reviews from the United States

There was a problem filtering reviews right now. Please try again later.

One-time purchase:

$12.98

FREE delivery Thursday, May 2 on orders shipped by Amazon over $35

Ships from: Amazon.com

Sold by: Amazon.com