ZEP 12 oz. Septi-Pak Concentrated Septic System Treatment-ZSTP6 - The Home Depot


Model # ZSTP6

Internet # 204342290

Store SKU # 571165

12 oz. Septi-Pak Concentrated Septic System Treatment

ZEP 12 oz. Septi-Pak Concentrated Septic System Treatment

This item has been discontinued.
The Home Depot no longer carries this specific product.

$11.98 / each


Model # ZSTP6

Internet # 204342290

Store SKU # 571165

Septic systems rely on a healthy level of bacteria and enzymes in the system to break down household waste. Zep Commercial Septi-Pak Concentrated Septic System Treatment replenishes bacteria that common cleaners kill. Monthly treatment helps to prevent system backups and stop unpleasant odors. Simply drop one pouch in the toilet and flush.

  • Concentrated formula contains enzyme producing bacteria
  • Flush 1 packet per month
  • Safe for all pipes and septic tanks
  • Enzymes break down household waste helping prevent system back ups
  • Reduces sludge build-up in septic tanks and drain fields
  • Comes in resealable bag

Info & Guides

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Product Depth (in.)  7.5  Product Height (in.)  10.9 
Product Width (in.) 
Chemical Form  Powder  Commercial / Residential  Commercial / Residential 
Compatible Pipe Material  PVC  Maintenance, Repair & Supplies Product Type  Drain Openers & Chemicals 
Number of treatments per container  Prevention formula  Yes 
Protects pipes from corrosion  Yes  Quantity (oz.)  12 
Safe for garbage disposals  No  Set Time (Min.)  0.10 
Warranty / Certifications
Manufacturer Warranty  Not applicable 


Rated 4.5 out of 5 by 13 reviewers.
Rated 4.0 out of 5.0 by No muss no fuss Pacakge comes with 6 packets. Packet is completely enclosed so there is nothing to get on your hands when you drop it into the toilet. You don't have to wear gloves. I dropped it in to my toilet and walked away. I don't remember how long before I came back but I couldn't see anything when i did so it must dissolve fast and completely. Not sure why you have to use one every month but if it works it seems like an inexpensive way to maintain your septic system. October 9, 2013
Rated 4.0 out of 5.0 by The brand name "ZEP" has never let me down yet! I use this product regularly and have never had a septic issue. It's preventative maintenance is a little flushable pouch. Although; I found that letting the package dissolve for 4-5 minutes, and then flushing 2-3 times works best for me. December 6, 2013
Rated 5.0 out of 5.0 by Very convenient without any mess I really like not have to pour septic treatment into the toilet, and these dissolvable packs make it very convenient. I no longer have to measure from a box, and spill on the floor, or end up paying more just to buy one treatment at a time in a box. Very happy. November 4, 2013
Rated 5.0 out of 5.0 by Very easy to use Well the instructions were very easy to understand, lol. You just take a pouch and drop it in the toliet, flush and wait. So far I have only used 1 pouch to hope to see a difference soon. October 9, 2013
Rated 5.0 out of 5.0 by one application treats septic for 1 to 2 months This is a great product from Zep. It is very convenient to use without pouring the product in the toilet. just drop in the package which will disolve and flush the toilet. It treats 1000 gal tank for 1 month or 500 gal. tank for 2 months. September 29, 2013
Rated 5.0 out of 5.0 by A must for every septic user This product works great. I use 1 packet every month as recommended and I haven't had my 1000 gallon tank pumped in 6 years. I would definitely recommend this product. And its one of the cheaper products on the market..... October 27, 2013
Rated 4.0 out of 5.0 by Easy To Use Septic Treatment Tried the Septi-Pak Concentrated Septic System Treatment and is really easy to use. Put in toilet, let it sit for a few minutes so that the bag can dissolve, flush, and in my case flush again. The treatment is supposed to last for 30 days for septic tanks up to 1500 gallons. The packaging has all kinds of warnings, just like any chemical product. The only down side to this product is the lack of the active ingredients on the packaging, which is something that I would have liked to have seen. The pictures show the sequence of the entire operation. July 28, 2013
Rated 5.0 out of 5.0 by Excellant product Very easy to use. Just drop product into toilet and package will desolve then flush the toilet. Your set for two months treatment. Very effective and I have used this product for 1Year and will continue to do so. July 30, 2014
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Store Exclusive. This item is available for purchase in select stores only.