Knock Out Septic Tank Treatment 1 Litre


Code 5015861002426
In Stock
Add to Basket
Product Information
  • Knock Out Septic Tank Treatment 1 Litre
  • Effectively digest septic tank waste
  • Contains beneficial natural organisms
  • Maintains the balance required to ensure the optimum efficiency 
  • 1 Litre
Delivery Info

We are pleased to offer FREE delivery on orders over €79.99 to anywhere in the Republic of Ireland and Northern Ireland, and our Click & Collect service is FREE on all orders. All items are shipped from the Athlone Warehouse in Co. Westmeath, Ireland.

Delivery Costs are €6.99 for orders Under €79.99

We are now delivering to Northern Ireland with all delivery costs equal to the Republic of Ireland.

Large Bulky Items

Please be aware that large, bulky items (large appliances, white goods, etc.) have a delivery charge of €29.99.

View our full Delivery & Collection information?

Returns Policy

If you have ordered online at and would like to make a return it, you can return your item(s) - unopened and in its original undamaged packaging - anytime within 30 days, to our Athlone store for a full refund or exchange.

View our full Returns Policy

Store Reviews: Our Customers Love Us

Click to view complete product details

Knock Out Septic Tank Treatment 1 Litre

Knockout Septic Tank Treatment contains billions of naturally occurring microorganisms to help the tank to function effectively, thereby reducing odors, blocked drains, overflow and servicing costs. The natural biological action in septic tanks and cesspits are slowed down or possibly stopped over time due to the use of household detergents and harsh chemicals.


  • Formulated using a variety of natural biological enzymes each performing specific tasks
  • Break down paper or food waste, fats, and oils, proteins or starches
  • It does not contain any toxic or harmful components
  • Environmentally safe
  • It helps to restore the natural process affected by chemical wastes
  • Reducing odors from tanks and drains associated with domestic effluent and prolonging the time between emptying

POP-IN HTML goes here


Your Basket

Your basket is currently empty