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Barrettine 1 Litre Knock Out Biological Drain Treatment for Household Waste Pipes & Septic Tanks
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£8.73 ex. VAT £7.28
Overview ✕

Barrettine Knock Out Biological Drain Treatment is formulated for the regular maintenance and cleaning of household waste pipes. This biological treatment supports the natural breakdown of organic waste inside plumbing runs, helping to prevent blockages and build-up over time. Supplied in a 1-litre single bottle, it provides a dedicated maintenance solution for domestic drainage systems without the use of harmful or corrosive additives. It is suitable for routine pipe care as well as specialised waste handling units including waste disposal systems, septic tanks, and Saniflo systems. Always follow the instructions and dosing measurements provided on the product label. Keep out of reach of children. Contains benzisothiazolinone and limonene; may produce an allergic reaction.

Features

  • Biological formula actively supports the breakdown of organic waste in household pipework.
  • Helps prevent waste build-up when used for regular pipe cleaning and maintenance.
  • Safe for specialised installations including septic tanks, Saniflo systems, and waste disposal units.
  • Contains no harmful or corrosive additives according to the manufacturer.
  • Supplied in a 1-litre bottle for straightforward measuring and application per label directions.

Specifications

  • Brand: Barrettine
  • Product Code: KOBD001
  • Size: 1 Litre
  • Pack Quantity: 1
Delivery Details ✕

 

Our Delivery Options

Express 1/3 Day Delivery

  • Delivery Fee:
    • £3.79 delivery for orders under £30
    • Free delivery for orders over £30
  • Order By:
    • 2:30pm 
  • Delivery Time: Before 6pm Monday-Friday

Next Business Day Delivery

  • Delivery Fee:
    • £7.50
  • Order By:
    • 2:30pm 
  • Delivery Time: Before 6pm Monday-Friday

Pre-12 Next Business Day Delivery

  • Delivery Fee: £16.99 delivery for all pre-12 orders (Weekend Only)
  • Order By:
    • 2:30pm 
  • Delivery Time: Before 12pm Monday-Friday

Remote Areas Delivery

  • Delivery Fee:
    • £3.99 
  • Order By:
    • 2:30pm 
  • Delivery Time: Standard delivery (2-4 days)

Weekend Delivery

  • Delivery Fee:
    • £19.99
  • Order By:
    • 2:30pm Friday
  • Delivery Time: Before 6pm Saturday

Good To Know

For orders to some addresses, especially in the Highlands of Scotland and Offshore, next day delivery options are not available and delivery can take several days. Saturday delivery is not available for remote areas.

Items over 30kg: Items over 30kg can only be delivered from Monday to Friday. If ordered before 3pm, please allow up to two business days for delivery. Orders placed after 6pm Thursday will be delivered after the weekend.

 

 

 

 

Barrettine Knock Out biological drain treatment in a 1 litre bottle.
BRAND: Barrettine

Barrettine 1 Litre Knock Out Biological Drain Treatment for Household Waste Pipes & Septic Tanks

purchased in the last 24 hours
£8.73 inc VAT
/
£7.28 ex VAT
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Barrettine Knock Out Biological Drain Treatment is formulated for the regular maintenance and cleaning of household waste pipes. This biological treatment supports the natural breakdown of organic waste inside plumbing runs, helping to prevent blockages and build-up over time. Supplied in a 1-litre single bottle, it provides a dedicated maintenance solution for domestic drainage systems without the use of harmful or corrosive additives. It is suitable for routine pipe care as well as specialised waste handling units including waste disposal systems, septic tanks, and Saniflo systems. Always follow the instructions and dosing measurements provided on the product label. Keep out of reach of children. Contains benzisothiazolinone and limonene; may produce an allergic reaction.

Features

  • Biological formula actively supports the breakdown of organic waste in household pipework.
  • Helps prevent waste build-up when used for regular pipe cleaning and maintenance.
  • Safe for specialised installations including septic tanks, Saniflo systems, and waste disposal units.
  • Contains no harmful or corrosive additives according to the manufacturer.
  • Supplied in a 1-litre bottle for straightforward measuring and application per label directions.

Specifications

  • Brand: Barrettine
  • Product Code: KOBD001
  • Size: 1 Litre
  • Pack Quantity: 1

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Free express delivery on all orders over £30. Choose your speed at checkout.

Express Delivery

1–3 working days

Orders under £30
£3.79
Orders over £30
FREE

Next Day Delivery

Order by 2pm Mon–Fri

All orders
£7.50
FREE for Gold members

Pre 12 Delivery

Next working day, by midday

All orders
£16.99

Pre 10.30 Delivery

Next working day, by 10:30am

All orders
£19.99

Weekend Delivery

Saturday & Sunday

Orders under £30
£13.99
Orders over £30
£7.50

Remote Areas Delivery

Highlands, islands & remote postcodes

Orders under £30
£5.49
Orders over £30
£3.00

Orders before 2pm Mon–Fri dispatch same day. Remote-area surcharges apply to Highlands, islands & selected postcodes. All prices include VAT.

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