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Backwater flaps for retrofitting ⌀ 160 mm

229,00 369,00 

inkl. VAT
Delivery Time: 2-5 working days
Artikelnummer N/A -

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Quickly and inexpensively prevent backwater from the street sewer through the house sewer into the building using the backwater valves.

  • Retrofitting
  • Simple, quick assembly without special tools
  • Special fixing part for secure hold as well as adjustment of the two backwater flaps
  • Flow optimized inlet
  • Easy swinging lid suspension
  • Optimum pressure distribution on the seal due to rounded flap design
  • Slanted and deposit-optimized flap bottom clearance


Our backflow valves are available for square as well as round plaster pieces.

Installation instructions:


A backwater valve is a device that prevents sewage from flowing back into the building from the house sewer. It is installed in a manhole on the street sewer, which connects to the house sewer. The damper opens when there is no flow in either direction and closes when there is flow in only one direction.

With the help of backwater valves from the street sewer via the house sewer into the building, you can prevent backwater quickly and inexpensively. These check valves are installed in flood-prone areas such as basements or underground garages.

The main function of the backwater valve is to prevent backflow when sewage from the house sewer (e.g., due to high pressure) flows backward through the house drain onto the property and then into an adjacent street sewer. The device consists of a flap valve, which is operated either manually or automatically, and a small chamber for storing water at times when it is not allowed to flow back.

Backwater valves are used in combination with other devices such as check valves and sump pumps to prevent sewage from an external source from flowing back into a building’s plumbing system.

A backwater valve can be installed inexpensively and quickly without disrupting the owner’s daily life.

The prices stated on the product pages include the statutory value added tax and other price components.

We only deliver within Austria, Germany, Switzerland, Italy and France via standard shipping. Express delivery on request. Other countries on request.

We charge a flat shipping fee of € 8.50 including VAT. (Austria, Germany), For Italy, France and Luxembourg € 21.00 incl. VAT.

Products with higher shipping costs (bulky goods) are calculated in the shopping cart.

When paying by cash on delivery, an additional fee of € 11.76 incl. VAT due, which the deliverer collects on site. There are no other taxes or costs. When delivering to Switzerland, customs processing fees incl. One-time shipping of € 34.00 excl. VAT calculated. The parcels are sent freight collect to Switzerland. Customs are taken over directly by the customer.