Flexseal Water Management > Non Return and Backwater Valves

Non Return Valves (in line Backwater valves)

A range of Single-flap and Double-flap valves for installation onto sewerage pipe lines - Essential in helping to protect buildings against backwater flooding due to rainwater travelling back up the sewerage system.
Automatically operated, providing free-flow wastewater drainage according to the slope of the rainwater drain. These backwater valves are available in a wide range of sizes and are easy to install in waste water networks and systems with pipes of 110mm, 160mm and 200mm.

BENEFITS

  • Backwater valves are 100% tested for safety and comply with the guidelines set out in BS EN 13564
  • Robust design and maintenance-free operation

CHARACTERISTICS

  • Stainless steel anti-flooding flaps
  • Special design of the body minimises the risk of solid waste accumulating and blocking inside the valve
  • Also suitable as a rodent deterrent

Backwater Valves (Non Return Valves) Data Sheet
Retrofit Non Return Valves

BACKWATER VALVES, SINGLE FLAP

  • Suitable for stormwater applications
Code Description OD Height Width Length Weight
BWV110/1 110mm Backwater Valve 110mm 200mm 190mm 310mm 1.42kg
BWV160/1 160mm Backwater Valve 160mm 260mm 235mm 340mm 2.03kg
BWV200/1 200mm Backwater Valve 200mm 353mm 304mm 560mm 6.60kg


BACKWATER VALVES, DOUBLE FLAP

  • Suitable for foul sewerage systems
Code Description OD Height Width Length Weight
BWV110/2 110mm Backwater Valve 110mm 195mm 205mm 395mm 1.86kg
BWV160/2 160mm Backwater Valve 160mm 273mm 304mm 577mm 5.05kg
BWV200/2 200mm Backwater Valve 200mm 353mm 304mm 560mm 7.50kg

Products

flexseal non-return valve 110mm bwv110/1
Flexseal Non-Return Valve 110mm BWV110/1
Flex Seal In-Line Backwater Valve With Single Flap For 110mm PVC Pipe Prevents Flooding Due to Rainwater Travelling Backwards Up the Sewerage System. Suitable for Stormwater Applications. Complies With BS EN 13564
More Info
Ex Vat: £45.00
(Inc VAT £54)
Qty:
flexseal non-return valve 160mm bwv160/1
Flexseal Non-Return Valve 160mm BWV160/1
Flex Seal In-Line Backwater Valve With Single Flap For 160mm PVC Pipe Prevents Flooding Due to Rainwater Travelling Backwards Up the Sewerage System. Suitable for Stormwater Applications. Complies With BS EN 13564
More Info
Ex Vat: £65.00
(Inc VAT £78)
Qty:
flexseal non-return valve 200mm bwv200/1
Flexseal Non-Return Valve 200mm BWV200/1
Flex Seal In-Line Backwater Valve With Single Flap For 200mm PVC Pipe Prevents Flooding Due to Rainwater Travelling Backwards Up the Sewerage System. Suitable for Stormwater Applications. Complies With BS EN 13564
More Info
Ex Vat: £189.45
(Inc VAT £227.34)
Qty:
flexseal retrofit non-return valve 110mm nrv4
Flexseal Retrofit Non-Return Valve 110mm NRV4
Flex Seal Push-Fit One-Way Valve For 110mm PVC Pipe Can be Fitted Retrospectively to Prevent Foul Water Flowing From the Sewer Back into the Property. Available with Stainless Steel Flaps for Added Protection Against Rodent Infestation. Complies With BS EN 13564
More Info
Ex Vat: £55.00
(Inc VAT £66)
Qty:
flexseal retrofit non-return valve 4 inch nrv4clay
Flexseal Retrofit Non-Return Valve 4 Inch NRV4CLAY
Flex Seal Push-Fit One-Way Valve For DN100 Clay Pipe Can be Fitted Retrospectively to Prevent Foul Water Flowing From the Sewer Back into the Property. Available with Stainless Steel Flaps for Added Protection Against Rodent Infestation
More Info
Ex Vat: £75.00
(Inc VAT £90)
Qty:
flexseal retrofit non-return valve 160mm nrv6
Flexseal Retrofit Non-Return Valve 160mm NRV6
Flex Seal Push-Fit One-Way Valve For 160mm PVC Pipe Can be Fitted Retrospectively to Prevent Foul Water Flowing From the Sewer Back into the Property.
More Info
Ex Vat: £76.67
(Inc VAT £92)
Qty:
flexseal double flap non-return valve 110mm bwv110/2
Flexseal Double Flap Non-Return Valve 110mm BWV110/2
Flex Seal In-Line Backwater Valve With Double-Flap For 110mm PVC Pipe Prevents Flooding Due to Rainwater Travelling Backwards Up the Sewerage System. Suitable for Foul Sewerage Applications. Complies With BS EN 13564
More Info
Ex Vat: £75.00
(Inc VAT £90)
Qty:
flexseal double flap non-return valve 160mm bwv160/2
Flexseal Double Flap Non-Return Valve 160mm BWV160/2
Flex Seal In-Line Backwater Valve With Double-Flap For 160mm PVC Pipe Prevents Flooding Due to Rainwater Travelling Backwards Up the Sewerage System. Suitable for Foul Sewerage Applications. Complies With BS EN 13564
More Info
Ex Vat: £96.67
(Inc VAT £116)
Qty:
flexseal double flap non-return valve 200mm bwv200/2
Flexseal Double Flap Non-Return Valve 200mm BWV200/2
Flex Seal In-Line Backwater Valve With Double-Flap For 200mm PVC Pipe Prevents Flooding Due to Rainwater Travelling Backwards Up the Sewerage System. Suitable for Foul Sewerage Applications. Complies With BS EN 13564
More Info
Ex Vat: £243.03
(Inc VAT £291.64)
Qty: