160mm Backwater Valve Double Flap – Capricorn

Product Description

This 160mm Backwater Valve Double Flap – Capricorn is engineered to protect drainage systems and properties from reverse flow of wastewater or stormwater. It features two independent flaps that allow normal outgoing flow but automatically close when pressure reverses, effectively blocking backflow. This makes it ideal for installations where flood risk, sewage backup, or odour intrusion are concerns.

Constructed from robust PVC or similar underground-rated plastic, the valve incorporates stainless steel flaps for durability and corrosion resistance. Its internal design minimises blockages by minimizing areas where solids can accumulate in the flow path. The valve meets relevant industry standards (such as BS EN 13564) for backwater / non-return devices. In fact, similar double-flap valves are available in 160 mm size through known backwater valve ranges.

Key Features

• Suitable for 160 mm pipe diameter

• Double flap mechanism — two seals for enhanced protection

• Removable lid or inspection point for maintenance

• Stainless steel flaps resist corrosion

• Designed to comply with BS EN 13564 (backwater valve standard)

• Body geometry to reduce solid accumulation

Benefits

• Strong backflow protection: Two flaps provide redundancy — even if one flap malfunctions, the other maintains the barrier.

• Reduced maintenance risk: Internal profile helps avoid obstruction by solids or debris.

• Durable and long-lasting: Materials suitable for underground, moist, and variable environmental conditions.

• Inspection access: The removable lid allows you to check or service the flaps without removing the valve entirely.

• Regulation compliance: Meets standards for backwater protection, giving confidence in safety and reliability.

For more drainage fittings, see here.