Backflow Valves (110, 160 and 200mm)
Flood Protection Valve for Waste pipes 110mm, 160mm, 200mm
This superbly engineered backflow valve prevents backflow automatically and fully meets EN13564-1:2001. CE marked.
The valve opens to the full diameter of the pipe, so not reducing the open area available for pipeflow, i.e. it does not restrict flow. This high open area helps to minimise the risk or possibility of blockage.
The backflow valve lid can be removed for maintenance and clearance if necessary. A top lid closure lever also allows the valve to be locked shut if required.
This valve is superior to many on the market. It will work as a rat block, or rat-blok, as it has the metal face. It also works to prevent odours and unpleasant smells moving back up the drainage pipes.
The valve internal face plate is steel faced. This top quality valve is suitable for rainwater tank overflows, and of course for foul and stormwater drainage.
It is an effective anti-flooding device when installed on properties susceptible to flooding from rivers. Double flap versions are also available.
Material : Polypropylene, with stainless steel valve plate and rubber seals.
Always plenty of backwater valves in stock, we will not be beaten on price for this model.
Available guidance recommends you protect your rainwater harvesting tank from backflow surges. Many manufacturers do not offer a backflow valve as standard. The devil is always in the detail, it all depends on the gradients, the falls in the drainage pipes, the size of the soakaway and factors like groundwater eleavtions and levels. What is known is that allowing groundwaters or flood waters or even sewerage waters to pass back into your undergound rainwater tank can have undesirable consequences for a rainwater system.
These issues also apply to septic tanks and waste water tanks too, where biolgical treatment systems can be interrupted.
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