PPH Flue Non-return Valve 110F/100M with Siphon
Heating equipment planned for use with positive pressure, collective flue systems always require a non-return valve. The primary function of a non-return valve is to prevent backflow of flue gases from active appliances on the system into any non-active appliance. Cases for this solution is that the heating device is suitable for operating under positive pressure. If heating appliances do not have factory-fitted, internal non-return valves then a non-return valve needs to be installed at the outlet of the heating appliance, in the gas flue system.
Before using a non-return valve it must be proved that:
1. The heating appliance can deal with a positive pressure system in general
2. The non-return valve doesn’t have a negative influence on the functioning of the heating appliance.
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