Is the pump positioned correctly? It is possible for pumping over to occur if the feed and vent pipes are separated by the pump. Check the configuation of the system, most modern systems use the H configuration with the pump positioned to give positive pressure. But, as someone already asked - has the system previously worked? And if yes, what has been changed?Oldone said:Hi Gents,
An old lady we know has the above problem can you advise please.
If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.
Select the supplier or trade you require, enter your location to begin your search.
Are you a trade or supplier? You can create your listing free at DIYnot Local