An ST monsoon Universal twin pump, one excellent pump.
First place to start would be one of 2 things, either the strainers need cleaned and/or the small Expansion Vessel (EV) on the top of the pump needs re-charged (0.9bar for a 3bar twin). Servicing both are covered in the MI.
Thanks so much Madrab. Sorry it took so long but I have been away. I followed the re charging guide in the manual, re charged with a pump and it seems to have worked!!! Thank you so much to everyone who took the time to answer!
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.
Please select a service and enter a location to continue...
Are you a trade or supplier? You can create your listing free at DIYnot Local