I've finally (after 3 months) had a reply from Whale pumps regarding the noisy onboard pump in Senators. They say:
"One reason identified for the noise is if a small rubber non-return valve is present in the Watermaster socket on the outside the caravan. This is not supposed to be there and we did identify that a number of caravans were sent out from Bailey's with this valve present.
Please check your van to ensure this valve is not present. If there is a valve there, please remove it."
I haven't checked mine yet but I'm passing the information on for the benefit of others. Any comments gratefully received!
"One reason identified for the noise is if a small rubber non-return valve is present in the Watermaster socket on the outside the caravan. This is not supposed to be there and we did identify that a number of caravans were sent out from Bailey's with this valve present.
Please check your van to ensure this valve is not present. If there is a valve there, please remove it."
I haven't checked mine yet but I'm passing the information on for the benefit of others. Any comments gratefully received!