Just fitted one of these into the T25, Very easy to fit and shows all of your leaks in seconds by sending bubbles through the liquid. Can test as often as you like and sit next to the gas bottle so easy to remember. Never need to worry whether you have a leak again, Well worth the money!! Mine cost me £50.00 from a marina. Link is http://www.alde.co.uk/itemdetails.php?itemId=53
