Did you put the included zip tie on the rubber to trap connection?
Welcome to the forum. Although you can post in any forum, the USA forum is here in case of local regs or laws
Whats the grey gizmo on the right?
Reply to the thread, titled "Alpha boilers your opinions please" which is posted in Boiler Advice Forum on Plumbers Forums.
We recommend City Plumbing Supplies, BES, and Plumbing Superstore for all plumbing supplies.