Mad Robin, I already gave you the advice about shaking the pump but you ignored it and rang Salamander anyway.
Plumber hasnt fitted a wessex/essex/susses/sex flange at all the hot supply is taken from the hot feed from the tank... albeit he has 'T'eed into it low down almost at the floor of the cylinder.. Should I fit a essex on the side or a sussex on the top Salamander say it has to be a essex with a gravity loop! Uh? :O
Mad Bobbin is trying to WING it innit? He fitted it, now he's blaming the 'plumber'? am i missing sumfink??????
Nah, Mad Robin is a dafty DIY'er meddling with a perfectly good installation and making things worse!