Has one have a One and half inch hose pipe 2 to 3 feet long.
Need it to unblock a air buble in the cold water tap.
Tried draining the system but didn't work, last year a plumber fixed same fault with using this hose pipe - hot water forced into the cold water tap.
Can't see any at B and Q, even asked at the dump.
Will cover postage or if you want more that ok too.
Say 3 pound (to keep with the rules)
Thanks for looking.