central heating

[BOB EMBLETON]

there is no hot water or very little hot water for a bath. i have a Parkray solid fuel fire which heats the water the radiators are red hot ,but the hot water has gone warm and after one bath goes cold

[buildersmate]

Do the two pipes that go into the side of the hot water cylinder (usually one in the middle and the other towards the bottom both feel hot, or are neither hot? Do you know if there's a pump that feeds water to these two pipes (or does it work without a pump - called gravity feed - common on systems designed up to say 20 years ago.