New Boiler- combination a few questions

Hasbeen

If you turn off the stopcock or your switch under the sink that controls the mains pressure cold supply any cold taps fed from it will have no water.

Any taps/toilets etc still supplying water will be from a cold water tank. Some house do have both to compensate for a short term mains water disruption. Cold drinkable mains water to sinks and cold water from tank to baths etc.

Combi boilers usually are fed by mains pressure cold in hot out. No need for cold water tank.

If you have cold tank supplying as such then with a new combi a replumb may be required. If taking out tank.

coffeehound

wilson1972 said:

When i maxxed out the cold tap upstairs in the bathroom the downstairs tap was still fast but did slow slightly so it seems they are on the same system??
I am really confused - there is no way we would have kitchen water from the tank surely?

When you began drawing water from the upstairs tap, the ballcock valve in the loft was opened drawing mains water to top up the cistern?

wilson1972

Just an update, had new boiler fitted today, total cost all in was 2300
The plumber said our central heating water was indeed coming from a water tank in the loft (now removed) he said that he had no idea why they had done that.
All working great now, new boiler with hive and love it.

Jeepers_Creepers

Thanks for the update. Great result