hot water supply problem with Worcester 28 Cdi Combi

lance · 29 May 2004

Just had a Worcester 28 Cdi Combi fitted in 4bed dormer bungalow CH ok
but hot water supply slows stops if a coldwater tap on or toilet flushed etc..
is this normal .. mains water pressure is not exceptional and if others in street watering garden worse..
It is the last outlet on the house mains i.e all the other taps draw before the mains reaches boiler (from stopcock to boiler approx 60 ft of piping) would there be a worthwhile improvement if first inline. this option may be expensive because mains enters on otherside of building..any comments or ideas appreciated.

breezer · 30 May 2004

if a tap is turned on when our hot is on, hot turns to dribble (we have a combi)

dont know if its right but ours does do it

joseph77 · 30 May 2004

Hello there,

ah your finding out the joys of owning a combi

AlanE · 30 May 2004

And installed by someone who never carried out the basic checks to see if a satisfactory combi installation was possible.

Alan

Grunt · 30 May 2004

I have a W. Bosch combi in my garage and that is the last appliance fed from the cold water pipes but hot water performance doesn't drop off too much when cold taps are operated. However I did put in a 22mm cold supply to the boiler and everything else is teed off in 15mm.
Perhaps you need to see if you can get a 22mm supply to the boiler.

lance · 30 May 2004

Thanks, The feed from the first stopcock into the bungalow is 15mm and all the hot and cold pipes are 15mm. I am having an additional ensuite bathroom fitted shortly so there will be even more water demands before the 15mm ends at Boiler. The only way I can get 22 mm to boiler is Divert underground from external stopcock to garage on other side of property and cap original feed, is that feasible?.( Digging across front of property would not be problem all needs redoing anyway).
The boiler installation was carried out in the same way British Gas Quoted, but I didn't use them in the end because they messed me about too much. BG approved installers carried out installation.

ollski · 30 May 2004

You need an individual main to your house, the fluctuating pressures on a shared main are incompatible with a combi. Why not look into getting a new main moled in, it's quick and easy with minimal disruption and if it's a replacement for a lead main your water company may connect for free.
What are BG approved installers?, as far as I'm aware the only installers BG approve are BG.

diynot

If you need to find a tradesperson to get your job done, please try our local search below, or if you are doing it yourself you can find suppliers local to you.

Select the supplier or trade you require, enter your location to begin your search.

Are you a trade or supplier? You can create your listing free at DIYnot Local

hot water supply problem with Worcester 28 Cdi Combi

lance

breezer

joseph77

AlanE

Grunt

lance

ollski

DIYnot Local

Similar threads