Vaillant Ecotec 837 Plus Flow problems

joeseppy · 19 Jul 2010

I had an Ecotec 837 Plus combi boiler fitted three years ago and have never been happy with the flow that I am getting. I have recently fitted a new Aqualisa digital shower and the flow isn't great.

I have tested the flow out of the bath taps and am getting approx 9l per minute. Can anyone please offer any advice or things I could check to increase the flow rate being acheived.

plummerman · 19 Jul 2010

What l/m do you get from the first cold water draw off in your house. ( usually kitchen sink) You need to know whats coming in before you start looking for problems elsewhere.

Could be you've got crap incoming flow an plumber never checked before fitting

joeseppy · 19 Jul 2010

11.25l coming into the cold kitchen tap. I am suddenly seeing the wood from the trees. Sorry I'm a slow learner

Is this lower than normal. Is there anything I can do about it ?

mickyg · 19 Jul 2010

you can depending on circumstances:
- run a new bigger bore main from the road
- install a booster set on the incoming supply (big, makes noise)
- install an accumulator on incoming supply (even bigger, no noise)

incidentally what wally installed an 837 when you only have 11 l/min?

joeseppy · 19 Jul 2010

What is involved with regard to time, cost and disruption running a new bore main from the road ?

I don't like the sound of the other two.

I now realise my plumber was clueless.

mickyg · 19 Jul 2010

dig a trench, put a big bit of plastic pipe in it, get water board to come and connect it, fill hole. The only difficult bit is liasing with the water board.
Obviously if you have a tarmac drive or blockwork or something then you got bigger worries.

joeseppy · 19 Jul 2010

Thanks for your help. I have a concrete drive so it doesn't seem possible just now as I can't afford to replace it.

Is it worth phoning the water board to ask if there is any way that they can increase the supply flow ?

kevplumb · 19 Jul 2010

Thanks for your help. I have a concrete drive

can't you go down the side ?

the new pipe does not have to follow the route of the existing one

joeseppy · 19 Jul 2010

Unfortunately I don't have a side. Driveway out front which the incoming pipe is underneath. There is a gravel area out the front as well which would be the better option but how do I tie it into the existing supply ?

joeseppy · 19 Jul 2010

Thanks for the help, you have given me a couple of options to explore

mickyg · 19 Jul 2010

there are companies that do a thing called moling. Self explanatory really. Not sure what it costs though.

Corgigrouch · 19 Jul 2010

Before you dig up your drive... Do make sure that your stop cock is fully open.

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Vaillant Ecotec 837 Plus Flow problems

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