need a diagram of a vaillant mag 125/7 water heater for a campervan think there is a screw or plug missing any help thanks

ssuebarber@aol.com, November 2008

vih 120 diaphram 443-995. 30gal. heater. can i still purchase this part.

PAUL DARMENTO, June 2012

Hello Ray
Read all the replies and requests on your forum.
I also have one of these reliable boilers, and recently the boiler pilot light would not stay ignited
I replaced the thermocouple with a universal one, but to no avail.

Did not realise it could be water pressure problem.

This is just a water heater and not used for central heating.
Only a shower and sink.

Can you advise.

tony the ferret, September 2010

Hi Ray,
I am sure you must have been inundated with similar requests and beg your patience in listening to my plea for your help.
I live in rural Spain and have only the local plumber that can/will help with installing my old water heater in the finca so that at long last I can have hot water.
My heater is a Vaillant Mag 125/7 and the fact that it has three water pipes has completely blown away my little man!
I guess one is inlet, one is outlet and the other must be for a tap if it is mounted over a sink.
I tried emailing you at golikearocketmail.com and can't succeed and I really need to see a labelled diagram of the inside, so that I can guide the plumber. Talk about the blind leading the blind!!!
Many Thanks.
Jeannie x (sigmagraphics1 at gmail.com)

Jeannie, November 2009

Ray, would it be possible to have a copy of the diagram, my mum's heater needs attention in her caravan,any help would be appreciatted.
thankyou.

mick, November 2009

Hi, we are trying to turn the heat on and it is not working. The pilot is on. The air is out of radiators..., The thermostat has been lowered and then increased . It makes a brief lighting sound but then, it goes off. What else can we do?

PS Not sure where the "electric switch" is????

Ary, October 2009

ray would it be possible for me to also have a diagram i would so grateful thanks

lee, April 2009

Hi Ray , i saw your advice on the mend it site and wondered if i could also have a copy of your Vaillant installation manual as well please. Mine has not worked at all since we have had it and its about time i give it a look.
thanks

Talbo, March 2009

Hi Ray,

Saw your offer of help on how to mend it site - and wondered if you could help me with my problem below:-

I have a Gas( Butane) fired Vaillant Boiler that appears to restrict the water pressure through its valve to an extent that won't allow the burner to 'fire-up' fully if not at all.

I've opened up the water valve and checked the diaphram and all its water ways for blockages - which all appear to be clear and fine.

I thought I may have put the main spring acting on the diaphram on the wrong side - tried both ways to no effect .

Do you have any ideas of what may be wrong ? or an 'exploded' assembly' of the water valve and its assocaited components and how they should fit to-gether ?

Many thanks - in anticipation of your help/assistance.(my e-m :- allshepherd@yahoo.co.uk)

Allen Shepherd

Allen Shepherd, January 2009

Hi, email me at golikearocketmail.com i should be able to scan you a copy of my installation booklet which has a diagram in it.

RAY, January 2009