ariston plumbing set up

[stanman1]

Hi all, could anyone give me the pipework layout for an Ariston undersink electric water heater. Its the 3kw version as stocked by B&Q. it comes with a pressure relief valve and i do have an expansion vessel but im not sure if i need more valves to incorperate this in the system. any help or advice would be greatly appreciated. best regards, stanman

 

[ShaunCorbs]

what size?

 

[Howsie]

I presume you've tried their website?

 

[ShaunCorbs]

I presume you've tried their website?

in the mis

 

[Dotty]

As above, what size in litres?

 

[stanman1]

i havn't tried their website, i thought it would be easier to ask someone on the forum for the advice. its a 10 litre undersink 3kw, thanks

 

[stanman1]

i couldn't respond to anyone earlier i got stuck in a traffic jam for four hours!!

 

[JCplumb]

Expansion vessel may not be needed, depends on the length of pipe that exits the heater. It will all be in the MI's that come with it.
PRV is 100% absolutely needed though and care should be taken so that if the PRV does go, the released hot water isn't going anywhere that it could scald someone. Again though it will be in the MI's
The jury seems to be out on whether or not to fit the di-electric jobbies as they can be a pain to seal, just get some loctite on them and there should be no issues. The warranty will definitely be void if you don't fit them.

 

[stanman1]

i cant see any mi's in the box, thats the reason i have tried this forum for info. please could you explain DI -electric jobbies? thankyou

 

[JCplumb]

They're plastic bridges that go between the heaters inlet/outlet and your pipework, they're there to limit corrosion within the heater.
Not sure if all of these types of heaters come with them or not, maybe some manufacturers have them built in - infact, if they don't I could probably patent that idea...

 

[JCplumb]

Here's a link to the MI's for an Ariston 10l 3kw undercounter heater.
It shows the di-electric jobbies and explains everything you need to know. Shouldn't be hard to find your heater if these MI's are for a different one.
http://www.ariston.com/uk/media/files/458_EP%20R%20Manual.pdf

 

[stanman1]

Cheers jc much appreciated

 

[Howsie]

It would have been easier if you'd looked on their website TBH. It was the first thing I found when I searched using your question.

Let me google that for you

Might save you a bit of time and frustration in future.

 

[stanman1]

Ariston fitted and working lovely. Just got to fit tundish now. Thanks to everyone who helped with advice, Best Regards, Stanman

 

[stanman1]

hi all, back again, after rereading the mi's again it now seems i have to fit an expansion vessel because the mains pressure here is too high and i had to fit a pressure reducing valve. it states vessel MUST be fitted when fitting prv. Is this a job a could tackle myself as i'm not too sure about these expansion vessels. i know i have to fit a non return valve in the system as i can see from the drawing but the vessel i have does not seem to have anything other than a large thread at the top ! do i need a shroeder valve (ive heard mentioned) or any other parts? regards, Stanman

 

[SmokeyJ]

No need to touch the schrader valve side of the vessel. Will need a 1/2" female iron to convert the vessel to copper.

 

[Riley]

And I would strongly recommend that you don't run the water heater until the expansion vessel is in place

 

[gassafe]

These things are a real pain!! All the controls of an unvented cylinder for a measly 10 litres of hot water...

They suggest there compact & fit under a sink but when you have a check valve, pressure reducer, expansion tank & relief valve all under a kitchen sink it's a real pain!

The last ones iv fit I just do the heater & the relief valve out the wall! Never had a problem that way as there always seems room for it to expand back down the pipe...

Another thing I hate is how they don't supply and mics or fics for the heater or relief valve... Why not just make them with compression nuts!

 

[Unregistered]

after watching the youtube video as suggested earlier, i reran the pipe work and fitted the non return valve and expansion vessel. ariston is working ok now and i just need to fit the tundish which shouldnt take long. thanks to anyone who offered advice. best regards, stanman