Hot Taps Connected to Electric Water Heaters - 3 feeds?

[JSPM]

I need to change taps in a commercial premises. The hot feeds on the monoblocs are connected to electric "HeatRea" water heaters. Therefore there a two feeds into the the base of the tap from the heater for the hot, making three in total; including the standard cold feed.
I have yet to take the taps off to inspect so I thought I'd ask advice first as it is a time critical job, i.e. overnight.
So do I need to purchase a special tap for such a feed or can I link the two heater outlet pipes/tap feeds into one pipe first and then connect as you would for any "normal" domestic tap?

 

[migoplumber]

can only assume without further information, that the tap has the join between the hot secondary flow and return, directly below. hence the 3 pipes!
if this is so, then standard taps are fine.

shaun

 

[danielp]

nope u cant these are special venting taps that drip most of the time if you do connect to an ordinary tap the heater will blow up , the tap has a rod that goes through the tap body and fitting underneath so no washers ! , also the bottom connection on the fitting connected to the tap is cold main in, the next one up is cold to heater and the one above is hot from heater

hope this make sense and helps !

forgot to add same principal for the tap with flexible hoses from bottom just got to read what ones go to what

 

[migoplumber]

nice one daniel, ive learnt something else today.cheers

shaun

 

[stevetheplumber]

nice one daniel, ive learnt something else today.cheers

shaun

suprised youve never come agross these shaun what they actually do is shut the water supply to the electric heater and leave an open vent frrom heater to tap
its like a remote over sink unit thats how i work out what goes where im my head

 

[JSPM]

Super thanks for that danielp. I think it makes sense i.e that heater needs a vent for the stored water. The problem the client has is that the the taps are old/knackered and drip most of the time / have trouble turning off.

So any ideas of a good mail order co. / national trade co. that can supply such suitable taps?

 

[Plumbstar Tom]

Hi

I just fitted a Vented tap and asked a simlar question here before fitting as I was unsure on the matter and found some useful information on the web

I fitted a Santon from Plumbercentre and the instructions clarified what I found on the Web

 

[Avatar]

Heatrae do their own vented tap kit for about 90 squid - ouch!!!

 

[flat pack]

a type of unvented hot water
don't you need a ticket to work with this

 

[Plumbstar Tom]

Only if its over 15 litres isn't it?