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Ariston under sink heater, help!!!!

View the thread, titled "Ariston under sink heater, help!!!!" which is posted in UK Plumbers Forums on UK Plumbers Forums.

Riley

Plumbers Arms member
Plumber
Gas Engineer
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Morning all

trying to fit an undersink water heater for custard in a flat.

Only position for it is in like an old airing cupboard in the centre of the property in the bathroom.

Now ive just spoken with ariston as I wasn't sure about PRV termination and they don't endorse termination through waste pipe. I'm really confused as ive seen loads of these and cylinders terminated via a hepvo into waste. Were these installs all wrong or was the guy at ariston talking rubbish?
 
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G3 Regs let us use HEPvO valve for unvented hot water discharge as long as it’s acceptable by your local Building Control.
 

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