Morning chaps. I've just been to look at a "simple" job. Customer is opening a new shop and just wanted their sink moving from existing to new shop. Only problem is they only have mains water, no facilities to heat water (they didn't realise this) so I'm now trying to sort out a heater for them. 15 litre isn't big enough, 30 litre over sink should just about be enough. But for that price I could get a 90l direct invented cylinder. My question is do I still need a 2 port on a direct cylinder? I can't see that I do as it'll just be off immersion and will still have a t&p valve but I am being thick and questioning myself. Surely mains in through multi function valve, hot water out as normal discharge pipework coming from prv and t&p valve will cover it. Or am I right to question myself.
