I have a completely different question - does a hot water cylinder need to be sitting on an overflow tray to be legal?? 

Thank you !!  ;-)

Linkback: https://www.plumbers.nz/q-and-a-hot-water-cylinders/44/do-hot-water-cylinders-need-to-be-sitting-on-an-overflow-tray/1879/

hi guys,the way i read it is, if it was in a position where it would cause damage to another property if it leaked/burst, then a tray with an overflow to direct the water to the outside is necessary,cheeres

I have a completely different question - does a hot water cylinder need to be sitting on an overflow tray to be legal?? 

Thank you !!  ;-)

under AS/NZS 3500  safe trays are only required in a building where there are multiple occupancy's...like a flat above another flat where a cylinder leak will have the risk of damaging someone elses property...in a two stroyed single dewelling you dont have to install a safe tray cus you only run the risk of damaging your own property...saft trays are not required by code in single occupancy dwelling's...

Just found it...AS/NZS 3500:4  5.4 PROTECTION AGHINST DAMAGE FROM LEAKING WATER.........5.4.1 NOTE:In New Zealand safe trays are only required where leakage could result in damage to another occupancy in the same building.

Hope that answers your question.