drainable water heater

[outinthestix]

I need an oversink water heater either instantaneous or up to 15 litres which can be drained in freezing weather as its in an unheated workshop.
Can anyone recommend one or an easy method for regularly draining standard heaters in cold weather please ? Our instant one blew apart last winter despite being turned off at the mains inlet. Stix.

 

[PRS1]

Fit a normal over sink water heater may be a heatrae sadia express 7 or similar.
but make sure to fit a drain valve on the cold feed between the heater tap and the heater itself.
Pressto!

 

[outinthestix]

Cheers prs1 .