Hey,

I have 2 of these units installed at home. One of them is making a hissing noise which appears to be coming from around the Safety Drain valve area. Then are no signs of any leaking.
I have opened the Safety Drain valve a little & it works fine, & the hissing noise changes a little, but then becomes the same when I close the valve.
All the other functions of the unit are working fine & we are still getting a good supply of hot water.

Any ideas?..... :confused:
 
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