The Tank › Help needed – can't get water into new water heater › Reply To: Help needed – can't get water into new water heater
I can see how you’d connect the cross-connection with the water heater problem — both happening at the same time. But they probably had nothing to do with each other.
I wouldn’t have suspected the drain valve on a brand-new heater, but it’s something to remember that what comes on nearly all heaters is junk, never meant to be used. If you haven’t already, go to the Basics section of my site and read up on anodes, sediment and such. Larry pioneered the concept and the site reflects his thinking.
So the tank was probably full all along, but the drain valve wouldn’t let any water pass, so you thought it was empty. That the top fittings could leak and that the T&P could spurt water said to me that the tank was full.
If you have a similar problem with the next heater, replace the heat-trap nipples with plain, plastic-lined ones. They can prevent water from exiting the heater if they malfunction.
And it’s always a good idea to replace the drain valve with a brass ball valve drain assembly. That can easily be done when the heater is empty, before installation, and then you’ll know it will work when you need it.