We replaced our Torrid water heater, identical to as-described by Richard, in May. We experienced the same issues, not available anywhere and Torrid was out of stock. The people at Environmental Services did estimate getting a shipment in six weeks, and at least one of that model heater was NOT already sold - so we got our name put on that heater. The shipment did arrive, we paid for the heater, and a week later had it in our hands.
The new model did not exactly match the old one in that the engine coolant line in/out was a single fitting for two hoses located low on the heater while the new unit had two fittings, one at the bottom of heater and the other 2/3 of the way up the heater. This placed the upper fitting *above* the Cummins coolant cap, creating an air bubble in the coolant line. To correct this we installed a 1 gallon coolant expansion tank obtained from Sure Marine Services (good shop in Seattle), moved the Cummins 15 PSI coolant cap to the new expansion tank, and placed a 20 PSI coolant cap on the Cummins.
Torrid is still there, good people, but clearly a small niche shop and they (and/or their suppliers) have difficultly keeping up with demand.
rob
Roadrunner
2007 Selene 49 deep hull 48-029