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Posted by robert pitzer on December 11, 2006 at 16:21:39:
i have an older hydro therm 180,000 btu boiler with an electro zone control pak with 3 electro zone zone valves i was wondering what i can buy to replace these zone valves, the problem is that they are 2 wire 20 volt dc, .65 amps, and all the zone valves i can find are 24 volt, any advise would be greatly appreciated