I purchased a house recently (built late 2002-early 2003) that has radiant floor heating with zone control valves. The valves are Taco ESP075C2-1. The plumber whom I used to inspect the house said the most of the zone valves were broken and needed to be replaced.

The valves each have a plastic push button and on 4/6 I cannot push in the button, so it is probably true that they need to be replaced.

My question is what are good valves to replace these Tacos? Plumber said Honeywell at cost of $90-100 each.