isolation valve insanity?

keyote

what do you think I have the taco zone valves coming off the supply manifold, and caleffi flowsetters going into the return manifold just upstream of the webstone purge valves. I also have webstone drain valves on the pumpflanges and boiler unions s/r outlets. Now im think what if i need to service the flow setters or taco zone valves [ i think the tacos are usually able to service by just control switch out] and wonder if i should add valves upstream of flowsetters and down stream of taco zone valves is that crazy or just first rate ? these caleffies have spring checks i worry might clog how likely is a taco zone valve brass portion likely to fail?

Paul48

What time is it?...Nah JK Honestly, the components are built to be very durable, but they do fail. You can never have enough isolation valves, and you'll always wish you had another one when you need to use them.