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Wanted to drop this pic since there has been comments on "white flakes" showing up in glycol samples. These flakes were on the inside of some of my rubber heater hoses (in this case the short hose connecting the pump to the input on the boiler). I don't know if that's normal or another sign of something going on that shouldn't...just wanted to share.
I reviewed the locations of the bulges and it was a mixed bag...some on the input side and some on the output side. Since the spring clamps have to go on during assembly I'll have an advantage of being able to double clamp everything (that's the glass half full way of looking at it).In an Alde parts catalog they had Loctite 5923 listed and said it's good for threaded and rubber to metal connections. I pulled up the spec sheet but it didn't offer any comment when it comes to corrosion.