Was a bit difficult to replace - Bypass bleed valve Valve clips were difficult to get out - Make sure you depressurize the water in the system first. Do yourself a favor and reinstall with flexible hoses, it makes the job a lot easier. I had problems with one of the insulating thread adapters leaking despite being wrapped in vinyl tape. After the third try, the plumbers put the putty in the threads, and it helped - we recommend starting with this. Coated the new o-rings in petroleum jelly to make installation easier.
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