i will install this myself. it will replace an oil fired boiler. i will use the old manifold and zone valves. i simply do not like the noise of the oil boiler. i can buy a 350 pound crown boiler for an easy replacement, basically put it into place on the concrete pedestal and hook up the 2 1 1/4" lines and the 3/4" supply line. easy hook up to chimney. i can also buy a trinity 80 pound wall hung boiler/domestic hot water unit for twice the money and a significantly harder installation. the cast iron unit is 80% afue; the wall hung is 92% afue. WE ARE USING LP. i suppose the cast iron will last about 25 years and i suppose the wall hung about 15 years. more repairs with the wall hung. i am inclined to go with the cast iron and pay 12% more per year for lp gas but gamble on longevity and fewer repairs. any advice would be greatly appreciated.

I read the sticky but am confused. Please forgive me. I fill my system up to 20psi and after a few days it falls to ~10psi. Can someone suggest the steps I should follow to check for leaks?