I am replacing a discontinued Weil Mclain VHE, Series 3 boiler, 100,000 BTU. It is a LP-fueled, 2-zone residential baseboard hot water system. My plan is to leave the existing loops in place and replace the VHE with the GV90+4 boiler, 84,000 BTU. I would have a professional install the unit, but for whatever reason, all 4 contractors I have contacted for quotes on the boiler w/installation have been unresponsive. My contingency is to understand the installation, in case I have to order the GV90+ on line and do it myself. My question relates to information from the GV90 manual I accessed online. The supply to the system looks to be a stainless steel tube, 1". The manual legend indicates 1" NPT, but the photo appears to show an un-threaded stainless tube. Does anyone have experience with this boiler and what fixture that would connect the boiler output to the system? I want to ensure no special tools, such as those required for some solderless connectors are needed for the GV90 boiler. Thanks in advance for information.
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