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Trane system check valves removed ?
Question for all of you vapor system professionals out there . There is a trane vapor system i may be servicing and it has all of the original components still intact with the vent valves , float vents and DRT and check valves . My main question is ; can the check valves be removed since the boiler has been changed to a modern Weil Mclain with a standard pressuretrol and lower water level than the original boiler , and just let the returning water just gravity feed into the boiler even at 2 psi , as all other 2 pipe systems work ? The rads all have traps on them and not trane elbows . The rads also have the graduated supply valves from trane . The system has both dry and wet returns all piped correctly back to the boiler and DRT . Are the check valves necessary anymore due to the hartford loop configuration , the low water line , and possible sludge buildup in the checks . I believe the DRT is not needed anymore along with the checks , Correct me if i am wrong . I will install a vapor stat on the boiler at the very least , i know all about trying to keep the old systems at ounces of pressure . The concern i have is the possible sludge in the check valves causing poor return to the boiler . I am prepared to remove the swing plates inside of them , and the DRT steam connection and bypass if needed . What are your ideas ?