Is it reasonable for the heating company to require the property to suppress the residential pipeline?

Reasonable. The heating company requires the property to suppress the residential pipeline reasonably, because suppressing the residential pipeline can test the air tightness and compressive strength of the heating pipeline, and only the pipeline that has passed the inspection can withstand the gradual heating and pressurization of the heat source under the continuous decrease of outdoor temperature, so as to reduce the probability of water leakage and burst of the heating system pipeline. For safety reasons, the heating company also requires the property to suppress the residential pipeline, so it is reasonable.