Downstairs where sump pump is located there is a canplas air admittance valve beside the sump pump for the hub drain only. The sump pump is vented out of the roof. The gas piping in attic space with the stainless steel tubing is correct you should not ground gas with power. Also made repair on overflow and Jacuzzi tub upstairs. Also added vacuum breaker to backhoes bib . Laundry room sink was loose tightened it up tested OK