Fix for a vac that has little suction ....Look under first step..where the hose attaches to the connection..I removed first step and found that the connection with fittings that adapt to hose connection was not attached..the connectors that are used by Heartland will not work ..so they never bothered to connect them .I removed the connector ( inside adapter piece)in side of step and connected hose from vac directly to white connector on side of step..I wrapped the end of this connector with tape to increase the diameter so hose end would fit this connector and tightend clamp .Vac.suction now is unbelievable..