My AquaSmart doesn pump much water and is noisy/splutters?
Air being sucked in before pump. Check all connections are secure, check filter is firmly screwed on, check filter sealing o-ring is in place inside the filter fitting, tighten the four screws in the blue plate in the Whale Watermaster socket, check the Carver/Truma socket bung is fitted fully inside the angled channel, check water is in the tank.