Home » Tony’s Tips » Articles » Repowering your Boat » Best Locations to get Water Flow for Shaft PackingsBest Locations to get Water Flow for Shaft Packings Your heat exchanger makes an excellent place to pull a water hookup to draw seawater for a packing gland The two below images have the extending hookup at about a 2′ o-clock angle on your heat-exchanger for easy routing of a hose to your shaft packings. Pictured above is the backing plate of your heat exchanger