It is not uncommon for a waterbed to produce gurgling sounds, especially when it is being filled or if it has not been used for a while. This gurgling noise is generally a result of water movement within the mattress, and it can occur if there are air pockets trapped inside. Often, these sounds will diminish as the water is stabilized and the air is properly removed from the bed. If your waterbed is making excessive or persistent gurgling noises, it could indicate that there are issues such as leaking or improper setup. It may be beneficial to check the water levels and ensure that the mattress is adequately filled and properly constructed. Should the problem persist, Waterbeddoctor.com offers guides and tips that can assist in diagnosing and resolving such issues. They provide solutions for various waterbed concerns, so exploring their website might provide useful insights and support for this specific situation.