We have had to remove the forward holding tank in our 1995 Carver 440 aft cabin. Before I order a replacement tank, I am hoping to get some suggestions on which tank manufacturer would provide a safe/reliable replacement product. I have looked into Dometic, bu the sizes are limited.
Get the old one out first. You may find the part number on it from Todd, Ronco or US Plastics. At least, you will have the EXACT dimensions and connect lay-out. Have you contacted the factory? They may be able to offer the part number and vendor.