Plumbing

Fresh Water

How to commission your water tanks
Keeping the tanks fresh
Plumbing Modification
Two discussions on controlling the hot water temperature: Hot Water Heating, Hot Water Temperature
Water heater doesn't heat when motoring
Winterizing your hot water tank More hints in the Maintenance Section.

Galley

The galley sinks and ice box share a common thru hull drain. Here are a couple project to improve them.
Back of sink access hole by Lance Jones
Sink and Icebox Drain
Galley Sink Drain

Head

Head (takes you to a separate article list)

Holding Tank

Holding Tank Vent Be the first to contribute to this topic!
Macerator Be the first to contribute to this topic!
Holding Tank Smells Be the first to contribute to this topic!

Thru Hulls

The Catalina 34 was typically manufactured with Marlon thru hulls. It's important to regularly inspect and operate your boats thru hulls.
Here's one persons view on them.