Installing a Lavac Toilet with Nauta Waste Tank - Albin Ballad Refit Part 3

Step by step description of installing a Lavac vacuum type marine toilet and a Nauta waste tank. You'll notice a maze of plumbing with 3 Y-valves here that's needed to allow the toilet pump to go either direct overboard discharge or into the waste tank or to allow you to pump out the tank direct overboard when offshore or to use the deck pumpout fitting at a marina. If you don't need to pump the waste tank overboard yourself then it can be simplified with only two valves. The plumbing diagram is seen at 11:07. Parts Used: Lavac toilet (When ordering you'll need to know which pump version you will use. The one they call T/A is for surface mounting on top a bulkhead with hoses exposed. Model U/D is for mounting within a cabinet and hides the hoses. Here we use the U/D model. Here's a supplier for the U/D at $765 although the picture shores the wrong pump. I used to get these for under $500 but prices have gone way up recently. They are more commonly available in the UK. Here's a US supplier: https://www.fisheriessupply.com/lavac-toilet-popular-model-manual-toilet/tlz0802 3 Forespar Y-valves 1.5" vented loop 5/8, 3/4 and 1.5" hoses and clamps. I used Shields 148 hoses but you could use a more odor resistant marine hose for the tank connections where the waste water will sit for extended periods. Thru-deck vent fitting West Multi-Caulk for hoses Lifecaulk polysulfide for seacocks 1.5" and 3/4" Groco bronze seacocks. The reason I don't use Marelon seacocks is because the handles are flimsy and when the seacock has barnacle growth in it then it jams and the handles break off. Nauta 14.5 gal tank and fittings Notes: To be legal in US inshore waters you need to lock the y-valve in the waste tank position. I use a cable zip tie that's easy to cut and replace. If the y-valve handle doesn't have a hole in it then I drill a hole to pass the cable tie through and then around the hose to secure it. The bilge pump has an inspection port that needs some silicone lubricant on the o-ring so that it doesn't jam or leak. An alternative to this installation is to mount a tank up high for a gravity feed discharge but that is not practical with the limited space on most small boats. We can be reached at atomvoyages.com or if you have a classic sailboat and want to share your experiences or have questions on fitting out, consider joining the Plastic Classic Forum at https://plasticclassicforum.com/forum/ I'm a moderator on the forum and answer questions there.