Help with holding tank fittings

[AJT-42]

I have decided to not only upgrade from a Jabsco electric head to a Raritan Marine Elegance. As well I am adding a new (extra) holding tank. Would anyone care to comment as to the correct way to connect the fittings to the tank? They come with Teflon tape, would you use 3M 4200 as well?
I intend to keep the original HT as well and fit this one as the master with the original older one as the "reserve". The new one will be lower down in the bilge area. Still thinking about the venting etc. Thanks folks

[peghall]

They come with Teflon tape, would you use 3M 4200 as well?

No. Just teflon tape, NO other sealant.

Be careful not to OVERtighten. Tank fittings are NPT standard, which means they're slightly tapered--too slightly to be visible in such a short distance...over-tightening will put stress on the "collar" that will cause it to crack...maybe not immediately, but soon. So no more than one turn past hand tight plus enough to aim a 90 or 45 where it needs to go...they're self-sealing, so that's all you need. And use only plastic fittings in a plastic tank.

Low in the bilge will make it harder to vent to keep it aerobic...

[HopCar]

Peggie is right, you don't need to goop the threads. In fact with plastic fittings into plastic fittings you probably don't need the Teflon tape, but I'd use it.

I'd love the chance to quote you on the Raritan toilet.