Thetford vs. Sealand

[labufbabe]

I need information about a portable toilet for my dad's boat. It's an older custom sailboat with no head, but a large closet that will work for a portable toilet. Don't ask what we are using right now..ugh.

We've looked at all the features and benefits, costs, etc. and narrowed our search down to two:

Sealand 976 and a Thetford 735. Any input would be appreciated.

Thanks a bunch.

[camaraderie]

I can't find the spec on the 976...but I assume similar to the 975. I would get the larger capacity unit....you can never have too much capacity!!