I assume everyone saw this post? 71Cayo for sale...I posted that it appears to be collectors level coach..but 69 is so right...check for rot.
Excellent camper, very much original.
The drapes and the upholstery match mine. I never thought mine were original but that's too much of a coincidence.
Looks like someone added an outside electrical outlet. It's otherwise stock.
A couple of things.
If you're just pumping greywater, a shower pump like the Whale Gulper 220 is going to be a better choice than a macerator. Lighter, smaller, less power, faster flow, more reliable.
For blackwater you need a 3" gravity discharge line to deal with clogs. The marine guys get away with 1.5" because they use toilets with a 1.5" discharge and macerator features of their own instead of rv toilets with a 3" discharge. Sure you can use a 1.5" line to the macerator and it will usually work but if your grandkid flushes a great big ball of TP or a pair of underwear then what.
With that said the space taken by 3" plumbing is considerable and the availability of things like 3-way valves in this size is limited; what is out there is high buck. So I would suggest keeping it simple. You can use a short section of dump hose to connect the macerator inlet to the gravity drain and save yourself some complicated valving and piping. At which point you might want to use 3" cam lock fittings for your gravity dump connection instead of the more common valterra bayonet as the cam locks do not require turning the hose to lock it.
I am knee deep in $hit and frankly a little tired
thinking about it. What do yall think about
macerator pumps. The plan I am contemplating
would put a macerator right below the toilet.
and then with interesting valving dump either
into a transfer tank, as yet to be determined, or
out through a simple 3/4 inch water hose. The
gray and transfer tank(black) could also be
plumb and valved to the macerator intake allowing
a discharge of a varity of things as needs change and
clean the system.
Macerator pumps are more widely used on boats than RVs. There are some things to bear in mind:
1) They will clog and jam on tampons and on any rags or scraps of cloth that are inadvertently flushed.
2) They are heavy and produce vibration. Be sure that they're properly supported by something other than the piping, and use flexible connections to avoid damaging the piping from vibration.
3) They fail fairly often with the marine crowd reporting that replacement every 1-2 years is not uncommon. Plan your piping so that there is good access for replacement.
4) They draw a good deal of power, around 20a, so size your wiring and switch accordingly.
I considered going this route and ultimately decided against. I do have a "sewer solution" -- the water-jet powered macerator type pump -- which I use when dumping at home where I have city water available and a slight uphill run to the drain.
Another possibility to consider is a "shower pump" -- for greywater only. There are some clog-resistant diaphragm pumps that look promising for this.