Pearson Yachts Forum

General Category - Pearson Owners and Enthusiasts => Cruising => Topic started by: Dolce_Vita on August 27, 2018, 11:33:33 PM

Title: Type I MSD
Post by: Dolce_Vita on August 27, 2018, 11:33:33 PM
I am seeking the advice of the collective brain trust.

A major limitation on our last trip down the ICW was the need
to constantly (every two days!) find a pumpout station due to the
small size of our holding tank (10 gal).

One of the things that struck us while in the Bahamas was
the freedom we had to anchor somewhere and stay as long
as we liked because we were able to pump overboard.

In an effort to achieve some of this flexibility while
in the U.S., we were planning on installing an ElectroScan
(a type I MSD) in order to be able to treat our waste and
legally discharge it overboard (except in specially
designated "No Discharge" Zones). There are lots of these
up North, but only one or two small ones here on the
Chesapeake, and a couple on the coast on the way South.

With time running out for our next trip South this Fall,
I was just about ready to purchase
the needed equipment and supplies and start tearing into
the boat, when I discovered that ALL of the Florida keys
are a No Discharge Zone!! Since our current plan is to
spend the winter in the Keys, I'm starting to wonder if
we're past the tipping point in the cost/benefit tradeoff.
I'm estimating about $2500 in materials, and a lot of work
to get it done in the next 5 weeks.

So, now we're faced with a dilemma. Do we

1) Proceed as planned, knowing that we'll still need to pumpout
the whole time in the keys?

2) Scratch the MSD and just deal with finding pumpouts in the
Keys and everywhere else in the U.S.?

3) Scratch the MSD and the Keys, and go back to the Bahamas for the
winter, hitting Eluthera and the Abacos (which we missed last trip)?

4) Do something else we haven't thought of?

Recommendations welcome and eagerly sought after!

- What is your experience with finding pumpouts in the Keys?
- How often do you need to pumpout?
- Any opinion on the future viability of Type I MSDs?
- What about composting heads? (The Peat-Moss needed may be
hard to find in the Bahamas.) And you still need to deal with
handling and disposing of the liquid.

Thanks in advance!
Title: Re: Type I MSD
Post by: Rusty Pelican on September 01, 2018, 09:53:07 AM
The age old question that has perplexed us Humans since Eden.
The options are very limited.

Reading your post, i would recommend replacing the 20 Gal bow tank with a custom build holding tank in the 30gl range in conjunction with a macerating head/pump. This option is just "extending" not solving the problem, it just gives you more time between some type of action.
Up here in the NE, everywhere is a no discharge zone

The "Human Kitty litter" heads are a pain and smell.
Good Luck

Title: Re: Type I MSD
Post by: Dolce_Vita on September 01, 2018, 01:54:38 PM
We have the 40 gal bow water tank option, and need every gallon of that when we're in the Bahamas!  This only left room in the bow for a 10 gal holding tank (these are all OEM).

I agree with your thoughts on the composting heads, though I have no experience with them.  I just don't want to be getting that intimate with my waste on a regular basis.  It strikes me like going back to an outhouse from a flush toilet.

I'm in the process of trying to add a macerator pump to our existing tank, so we at least have the option of heading 3-5 miles offshore to legaly pump out our tank.  Right now we have no way to empty the tank without a shoreside pumpout, and those were often hard to find.
Title: Re: Type I MSD
Post by: Rusty Pelican on September 01, 2018, 08:48:13 PM
An electric head with a macerator may well be your solution..Or..
Just a thought, maybe down size the 40 gl to 20gl or so, expand the holding tank, go the macerator route and explore water capture systems.
Does it rain much in the Bahamas?
Title: Re: Type I MSD
Post by: Dolce_Vita on September 02, 2018, 10:14:30 AM
Water capture is only practical if you go in the summer, wnen it rains a lot.  But its way too hot then.  We go in the winter when it hardly rains at all.

I've got a Jabsco macerator pump on order, and the stainless stud upgrade kit (the original studs would corrode and leak within a year). Still haven't figured out an installation plan yet.  Space is really tight on the 323 up there.  I'll heep you posted.
Title: Re: Type I MSD
Post by: Eddy on November 28, 2018, 01:28:53 PM
This is several months old but wanted to share as I have the lectrasan on my boat. For this to work properly in anything other than water with a high salinity like actual seawater you'll have to inject a brine solution to get enough salt for it to work correctly. If you don't have enough salt not only does it not sanitize the waste it will cause the electrode pack to fail. This is a hassle as it takes quite a bit of brine in the Chesapeake.
I'm considering the airhead to replace this .. has anyone used a composting head that could provide some insight on how well they actually work? I've spoken to one person who bought a boat with one installed and they weren't happy with it and ended up replacing with a holding tank arrangement. It was a large catamaran and they were a family of 4 with frequent guests so not really a fair test with that many people on board.
Title: Re: Type I MSD
Post by: Dolce_Vita on November 28, 2018, 10:31:24 PM
Sorry the promised update on this took so long.  We've been on our trip down the ICW since mid October.  Just got into Ft Pierce FL.

I managed to sandwich the macerator pump into the narrow space between the aft side of the holding tank and the plywood-backed liner wall. Doing this required removing the pump head and rotating it 180 degrees to get the 1" outlet barb pointing down.

By tee-ing the pump's output into the line to discharge seacock, and teeing it's input off of the line to the deck pumpout, I got a system that requires no additional Y valve.  As long as the deck cap is in place, the pump develope plenty of suction to empty the tank.  As long as the existing Y-valve is set to direct the toilet into the holding tank, the pump's outlet is directed to the thru-hull.  And it does not interfere with normal use of the deck pumpout.

I also drilled a 1" hole thru the liner wall to allow access to the slotted shaft on the end of the motor (protected by a removable dust cap) for backing the shaft in case of a jam.  A white plastic plug from Lowes finished off the hole neatly.
Title: Re: Type I MSD
Post by: MangoCats on February 09, 2019, 01:53:31 PM
I have a 303 with a smallish vinyl bag holding tank under the starboard settee...  I don't know if the "soft tanks" would get you any more flexibility with respect to overall holding capacity, but they do seem like a relatively easy install (easy for me to say, my boat came with them pre-installed, and a gripe from the previous owner about one he had to replace because it was leaking...)