Type I MSD

[peghall]

It is installed after the vacuum generator (or vacuum pump). Raritan can provide you with the additional instructions for installing either the ElectroScan OR the PuraSan in a Vacuflush system. It's designed to flush directly overboard, btw (all Type Is are)...a y-valve provides a choice of doing that or going into the tank where holding is required.

[Viking Sailor]

Peggie,

When in a NDZ is there any advantage to sending the output of the MSD-I unit to the holding tank? That is installing the Y-value after the MSD-I unit instead of before it.

Thanks,

Paul

[Pblais]

When in a NDZ is there any advantage to sending the output of the MSD-I unit to the holding tank?

It would be required in a NDZ else you would not really want to be inside one. They fine because you could discharge and not if you actually did.

[peghall]

I think you misunderstood the question, Paul. It doesn't matter whether waste is treated before it goes into the tank or not, 'cuz once it does go into the tank it's no longer considered "treated" waste. So the only thing that matters when it comes to y-valves is whether they're properly "secured" while in ND waters...it doesn't matter whether it's installed before or after the treatment device. Put where it's most accessible.

[Viking Sailor]

Peggie and Paul,

Sorry for the poor phrasing of my question.

What I would like to know is there any advantage in putting the processed output of a MSD-I unit into the holding tank. Since it is possible to route either the input of a MSD-I to the holding tank or to route the output of the MSD-I to the holding tank via a Y-value. Is processed waste better than raw waste in the holding tank?

Paul

[Viking Sailor]

Peggie,

Thanks for the info.

Paul

[peghall]

Originally Posted by Viking Sailor

Is processed waste better than raw waste in the holding tank?

No...for a couple of reasons: Once it goes into the tank, it's no longer considered treated...so treating it first would not make it any more legal to dump the tank inside the "3 mile limit" than it is to dump a tankful of waste that hadn't been treated.

Reason: although treatment devices reduce bacteria count--federal law requires that it be reduced to a maximum of 1000/100 ml...the LS/ES and PuraSan actually reduce it to <10/100--but only ONE of the li'l buggers has to survive to multiply back into zillions again, especially in hot weather...so treating first doesn't help when it comes to odor either.

And btw...the only NDZ on the whole west coast north of Santa Barbara is a small harbor (whose name escapes me, but it's where Sausalito is) off SF Bay...the discharge of treated waste is legal in the Bay.

[GordMay]

Originally Posted by peghall

... And btw...the only NDZ on the whole west coast north of Santa Barbara is a small harbor (whose name escapes me, but it's where Sausalito is) off SF Bay...the discharge of treated waste is legal in the Bay.

Richardson Bay.

No Discharge Zones in Region 9 - California
➥ No Discharge Zones | Region 9: Water Programs | US EPA

There are no Discharge Zones established in EPA Region 10 - Alaska, Idaho, Oregon, and Washington State.
➥ http://water.epa.gov/polwaste/vwd/vs..._pending10.cfm

[peghall]

Thank you, Gord...Richardson Bay is the small harbor off SF Bay whose name I couldn't remember. And, as shown on the map of Region 9, the Channel Islands are all south of Santa Barbara. None in between, none north of Richardson Bay.

[jbwolfe]

Paul - Have you ever noticed any signs of corrosion around the dispenser due to slight escaping of the gasses from the tablets ?

[Pblais]

I'm not aware that the hypo Chloride can become gaseous.

Depending on what you use for hose clamps on the fittings they will leak and the oxidation caused by the hypo chloride is fairly potent. Mini stainless hose clamps suck. The plastic T's and valves just can't handle metal clamps nor can the check valves. I find double tie wraps are better. They need to be small or they won't handle the small radius. Heat shrink might work better but I find I need to rear all the hoses and container apart annually to clean out the hypo chloride that tends to solidify and gum up the check valves. Keeping those little guys working is important and they cost $24 each. I've not found a suitable generic substitute for the Raritan check valves. The make or break pressures are really tiny. If they gum up they will leak and a complete disassembly of them is a tad tricky getting them back together..

[peghall]

The "tablet dispenser"--which doesn't actually dispense tablets, but contains a single solid block ("tablet") of hypochlorous acid)--is all plastic...the tablet is in a sealed cartridge...and so there shouldn't be any "outgassing" from the "tablet." The complete manual for it is here: http://www.raritaneng.com/pdf_files/.../L405v0911.pdf

[jbwolfe]

The reason for my question about the possible off-gassing from the dispenser is that the most convenient location for the dispenser is in a cabinet that is shared with a lot of electrical connections, so I obviously wouldn't want to introduce anything to the area that would oxidize the connections.

Jim
Rickshaw
Gloucester Point, VA

[peghall]

I'm 99% certain there isn't any outgassing from it...but to be on the safe side, I suggest you give Raritan a call: 800-352-5630 x 6

[Morrissey]

Does anyone have any experiences with Groco's Thermopure 2 system?

I have only a 26 gal holding tank and the Groco retrofit system would seem to be a good option. Of course there is the price issue....

Thanks - Brian