Originally Posted by davegreene99
Can anyone give me the USCG regulation or EPA regulation which allows Bayliner (Brunswick) to have either a key switch for a macerator which dumps overboard or 2 manual switches which do the same?
Has to meet CFR 33; part 159, see below. If it is approved system there will be a USCG approval tag on the unit. I have a Microphor type 2 and I had to add a small holding tank to contain the affluent when I'm in a no dump zone, like when I go threw the locks into Lake Washington from Puget Sound. The overboard pump is controlled by a locking on / off switch at the helm, no Y valve.
From USCG webpage:
There are three different types of MSDs that can be certified by the U.S. Coast Guard to meet the requirements in 33 CFR Part 159, each having its own design, certification, and discharge criteria. For more information see 33 CFR 159.53.
Type I is a flow through discharge device that produces effluent having a fecal coliform bacteria count not greater than 1,000 per 100 milliliters and no visible floating solids. This type of device is typically a physical/chemical based system that relies on maceration and chlorination. Type I MSDs are issued a Certificate of Approval.
Type II is a flow through discharge device that produces effluent having a fecal coliform bacteria count not greater than 200 per 100 milliliters and suspended solids not greater than 150 milligrams per liter. This type of device is typically a biological or aerobic digestion based system.
Type III is a device that prevents the overboard discharge of treated or untreated sewage or any waste derived from sewage. This type of device is typically a holding tank and may include other types of technology including incineration, recirculation, and composting.