Adding a Macerator

wayne0

Active Member
May 4, 2014
568
Newburyport, Ma.
Boat Info
2000 340 Sundancer
Engines
Twin 7.4 ltr.V-drives
Thinking about adding a macerator to my 2000 340DA. There is a place on the panel for the switch, but is the wiring there? Aside from adding the pump and a thru hull, what else is involved? is there a fitting on the tank, or do I have to tee off the pump out line?
TIA
 
I think rather then messing around with trying to cut A hole in the tank and install a dip tube, easier to just to install a Y valve on the pump out line. Tail of the Y points to tank, one branch goes up to pump out fitting, other line goes to pump and through hull. Basically you would just existing pump out line and insert the Y valve, and then attach the new stuff to the remains Y branch.

On wiring, there should be a plug already in place near or on the tank. You’ll need to consult your wiring diagram that will give you color codes of the wires. The OEM wiring included a lock out switch on the sea cock that prevented the pump from energizing if the seacock was closed. You can really do some nasty work if you run the macerator with the sea cock closed. If you don’t opt for the safety switch you may have to modify the wiring by adding a permanent ground.
 
Y valve makes sense for the input, but for the output, wouldn't you have to add another seacock?
 
I would say yes.
Need to add a thru hull. Just finished installing one on a Larson. Cut outlet line and install y valve. Rehook line to outside waste outlet , run a new line from y valve to macerator and on to a new thru hull. Wired on a simple off-on switch. Works like a darn.
 
Need to add a thru hull. Just finished installing one on a Larson. Cut outlet line and install y valve. Rehook line to outside waste outlet , run a new line from y valve to macerator and on to a new thru hull. Wired on a simple off-on switch. Works like a darn.

I’m not sure about regulations in Canada, here in US the pump line thru hull needs some kind of lock out prevention feature. Also word to the wise, don’t run the pump unless you are sure the through hull sea cock is open.
 
I’m not sure about regulations in Canada, here in US the pump line thru hull needs some kind of lock out prevention feature. Also word to the wise, don’t run the pump unless you are sure the through hull sea cock is open.
Your right Henry. Have to lock the Y valve in the thru hull closed position.
 

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