Good Sam Club Open Roads Forum: Commercial macerator or homemade from garbage disposer
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 > Commercial macerator or homemade from garbage disposer

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mikestock

Vestavia Hills, AL, USA

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Posted: 01/01/20 06:34pm Link  |  Quote  |  Print  |  Notify Moderator

I am looking to get a macerator and looking for recommendations.

One reason I am looking at a homemade is that it, to me, would be handier to have a 120 vac model than to have one wired to my batteries, located on the other side of my coach. I also expect to get a little more power from a 1/3 hp ac motor than from the 12 vdc motor.

The actual total cost of the homemade would be a little cheaper, but not significantly. Storage space required would not be a factor for me.

I am leaning toward the homemade model, at this point. It is claimed that it would pump waste 100 feet with about a 7-foot lift in elevation through a 3/4" hose. That is much more than I ever expect to need.

Primarily, the reason for the macerator is to allow me park my motorhome backward at one of my favorite spots, with the windshield facing a river. I need to pump about 35 feet to accomplish this.

garyemunson

Reno, Nevada

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Posted: 01/01/20 07:51pm Link  |  Quote  |  Print  |  Notify Moderator

For those that use macerators, is there ever an issue of the black tank not enptying well? I always thought it was important to have plenty of water in the tank so the velocity of it going out the drain would carry the solids with it. Even with the pump, it doesn't seem to me that the velocity of the exiting waste would be anywhere near that going out an open 3" valve and solids would be left behind.

cooldavidt

Vancouver

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Posted: 01/01/20 08:14pm Link  |  Quote  |  Print  |  Notify Moderator

A friend has a macerator on an Airstream. It is at ground level and the inlet is large diameter. I think their Airstreams has shower and bathroom sink plumbed through the black tank to provide plenty a liquids. Not sure if that is a common practice.

deltabravo

Spokane, WA

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Posted: 01/01/20 09:07pm Link  |  Quote  |  Print  |  Notify Moderator

A macerator is typically a poop grinder and pump all in one unit. Garbage disposal is a grinder and that is all.


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Old-Biscuit

Verde Valley

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Posted: 01/01/20 09:31pm Link  |  Quote  |  Print  |  Notify Moderator

Bought a Flojet Portable Macerator/pump back in 2008
Use it to pump waste tanks when parked at sisters/friends places
Sisters is a 75' run with a 2' incline to clean out

Pumps groundup waste just fine.........and will do so when 120VAC is not available


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valhalla360

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Posted: 01/02/20 12:10am Link  |  Quote  |  Print  |  Notify Moderator

Your average garbage disposal operates via gravity...simply grinding the solids that pass thru via gravity.

Unless you are thinking of something different, I don't think it will work.

PS: Running a 12v circuit to the other side of the rig, isn't too hard, so why mess with DIY when you can get a unit that is designed to do the job.


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NRALIFR

Truck Camping Out West

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Posted: 01/02/20 04:27am Link  |  Quote  |  Print  |  Notify Moderator

This guy built a garbage disposal macerator a few years back, and says it works fine. If you read through the comments, he and at least one other guy claim that they work great, and are pumping over 100’ distance and at least 4’ rise to their septic tanks.

DIY RV Macerator Pump

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DC

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Posted: 01/02/20 04:49am Link  |  Quote  |  Print  |  Notify Moderator

NRALIFR wrote:

This guy built a garbage disposal macerator a few years back, and says it works fine. If you read through the comments, he and at least one other guy claim that they work great, and are pumping over 100’ distance and at least 4’ rise to their septic tanks.

DIY RV Macerator Pump

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As others have said a disposer is not a pump, and I have yet to see one that is or has a pump.. It could be 300' but the only way it will drain in that scenario is if the outlet level of the disposer is higher than the drain end of the hose, and no part of the hose is higher than the outlet of the the hose. Even then its going to drain slowly. They may claim theyre defying gravity, but the net is full of people making all sorts of claims.

NRALIFR

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Posted: 01/02/20 05:01am Link  |  Quote  |  Print  |  Notify Moderator

Got it. It’ll never work.

Centrifugal force = bunk.

If you’d ever played with one on a bench, you’d know that they don’t suck worth a dam, but as long as the flow of liquid into the top is continuous, they sure as heck will pump.

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rv2go

Fulltime 15 yrs (Knoxville, TN).or someplace else

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Posted: 01/02/20 05:47am Link  |  Quote  |  Print  |  Notify Moderator

I have been using a homemade garbage disposal setup for over 15 years while parked for months at my daughters house. I pump 75 feet thru a 3/4" hose. I am hooked up to city water so it's no problem to rinse the Black tank.
Also, what I like about my setup is that the gray water will drain as used.


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