Where do macerator pump manufacturers (like FloJet) post the head capability of their pumps?Looked at several websites, downloaded some specific pump "manuals" but nowhere can I find how high the pumps will pump.Haven't measured it but I estimate the ground to the top of a holding tank in the pickup bed is going to be about five feet. I assume almost any pump would be capable but the higher (and/or farther) you pump the greater the strain on the pump and its motor.Also, does anyone have any specific pump recommendations?

It doesn't matter how far you're pumping, just the vertical rise. With the right size and type of line, one that doesn't increase friction losses, you could pump for miles with the smallest of pumps.

I've never seen a head rating for my Flojet Waste Macerator, only the caution to not pump greater than 25' through a 5/8" hose, 50' through a 3/4" hose over relatively flat terrain, which is what I do when servicing my tanks with the trailer parked here at the house. Since I carry my FJ in the trailer I always have the option when camping of off loading grey and / or macerated black water into containers sitting in the back of my truck and for that I just use a 25' 1/2" diameter hose, no issues at all. I've never tried it but I see no reason my Flojet couldn't just as easily pump through 50' of hose to containers sitting in the truck. Pics are in my gallery.

korbe wrote:It doesn't matter how far you're pumping, just the vertical rise. With the right size and type of line, one that doesn't increase friction losses, you could pump for miles with the smallest of pumps.Clearly the Flojet Waste Macerator owner's manual doesn't agree ...RECOMMENDED HOSE TABLEAPPLICATIONHose SizeMaximum Hose Length5/8” (16 mm)25 feet (7.5m) max3/4” (19 mm)50 feet (15m) maxRecommended lengths are based on horizontaldischarge. Longer discharge runs create higherresistance and may result in the pump motor overheating.

SoundGuy wrote:korbe wrote:It doesn't matter how far you're pumping, just the vertical rise. With the right size and type of line, one that doesn't increase friction losses, you could pump for miles with the smallest of pumps.Clearly the Flojet Waste Macerator owner's manual doesn't agree ...RECOMMENDED HOSE TABLEAPPLICATIONHose SizeMaximum Hose Length5/8” (16 mm)25 feet (7.5m) max3/4” (19 mm)50 feet (15m) maxRecommended lengths are based on horizontaldischarge. Longer discharge runs create higherresistance and may result in the pump motor overheating.Yes, for those size lines - which create friction losses.

korbe wrote:Yes, for those size lines - which create friction losses.And "those size lines" are what are recommended for use with the Flojet, none other. :R

? Macerator Pump Head Capability | Good Sam Community

wa8yxm
Explorer III
Dec 01, 2016
Re "Garden hose fitting" in fact Flo-Jet sells an adapter to use a 1" hose instead of 3/4 and what's more... Garden hoses come in several sizes 3/4 inch, 5/8, 1/2 and 3/8" are also common sizes.. Mine are 3/4.

I posted a link to a PDF, A Flow Jet publication it contains the specific info the O/P was searching for.. The Head Chart. I won't embarass him by telling how I found it or how long it took (What can I say Research is a hobby used to be a profession but trust me, you don't want to be the subject of my professional research (very evil grin) as those folks tend to have the same feature in their mail address now days ("Care of the warden"). Today I do research to help mostly RVers, myself included.

But the link to the info he wanted is in my prior post.. let me see if I can quote from the PDF (not all allow) The chart did not copy properly

But wait there is another way to copy (Manually)
(Will only copy US portion)

Discharge head
Feet GPM AMps
Zero 12.5 14
5 - - 11.5 14.5
10 - -10.5 15.0
15 - - 9.0 16.0
20 - - 7.5 16.5

NOTE My estimate on Zero (free flow) is 6GPM on my portable unit
but that is an estimate may be wrong.

But that is the info and my last post included the link to the flyer

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