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curious about water flow

MainerBob
Explorer
Explorer
Since our black water gauge doesn't work, after I dump I refill with fresh water but have no way to measure how much I put in. The external fill is direct to the flusher from the campground hose bib. I use a 25' 3/4" hose and let it run about 3 minutes with the dump valve closed. Anyone have any idea how much water that might be? I don't have a bucket. Also have one of those Oxygenic shower heads and always wondered how much that uses. The hose hookup has a pressure reducer on it, of course, just not the flusher.
2007 Keystone Everest 293P, 32'
2006 Silvarado 2500HD Duramax, SRW, CC, Short Bed, 4x4
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Chloe, Standard Poodle
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11 REPLIES 11

Cummins12V98
Explorer III
Explorer III
dedmiston wrote:
MainerBob wrote:
I don't have a bucket.


HAAA too funny!
2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"

"HeavyWeight" B&W RVK3600

2016 MobileSuites 39TKSB3 highly "Elited" In the stable

2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD

dedmiston
Moderator
Moderator
MainerBob wrote:
I don't have a bucket.

2014 RAM 3500 Diesel 4x4 Dually long bed. B&W RVK3600 hitch • 2015 Crossroads Elevation Homestead Toy Hauler ("The Taj Mahauler") • <\br >Toys:

  • 18 Can Am Maverick x3
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Cummins12V98
Explorer III
Explorer III
^^^^^ good idea but the bucket and stop watch method is free.
2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"

"HeavyWeight" B&W RVK3600

2016 MobileSuites 39TKSB3 highly "Elited" In the stable

2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD

avvidclif1
Explorer
Explorer
Or buy one of these:

https://www.amazon.com/gp/product/B0058EOC5M/ref=oh_aui_detailpage_o03_s00?ie=UTF8&psc=1

I have 2, just in case.... You will be surprised how slowly the rinser fills the black tank.
Clif & Millie
2009 Ford F350 SRW CC Lariat 6.4 Diesel
2015 Heartland Cyclone HD CY3418 Toy Hauler

Cummins12V98
Explorer III
Explorer III
To determine how much water you are adding to your black tank do this. Let all the fluid drain from the tank. Place a 5 gallon bucket under the black tank outlet. Turn on the tank flush and set your timer for one minute. Now how much water is in the bucket? That is your GPM formula.

Yes water pressure may play a role in this but it will get you a good enough idea what you are actually adding.
2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"

"HeavyWeight" B&W RVK3600

2016 MobileSuites 39TKSB3 highly "Elited" In the stable

2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD

Cummins12V98
Explorer III
Explorer III
BB_TX wrote:
You refill the black tank with fresh water after dumping?
:h


Don't you?

I add at 3-5 gallons after I close my black tank valve.
2015 RAM LongHorn 3500 Dually CrewCab 4X4 CUMMINS/AISIN RearAir 385HP/865TQ 4:10's
37,800# GCVWR "Towing Beast"

"HeavyWeight" B&W RVK3600

2016 MobileSuites 39TKSB3 highly "Elited" In the stable

2007.5 Mobile Suites 36 SB3 29,000# Combined SOLD

Sam_Spade
Explorer
Explorer
BB_TX wrote:
You refill the black tank with fresh water after dumping?
:h


Nothing wrong with that I guess IF your life style fits nicely with your dump schedule BUT.....it certainly is not necessary. A couple of gallons should be plenty. With a smaller RV and smaller tank, a couple of flushes should do nicely.

Wait a sec. The OP seems to think that he is putting water directly into the black tank......and that might not be what is happening at all.
'07 Damon Outlaw 3611
CanAm Spyder in the "trunk"

Oasisbob
Explorer
Explorer
I run the flush kit sprinkler until the sound of the sprinkler inside gets quiet. This means it is under water and about half way full. Then I dump as I flush. Only once per trip. No chemicals needed Works for me
Oasis Bob
Wonderful wife 3 of 4 kids at home. 1 proudly serving in USAF
2018 Ford Explorer
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BB_TX
Nomad
Nomad
You refill the black tank with fresh water after dumping?
:h

agesilaus
Explorer II
Explorer II
Put the end of the hose in a 5 gal bucket and determine the time to fill it. Going into the tank will reduce the flow a little but that will give you a ballpark number
Arctic Fox 25Y Travel Trailer
2018 RAM 2500 6.7L 4WD shortbed
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corvettekent
Explorer
Explorer
It could be any where from 2 - 5 gallons per minutes.
2022 Silverado 3500 High Country CC/LB, SRW, L5P. B&W Companion Hitch with pucks. Hadley air horns.

2004 32' Carriage 5th wheel. 860 watts of solar MPPT, two SOK 206 ah LiFePO4 batteries. Samlex 2,000 watt Pure Sine Wave Inverter.