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02-16-2021, 11:09 AM
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#1
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Bus Nut
Join Date: Jul 2017
Location: Huntington Beach CA.
Posts: 939
Year: 1991
Coachwork: Bluebird
Chassis: T/C 2000 28 foot Handy Bus
Engine: Cummins 5.9 Mechanical
Rated Cap: 2
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what size drain hose for grey water only
Since we are using a composting head and will only be dumping grey water, is a 2" or 2 1/2" hose adequate? I realize that it will mean using an adaptor to connect but not having to wrestle full size hose is a plus and storage easier also. But, will it work?
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02-16-2021, 11:27 AM
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#2
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Bus Crazy
Join Date: Jun 2020
Location: Long Beach, CA
Posts: 1,075
Year: 1998
Coachwork: Blue Bird
Chassis: TC2000, 40' MPV
Engine: 5.9 Cummins/B300 trans
Rated Cap: U/K
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I can't see why it wouldn't work. If you have a strainer in your kitchen sink, it would primarily be just dirty, soapy water..
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02-16-2021, 12:49 PM
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#3
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Mini-Skoolie
Join Date: Aug 2019
Location: Central WI
Posts: 21
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Quote:
Originally Posted by Rivetboy
Since we are using a composting head and will only be dumping grey water, is a 2" or 2 1/2" hose adequate? I realize that it will mean using an adaptor to connect but not having to wrestle full size hose is a plus and storage easier also. But, will it work?
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Rigs that use a macerator for black water typically discharge into a 1” smooth bore hose or even “garden hose,” so this seems reasonable. However, I would make sure to look for an RV adapter first for your intended hose/connections, before you buy hose or start construction. Cheers, Kev
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02-16-2021, 02:04 PM
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#4
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Bus Crazy
Join Date: Apr 2020
Location: Northern California (Sacramento)
Posts: 1,424
Year: 1999
Coachwork: El Dorado Fiberglass
Chassis: Ford E450
Engine: V10 Gas
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My outlet on the two graywater tanks is 2" but I couldn't source an adapter/connecter and hose, so I've just put a 3" adapter on the ABS drain lines and have the standard 3" hose. I'd have loved to have the smaller hose so if you have a source, let me know!
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02-16-2021, 03:09 PM
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#6
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Mini-Skoolie
Join Date: Aug 2019
Location: Central WI
Posts: 21
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Amazon - Clean Dump (CDHV-20) 20' Length Discharge Hose with Drip Proof Valve.
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02-16-2021, 03:48 PM
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#7
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Bus Nut
Join Date: Jul 2017
Location: Huntington Beach CA.
Posts: 939
Year: 1991
Coachwork: Bluebird
Chassis: T/C 2000 28 foot Handy Bus
Engine: Cummins 5.9 Mechanical
Rated Cap: 2
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2 " hose
Found this so there is fittings also I am sure. Also was looking at pool vacuum hose.
https://www.ebay.com/itm/231924741640?chn=ps
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02-16-2021, 03:56 PM
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#8
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Bus Nut
Join Date: Jul 2017
Location: Huntington Beach CA.
Posts: 939
Year: 1991
Coachwork: Bluebird
Chassis: T/C 2000 28 foot Handy Bus
Engine: Cummins 5.9 Mechanical
Rated Cap: 2
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And here is your electric 2" drain valve. Rainbird 2" commercial electric valve Just search on ebay link was stupid
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02-16-2021, 03:57 PM
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#9
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Bus Nut
Join Date: Jul 2017
Location: Huntington Beach CA.
Posts: 939
Year: 1991
Coachwork: Bluebird
Chassis: T/C 2000 28 foot Handy Bus
Engine: Cummins 5.9 Mechanical
Rated Cap: 2
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Search for truck vacuum hose
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02-16-2021, 04:39 PM
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#10
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Bus Crazy
Join Date: Apr 2020
Location: Northern California (Sacramento)
Posts: 1,424
Year: 1999
Coachwork: El Dorado Fiberglass
Chassis: Ford E450
Engine: V10 Gas
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That is a smooth wall 1" hose-a bit too small to drain properly, even graywater, I think.
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02-16-2021, 04:42 PM
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#11
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Bus Crazy
Join Date: Apr 2020
Location: Northern California (Sacramento)
Posts: 1,424
Year: 1999
Coachwork: El Dorado Fiberglass
Chassis: Ford E450
Engine: V10 Gas
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I think you meant 'vacuum cleaner hose'? Those don't have watertight fittings.
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02-16-2021, 04:46 PM
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#12
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Bus Crazy
Join Date: Apr 2020
Location: Northern California (Sacramento)
Posts: 1,424
Year: 1999
Coachwork: El Dorado Fiberglass
Chassis: Ford E450
Engine: V10 Gas
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I rented an RV to get a feel for draining the tanks last year and speed was definitely something to keep in mind, especially in 105+ temps. I'm happy with my decision to upsize to 'standard RV waste hose' and the associated quick connect.
I haven't commissioned the tank yet, so I can't give you a sense of how well it works, but I'm happy it is a standard setup so if I lose the hose I'm not specialty-searching and waiting a week for a replacement.
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02-27-2021, 09:01 PM
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#13
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New Member
Join Date: Sep 2020
Posts: 4
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No grey water only needs 1 1/2" except drain on regular shower pan's they take 2" but can be reduced down to 1 1/2"
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02-27-2021, 11:08 PM
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#14
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Bus Crazy
Join Date: Nov 2014
Location: NM USA KD6WJG
Posts: 1,324
Year: 1991
Coachwork: Bluebird
Chassis: All American RE 40 FEET
Engine: Cummins 8.3
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I'm using 1 1/2" corigated hose for grey water. I use cam lock on the ends. Have 2 hoses that can connect to each other for long runs. Made a cam lock to 3 inch for rv parks.
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02-27-2021, 11:58 PM
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#15
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Bus Nut
Join Date: Aug 2019
Location: Auburn, WA
Posts: 784
Year: 2000
Coachwork: IC / Amtran
Chassis: 3000 / 33' Flat Nose
Engine: IC T444E / Allison MT643
Rated Cap: 72 Kids / 48 Adults
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I'm using only grey tank with a 4" male connection. My tank sits under the bus between the frame rails. My tank holds about 40 gallons, yet I have 80+ gallons of fresh water. More about this later.
I ran 4" all the way to the the side of the bus with a normal RV twist on sewage hose connection.
Just before that 4" RV twist connection, I put in a Y. One side had the 4" and the other a 2" opening. I adapted down the 2" to a standard water hose thread with a on-off valve (see attached pic)
Why?
When I want to dump fast at a dump site, I use the standard 4" port. This also assures any "small" items that may have made it to the tank exit with no issues.
The water hose connector allows me to use this trick.
__________________
Steve
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02-28-2021, 08:57 AM
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#16
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Bus Geek
Join Date: Sep 2018
Posts: 2,831
Year: 2007
Coachwork: Thomas Built
Chassis: Minotour
Engine: Chevy Express 3500 6.6l
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I don’t understand why you wouldn’t just use the stock 4” stuff. I guess maybe if you had a long run to the sewer it would make sense, but then just using the 4” cap with hose connector would solve that.
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02-28-2021, 09:22 AM
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#17
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New Member
Join Date: Sep 2020
Posts: 4
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I'm sorry I misunderstood the question completely. Yes of course you use the largest you can to dump faster. Forgive my mistake Jerry
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02-28-2021, 10:29 AM
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#18
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Bus Geek
Join Date: Apr 2012
Location: So Cal
Posts: 3,227
Year: 1935
Coachwork: Superior
Chassis: Chevy
Engine: 317 ci/tid / Isuzu
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Since I installed a macerator pump I use a 5/8" garden hose to drain both the black and grey tank. Never again will I use a stinky slinky.
Jack
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02-28-2021, 10:59 AM
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#19
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Bus Crazy
Join Date: May 2017
Location: Athens, TN
Posts: 1,574
Year: 1999
Coachwork: Amtran
Chassis: International RE
Engine: International T444e
Rated Cap: 76
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Quote:
Originally Posted by ol trunt
Since I installed a macerator pump I use a 5/8" garden hose to drain both the black and grey tank. Never again will I use a stinky slinky.
Jack
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What drives me nuts about using our macerator is just how long it takes to get the job done. Running 3" the whole way from tank to slinky to dump, it takes two minutes to empty 40gal black (NOT in winter), four minutes to empty 90gal fresh. With the macerator draining takes much longer.
I like the way you built it in, though. Only way to get the stinky uphill.
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02-28-2021, 11:53 AM
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#20
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Bus Nut
Join Date: Aug 2019
Location: Auburn, WA
Posts: 784
Year: 2000
Coachwork: IC / Amtran
Chassis: 3000 / 33' Flat Nose
Engine: IC T444E / Allison MT643
Rated Cap: 72 Kids / 48 Adults
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Quote:
Originally Posted by ol trunt
Since I installed a macerator pump I use a 5/8" garden hose to drain both the black and grey tank. Never again will I use a stinky slinky.
Jack
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Holy Crap (pun intended), that's a hell of a sewer setup! Great job!
__________________
Steve
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