Home

   Log in or Register



Insurance Quotes
forums Campsite Search Comp Directory tips virtual brochure Profile
Tent and Awning Reviews Competitions Caravans and Motorhomes For Sale Shopping Diary Advent Calendar

Advertisement

Message Forums

Welcome Guest Register Login Search The Forum Posts Since Last Visit
 Reception - All Forums
  Caravans and Caravanning
Share   Post on X / Twitter  Share on Facebook  Email  Printer Friendly Version Print
Subject Topic: Emptying flush tank
Page:  1  2 Post Reply Post New Topic
18/2/2024 at 7:28pm
 Location: Nottingham
 Outfit:  Swift Freestyle S2
View robin52's Profile View Profile   Reply to robin52 Reply   Quote robin52 Quote  
Joined: 10/9/2005

Diamond Member
Diamond Member

Forum Posts:   1632

Site Reviews Total: 4
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

In my latest caravan, there is a sticker on the flush tank , saying to drain the tank before travelling. In all the years I’ve caravanned I have never done this. Will this be something new, should I do this?

-------------
Regards Robin


via mobile 18/2/2024 at 7:58pm
 Location: Ayrshire
 Outfit: Auto-Sleeper MHs
View Fiona W's Profile View Profile   Reply to Fiona W Reply   Quote Fiona W Quote  
Joined: 10/4/2007

Diamond Member
Diamond Member

Forum Posts:   5144
Tent Reviews:   1

Site Reviews Total: 234
Site Reviews 2024: 18 
Site Reviews 2023: 8  
Site Reviews 2022: 12 
Site Reviews 2021: 10 
Site Reviews 2020: 4  
Site Reviews 2019: 9  
Site Reviews 2018: 18 
Site Nights 2024: 37
Site Nights 2023: 25
Site Nights 2022: 32
Site Nights 2021: 25
Site Nights 2020: 20
Site Nights 2019: 28
Site Nights 2018: 30

We’ve never done that, but we’re in a MH rather than a caravan. Pretty wasteful of water & the additives if you’re moving on every day.

-------------
2024 = 20 sites / 41 nights. 2023 = 9/23. 2022 = 13/35. 2021 = 11/29. 2020 = 4/20. 2019 = 13/35. 2018 = 20/33. 2017 = 10/22. 2016 = 19/33. 2015 = 15 sites / 27 nights. Didn't count 1976 to 2014.


Discounted Insurance Quotes for UKCampsite.co.uk visitors! Up to 12.5% off!
UKCampsite.co.uk users are rewarded with up to 12.5% off Caravan Guard touring caravan insurance, folding camper and trailer tent insurance, and 5% off motorhome and campervan insurance. Static caravan insurance is also available. Get an online quote now

18/2/2024 at 8:35pm
 Location: Lichfield
 Outfit: Coachman Amara 450
View tango55's Profile View Profile   Reply to tango55 Reply   Quote tango55 Quote  
Joined: 15/5/2008

Diamond Member
Diamond Member

Forum Posts:   9587

Site Reviews Total: 23
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 3  
Site Reviews 2021: 1  
Site Reviews 2020: 0  
Site Reviews 2019: 4  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 11
Site Nights 2021: 3
Site Nights 2020: 0
Site Nights 2019: 24
Site Nights 2018: 0

The reason why they advise to drain the flush tank before travelling is because if the tank contains any amount of fluid in transit then you will get a bow wave from the remaining water inside which can make the caravan unstable in cross winds and going round bends etc. so removing the flush water before setting off eliminates the risk of snaking. However, at the other end of the spectrum, if you fill the tank up full then that also eliminates the possibility of the caravan becoming unstable as well because no bow wave can be created which is what I have to do each time before setting off to help to reduce the caravan noseweight to achieve the required noseweight specified by the vehicle manufacturer which is 80 kgs.
So the answer is to either have the flush tank empty or full but nothing in between that can create a bow wave in transit.
It's not so critical in a motorhome to empty the flush tank merely because there is more stability having four wheels instead of two so it's just a weight related factor that's all.



18/2/2024 at 11:11pm
 Location: London
 Outfit: Lunar Cosmos 524
View Monty15's Profile View Profile   Reply to Monty15 Reply   Quote Monty15 Quote  
Joined: 17/9/2015

Diamond Member
Diamond Member

Forum Posts:   2329

Site Reviews Total: 1
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 1  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 6
Site Nights 2018: 0

Mine (Thetford toilet) advises not to travel with a FULL flush tank, to avoid slopping contents overwhelming the tank and spilling out of tank into the interior (it's not totally sealed at the top)! A partial filled tank is OK.

I usually travel with no more than approx half full, it's NEVER been a problem (6 years, 8k plus miles!), and the toilet is always ready for use on journey for 'comfort' breaks and a day or so on site.

The weight of fluid in the full tank is pretty insignificant, it's only 8 litres (8Kg) filled to brim, compared with the weight of even a lightweight van like mine (1310kg), and as the tank is VERY narrow and mostly vertical, the effects of 'slopping' is going to be insignificant on the dynamics of a towed van, and mine is a rear bathroom!

Can't comment on Dometic toilets, as no experience, but difficult to see much difference, as principles exactly the same!

I also always travel with the flush tank 'primed' ready for use with fluid and a litre or so of water. Tend to empty it before travel if it's more than around a third full though.


19/2/2024 at 12:26am
 Location: Lichfield
 Outfit: Coachman Amara 450
View tango55's Profile View Profile   Reply to tango55 Reply   Quote tango55 Quote  
Joined: 15/5/2008

Diamond Member
Diamond Member

Forum Posts:   9587

Site Reviews Total: 23
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 3  
Site Reviews 2021: 1  
Site Reviews 2020: 0  
Site Reviews 2019: 4  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 11
Site Nights 2021: 3
Site Nights 2020: 0
Site Nights 2019: 24
Site Nights 2018: 0

The question that the OP asked was why it said to drain the flush tank before travelling so I answered the question as required as to why the manufacturer would advise that. What people do in terms of tanks being full, partly full or empty is besides the point so we really need to stay focused on the question being asked.   


Advertisement



19/2/2024 at 7:10am
 Location: Nottingham
 Outfit:  Swift Freestyle S2
View robin52's Profile View Profile   Reply to robin52 Reply   Quote robin52 Quote  
Joined: 10/9/2005

Diamond Member
Diamond Member

Forum Posts:   1632

Site Reviews Total: 4
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

Thanks for replying folks

-------------
Regards Robin


19/2/2024 at 11:39am
 Location: Near Alton Towers
 Outfit: Bailey Burgundy S7 H
View Pickled Onion's Profile View Profile   Reply to Pickled Onion Reply   Quote Pickled Onion Quote  
Joined: 23/2/2006

Diamond Member
Diamond Member

Forum Posts:   3042

Site Reviews Total: 11
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 3  
Site Reviews 2021: 1  
Site Reviews 2020: 2  
Site Reviews 2019: 1  
Site Reviews 2018: 1  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 11
Site Nights 2021: 5
Site Nights 2020: 9
Site Nights 2019: 8
Site Nights 2018: 1

The average capacity of a toilet flush tank is 7-8 litres. I think the reason for not travelling with anything more than half full is to reduce the risk of the tamk mountings coming loose because of the weight plus inertia whilst moving. Unless there are additional battens fitted behind the wallboard there is limited strength in 3mm plywood.

I think from memory Bailey advise no more than half full.

Dave.

-------------
Give a man a fish and he will eat for a day,
Teach a man to fish and you can get rid of him for a whole weekend.


19/2/2024 at 12:45pm
 Location: Yorkshire
 Outfit: Car & Caravan
View Paul_B's Profile View Profile   Reply to Paul_B Reply   Quote Paul_B Quote  
Joined: 24/9/2004

Platinum Member
Platinum Member

Forum Posts:   825

Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

I drain mine into a bottle ready for next time, the bottle is kept in the front locker where it can't do any damage.

I also drain the water heater


via mobile 19/2/2024 at 1:26pm
 Location: 
 Outfit: 
View Dave and Cyn's Profile View Profile   Reply to Dave and Cyn Reply   Quote Dave and Cyn Quote  
Joined: 23/7/2018

Gold Member
Gold Member

Forum Posts:   225

Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

Always drain the flush tank and water heater. Then we only use plain water in the flush, no additives.
The payload is narrow enough without lugging water around as well.
We do carry a flask of hot water in the car for a brew en- route should we decide to take a break.


via mobile 21/2/2024 at 3:47pm
 Location: Stoke on Trent
 Outfit: Bailey Pegasus Modena 2016
View Paul and Nikki's Profile View Profile   Reply to Paul and Nikki Reply   Quote Paul and Nikki Quote  
Joined: 10/4/2016

Gold Member
Gold Member

Forum Posts:   298

Site Reviews Total: 0
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

Could be either because of weight or more likely due to the flush circuitry in the flush tank being damaged by splashing water, I'm sure I have read that the circuit board is exposed, which isn't a problem when the caravan is static.


Advertisement



via mobile 21/2/2024 at 5:54pm
 Location: None Entered
 Outfit: Coachman Festival
View Ancient Uncle's Profile View Profile   Reply to Ancient Uncle Reply   Quote Ancient Uncle Quote  
Joined: 22/5/2017

Gold Member
Gold Member

Forum Posts:   479

Site Reviews Total: 5
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 3  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 34
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

We just keep a small amount in the tank in case we need to stop en route and use it.


22/2/2024 at 10:08am
 Location: SHEFFIELD
 Outfit: Coachman laser RangeRover Sport4.4
View kevin-t's Profile View Profile   Reply to kevin-t Reply   Quote kevin-t Quote  
Joined: 07/9/2010

Gold Member
Gold Member

Forum Posts:   364

Site Reviews Total: 3
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 2  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 21
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0


A little off topic here..
However, a couple of years ago we didn't use our van for 18 months ( pandemic ). reason.
Anyways during winter had a pop up to storage site just to get out of house, thought I would check on the van. Freezing cold I might add.
Low and behold I had left some tinned food in a cupboard. Not a usual thing I do, but for some reason or another I had.
What did I find! two of the tins of tomatoes had popped and leaked. WOW. Yes the frost must have got into the tins expanded and popped the cans.
So what could the frost / ice do to 7/8 ptrs of water if left.?????
I used to leave water in toilet tank, since I have seen the tins this with my own eyes. I will never leave any liquids in van over winter now.
Just my two penneth.

Kevin


22/2/2024 at 6:00pm
 Location: Nottingham
 Outfit:  Swift Freestyle S2
View robin52's Profile View Profile   Reply to robin52 Reply   Quote robin52 Quote  
Joined: 10/9/2005

Diamond Member
Diamond Member

Forum Posts:   1632

Site Reviews Total: 4
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

I also never leave liquids in the caravan over winter but it would never have crossed my mind about liquids in a tin. Worth mentioning. Thank you Kevin.

-------------
Regards Robin


22/2/2024 at 6:05pm
 Location: Nottingham
 Outfit:  Swift Freestyle S2
View robin52's Profile View Profile   Reply to robin52 Reply   Quote robin52 Quote  
Joined: 10/9/2005

Diamond Member
Diamond Member

Forum Posts:   1632

Site Reviews Total: 4
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

Quote: Originally posted by Paul_B on 19/2/2024
I drain mine into a bottle ready for next time, the bottle is kept in the front locker where it can't do any damage.

I also drain the water heater



Good idea Paul

-------------
Regards Robin


23/2/2024 at 11:46am
 Location: Near Alton Towers
 Outfit: Bailey Burgundy S7 H
View Pickled Onion's Profile View Profile   Reply to Pickled Onion Reply   Quote Pickled Onion Quote  
Joined: 23/2/2006

Diamond Member
Diamond Member

Forum Posts:   3042

Site Reviews Total: 11
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 3  
Site Reviews 2021: 1  
Site Reviews 2020: 2  
Site Reviews 2019: 1  
Site Reviews 2018: 1  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 11
Site Nights 2021: 5
Site Nights 2020: 9
Site Nights 2019: 8
Site Nights 2018: 1

Even the slightest amount of water in the wrong place in winter, will freeze and do damage. This was what happened with the old Thetford CWE250 flush pumps until an extra drain hose mod was fitted. It also happened to shower/tap housings. Been there, got the T-shirt.

Dave.

-------------
Give a man a fish and he will eat for a day,
Teach a man to fish and you can get rid of him for a whole weekend.


28/2/2024 at 6:18pm
 Location: Nottingham
 Outfit:  Swift Freestyle S2
View robin52's Profile View Profile   Reply to robin52 Reply   Quote robin52 Quote  
Joined: 10/9/2005

Diamond Member
Diamond Member

Forum Posts:   1632

Site Reviews Total: 4
Site Reviews 2024: 0  
Site Reviews 2023: 0  
Site Reviews 2022: 0  
Site Reviews 2021: 0  
Site Reviews 2020: 0  
Site Reviews 2019: 0  
Site Reviews 2018: 0  
Site Nights 2024: 0
Site Nights 2023: 0
Site Nights 2022: 0
Site Nights 2021: 0
Site Nights 2020: 0
Site Nights 2019: 0
Site Nights 2018: 0

Just to be clear I’m not asking about winterising. I’m asking about travelling eg between sites.
Thanks again for your replies.

-------------
Regards Robin



In order to post a reply you will need to register, or if already registered please log in here

Prev       Next

Jump To Page:  1  2

Quick Links - All Forums - Caravans and Caravanning - Top of Page

Printer Friendly Version Printable version      Share   Post on X / Twitter  Share on Facebook  Email


Latest News, Discounts and Competitions  see all...














5093 Visitors online !

Free UKCampsite.co.uk Window Sticker  -  Recommend to Friend  -  Add a Missing Campsite

[Message Forums]  [Caravan Sites & Camping]  [Company Listings]  [Features / Advice]  [Virtual Brochure]  [Shop!]
[Reception]  [Competitions]  [Caravans & Motorhomes For Sale]  [Event Diary]  [Contact Us]  [Tent Reviews



Please note we are not responsible for the content of external sites & any reviews represent the author's personal view only. Please report any error here. You may view our privacy and cookie policy and terms and conditions here. All copyrights & other intellectual property rights in the design and content of this web site are reserved to the UKCampsite.co.uk © 1999 - 2024


Advertisement


Advertisement


UKCampsite.co.uk
2024 Advent Calendar


Advent Calendar

24 Daily Prizes PLUS a Christmas Day Star Prize worth £999

Request a Reminder