To empty onboard water tank in a Bailey Cordoba?

NutsyH

Many thanks for the confirmation.

I'm happy regarding switching from external to internal pump.  I just couldn't find anything how to fill  and (more importantly) empty the internal water tank and where the valves were. - still there's a lot to read.

The van was only delivered to us by the person we bought it off last Saturday so we haven't actually used it yet.

Is it possible to leave the valve switched to the onboard tank, so it can be topped up easily if needed, and can it be topped up with a watering can as well as using the waterhog?  With a watering can as that's what we used to do with out Bessacarr Motorhome.

Haven't even had time to look at the water inlet yet, as been too busy removing carpets, bedding and covers and lifting seats and beds to air during the winter!

I'm happy now that there is no water in the van anyway which was my main concern.

 I reckon a 4" diameter hole in the front panel of the seat would allow a hand to reach in to move the valves.  Unfortunately I can't do that on my caravan as where the hole would need to be is already filled by a double 13 amper socket.

Thanks for the suggestion Navigateur.

I haven't actually located the valve to switch from via water hog to taps, and via water hog to inboard tank yet.

I believe though, on viewing the video it will be near the Whale pressure accumulator (?) which is at the back of the bed box directly behind the Alde heater which is right against the front of the bed box.

I'll check it next time I visit the storage place, and if it's where I think it is, whether it would be possible to reach diagonally across to the value from an opening in the bed box.

Actually though I'm now thinking the drop down flap on the left of the bed box to get to the onboard water tank may mean that the valve I need to get to may also be reachable without lifting anything!

Many thanks to all again.  Replies have been really helpful.

We have a 2010 Bailey Pegasus with the same arrangement. I would suspect you would have to close the yellow drain down valve and turn on the taps to drain out the water from the onboard tank into the kitchen sink. You can then drain down the whole system by opening up the yellow switch again.

 Unless Bailey has moved to microswitch operated taps, all one needs to do is open the yellow valve and the pump will start and whatever source is set empty it out without a tap involved. Just remember to close the yellow valve when starting to use the system again!

Nav, is the internal pump built to be run for an extended length of time, sufficient  to ensure that any excess water in the system that has not drained off is expelled, without any water running through it?

The pump is between the Aquaroll/tank and the yellow dump valve/taps.  It will empty the tank, but once tank is empty not shift the water in the pipes leading up to the taps.  It will, however, build up a pressure of air if the taps are closed. It gets switched off by this pressure build up. If the pump in my caravan is the original it is 15 years old, and understandably there is a slow leak back through the pump seals. Hence it starts occasionally, runs for a few seconds, and goes back off.  No problem as we sleep at the other end of the caravan.

To do a decent job on clearing the pipes I got another pipe and plug that goes between Aquaroll and inlet socket, removed the filter, and fitted a Schrader valve.  I can use this adaptor to blow through the pipes with an air compressor, remembering that many joints are push fit and ( I think ) 5 p.s.i. is a safe maximum.  Certainly enough to blow lots of un-drained water through the taps!

Section 36 in your handbook appears to explain the system and how to operate it.

We have a Swift, the system is similar but different, our valves are accessible just behind the bed box drop flap.

I would think you need to set the valve for the mode you wish to use, i.e........fill tank........use from tank.....use from outside tank, and that the only way to fill the tank will be by pumping in water from the external tank, as there is only one water inlet.

You do however have 2 pumps, so you need to select the correct pump as well.

(our system has one pump but 2 separate valves)

Um.  Section 36 in the original owners manual we received with the van is 'Side Dinnette Top Bunk Assembly' !!  We don't have that anyway on our version of Bailey Unicorn Series 3 Cordoba - which is twin single beds.

I'll keep looking.  So far all I've read is about the standard water system via the Waterhog, but I'll look again to see if there is anything specific regarding the onboard tank.

Shame if we can only fill the onboard tank via the waterhog as I've read the onboard tank is useful to use during the winter.

https://www.baileyofbristol.co.uk/wp-content/uploads/2020/05/2015-Unicorn-III-Pegasus-IV-Pursuit-I-Owners-Manual.pdf

Page 36 I should have said. .......in the above manual.

Handbooks vary according to year, and often cover several different models.

You need to find the section on "twin axle water system"

There does need to be some way of bringing the water to the van to start with, hence filling via Waterhog/Aquaroll.