Draining fresh water

[Lanerboy]

I have the normal red and blue fresh water drain taps on my carthago and I tried to drain the fresh water today left it open to drop to 25% but not a lot happened it drained a bit but not much.

I opened a tap to let air in or our but this made no difference, if I turn the pump on it comes out the drain fine so am I missing something here should I have the pump on to drain fresh clean water off or should gravity do it for me

 

[pappajohn]

The boiler should drain under gravity but the cold may depend where the tap is in the system.
It sounds like yours is AFTER the pump rather than between pump and tank.
The pump is effectively a stop tap when it's not running..
Turning the pump on will push fresh water through the boiler and out of the boiler drain and out of the blue drain I'f its after the pump.
If the blue tap was between pump and tank the weight of water in the tank would force it out of the drain.
The bit of water that did come out was probably from the pipes.

 

[CazPaul]

Seems a strange design having to have the pump on to drain fresh water, none of the game we have had were designed like that.
just pull the lever and it all drains.

 

[Cavs]

Our drain taps for fresh and waste are identical, and mounted alongside each other under the floor just inside the habitation door. The fresh drains quickly without the pump operating and without opening taps.

If you’re trying to drain the system rather than just emptying the tank, it’s also necessary to open the three little valves to drain the boiler and pipes, and open the taps. These are rocker levers, individually labelled and on ours mounted alongside the main drain taps.



BTW, neither drains completely, due to the drain pipes being at the same level as the tank bottoms, which is not ideal, and it’s made worse by having two waste tanks joined by a similar pipe.

 

[Lanerboy]

cavs mine sounds the same as yours I was trying to drain the fresh water from 80% down to 25% but it got as far as 70% and no more would come out unless I turned the pump on. I feel it odd to need the pump running as whats the point in that surely gravity should do the work.

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[138go]

Ours does the same. If the frost stat trips it just empties the boiler if the pump is off. With the pump on the water drains completely. When you think about it it's the logical solution for a fully winterised MH. Who wants to wake up in the morning without any water in the tank because the frost stat tripped. Our water tank is below the level of the pump, boiler and frost stat. I just leave the frost stat open and the pump on with one of the taps open to let some air in when it starts getting near the end.

I also have two drain valves on the bottom of the tank but they are not the easiest to get at and if you don't get them just right when you screw them back in they leak. I would have thought you would have something similar. One of ours is labeled 20% so releasing that one leaves about 25 ltrs in the tank

You could always have the MH winterised at Marquis that would save you the trouble but you have to pay for them to open the valve

 

[Robert Clark]

On our Carthago there was a small round tap on the top of the water tank
From memory you turn it 3/4 turn to empty the tank but retain 20%

Or open a full turn to fully empty

 

[Cavs]

Interesting! I’ve never seen what @QFour or @Robert Clark describe - I shall investigate once we get home.

 

[Solwaybuggier]

On our Carthago there was a small round tap on the top of the water tank
From memory you turn it 3/4 turn to empty the tank but retain 20%

Or open a full turn to fully empty

Same on our C-tourer.

 

[Lanerboy]

On our Carthago there was a small round tap on the top of the water tank
From memory you turn it 3/4 turn to empty the tank but retain 20%

Or open a full turn to fully empty

Just found this tap was not shown that on hand over that has worked a treat
Cheers

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