Does any one else do this??.

[Beehpee]

I knew they had different products for different jobs but I didn’t realise just how many, thanks for providing the link OC.

 

[Beachball]

I would have agree thanks for the link OC i did know they had so much in the product range very interesting information .

 

[Stevel]

You can get the proper kit to blow the water system though. But that's overpriced in my opinion. I did make a mock up once with a bellows pump but all I do now, and it works. is:

• Drain down as much as possible.
• Close all taps.
• Remove shower head. Put shower control open and to mid position
• Open nearest tap to the shower, midway between hot and cold.
• Blow through the shower hose until you get free air from that tap.
• Repeat with all taps ending with the drain tap.

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If you have mains electricity available I use my aqua vac cleaner and suck the stuff out instead of blowing through

 

[Buckman]

I don't think I would be too keen on "sucking" out any water with a machine as the pipes can only withstand so much pressure?

 

[Raywood]

We have always managed by blowing down the taps although you do need to be a bit of a contortionist at the sink.

 

[Beachball]

i don"t think i have enough puff for blowing down a shower hose or shower head to get water out . i let a caravan engineer do it for me .

 

[Parksy]

I don't think I would be too keen on "sucking" out any water with a machine as the pipes can only withstand so much pressure?

Practical Caravan did an article on the Floe and Drain Down Kit which states that the pressure should be no more than 15 p.s.i.

 

[otherclive]

I don't think I would be too keen on "sucking" out any water with a machine as the pipes can only withstand so much pressure?

No risk of under pressuring hoses by Sucking as you can’t get more than a zero vacuum at minus ambient atmospheric. So 15psi approx. But if pipes are designed for pressure they could collapse inwards. Very unlikely though methinks 😂

 

[Buckman]

Practical Caravan did an article on the Floe and Drain Down Kit which states that the pressure should be no more than 15 p.s.i.

Floe and drain blows air out while the other device sucks it out. Is there a possibility that if it sucks too hard it may collapse a pipe as you cannot regulate the vacuum??

 

[ProfJohnL]

Floe and drain blows air out while the other device sucks it out. Is there a possibility that if it sucks too hard it may collapse a pipe as you cannot regulate the vacuum??

I seriously doubt it would collapse the hoses, but it could conceivably affect a water heater tank.

But some "O"ring seals are designed to be pressure activated, and exposing them to negative pressures might compromise their future action, so sucking is not a good idea.

 

[Buckman]

I seriously doubt it would collapse the hoses, but it could conceivably affect a water heater tank.

But some "O"ring seals are designed to be pressure activated, and exposing them to negative pressures might compromise their future action, so sucking is not a good idea.

I am not sure but maybe it could affect a one way valve?

 

[ProfJohnL]

I am not sure but maybe it could affect a one way valve?

It would depend on the design and location of the valve.

 

[Jcloughie]

Sucking the pipes out should only cause a slight vacuum as to work the taps would have to be opened to vent the system. If they were not, I don’t think that a domestic machine could achieve anywhere near a sufficient vacuum to collapse the pipes. But ‘O’ ring seals might but more problematic as the Prof says.

If I had power on the storage site I would do it. Except my carpet cleaner is kept in the loft, not too handy.

John

 

[Robert_374373903]

I thought I was odd man out regarding vacuum out the pipes as we have done it for years. What I never thought of was possible collapsing pipes and as mentioned O rings.