Can any one help i have just returned from my hols and am very fustrated on the lack of pressure on my direct water feed to my van.is there any way of turning it up?or is it the valve on the end of the hose that connects to the van?my van is a com rallye540 2005
water pressure
- Thread starter darren_374307301
- Start date
Hello Darren,
I do not know how much you know or understand about the water systems in caravans, but an important fact is that the joints and other fittings inside the caravan are only designed to withstand a working pressure of about 1.5Bar.
This is not a problem when using a submersible pump, as the they only develop typically about 1.2Bar, but mains water pressure can easily rise to 6 bar, and if there is a lot of taps and valves on the pipe run the instantaneous pressure can rise above that when taps are shut off due to the momentum of the water in the pipe.
Clearly if a caravan is to be connected to the mains, it must have a pressure limiting valve or regulator to prevent excess pressure reaching the van fittings.
The problem is that the majority of such valves fitted to mains water hoses, do have a flow restricting effect. You are mot likely experiencing this.
Sadly, there is normally no adjustment on the regulator valve, but if the effect is severe it may be a faulty unit.
Some people compromise by fitting a float valve (like a toilet cistern type) to a water container, and connect it to the tap. The water container is automatically topped up, and then they use a normal pump to lift the water into the caravan.
This has two advantages over direct fitting, firstly it maintains a better flow of water into the caravan, and secondly if prevents the possibility of the caravan fittings bursting if the regulator valve fails on the hosepipe.
I do not know how much you know or understand about the water systems in caravans, but an important fact is that the joints and other fittings inside the caravan are only designed to withstand a working pressure of about 1.5Bar.
This is not a problem when using a submersible pump, as the they only develop typically about 1.2Bar, but mains water pressure can easily rise to 6 bar, and if there is a lot of taps and valves on the pipe run the instantaneous pressure can rise above that when taps are shut off due to the momentum of the water in the pipe.
Clearly if a caravan is to be connected to the mains, it must have a pressure limiting valve or regulator to prevent excess pressure reaching the van fittings.
The problem is that the majority of such valves fitted to mains water hoses, do have a flow restricting effect. You are mot likely experiencing this.
Sadly, there is normally no adjustment on the regulator valve, but if the effect is severe it may be a faulty unit.
Some people compromise by fitting a float valve (like a toilet cistern type) to a water container, and connect it to the tap. The water container is automatically topped up, and then they use a normal pump to lift the water into the caravan.
This has two advantages over direct fitting, firstly it maintains a better flow of water into the caravan, and secondly if prevents the possibility of the caravan fittings bursting if the regulator valve fails on the hosepipe.
Damian
Moderator
Darren, as John has explained at length the reason why the pressure is not what you thought you would get, just a word of warning.
Having just come home from refitting almost every single join in a caravan system, DO NOT use a mains hose direct to the van!!!!, even the pressure reducing ones.
It is much safer to use the system which keeps your aquaroll half full, and the submersible pump to draw the water into the van.
Another point is that should, as happened to this unfortunate couple, the water system bursts as a result of using one of these systems, it is NOT covered by Warranty, and after 6 hours work, believe me its not cheap to have the water system brought back into use, not counting the wet everything in th evan as well, and I mean everything!!.
Having just come home from refitting almost every single join in a caravan system, DO NOT use a mains hose direct to the van!!!!, even the pressure reducing ones.
It is much safer to use the system which keeps your aquaroll half full, and the submersible pump to draw the water into the van.
Another point is that should, as happened to this unfortunate couple, the water system bursts as a result of using one of these systems, it is NOT covered by Warranty, and after 6 hours work, believe me its not cheap to have the water system brought back into use, not counting the wet everything in th evan as well, and I mean everything!!.
thank you four your help john,i have just got the drum and hose you mentioned for our next trip thanks
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