Dec 9, 2022
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Hi,

Do rebuild of old van. Going towards water use in winter, i got crystal2/fitapac outlet with filter. Will need to take Aqua roll inside(according to booklet there is solution that i should use one more outlet connect to one outside from inside and use blank cup on outter or vise versa depends which one i gonna use - that one i didnt find to be sold and overall i really dont like this solution along with using filters attached to inlets hardway - i will likely buy inline), will do T cross on pipes and will use some closing valves on each branch so i can choose which i will use. Yet i had just idea that i would put instead of switches non-return valves, which i thought wouldnt be bad, yet i just see if there would be further blockage of any sort, can this end up with leak/broken fitting as there is no counter pressure for pump once there is non return valve installed(this might be just fundamentally wrong so correct me here). And even without any valve, is pump 14L/min able to break smth with pressure - its likely stronger than very old i got it with van i got, i doubt it, but who knows, lack of experience
 
Nov 11, 2009
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Hi,

Do rebuild of old van. Going towards water use in winter, i got crystal2/fitapac outlet with filter. Will need to take Aqua roll inside(according to booklet there is solution that i should use one more outlet connect to one outside from inside and use blank cup on outter or vise versa depends which one i gonna use - that one i didnt find to be sold and overall i really dont like this solution along with using filters attached to inlets hardway - i will likely buy inline), will do T cross on pipes and will use some closing valves on each branch so i can choose which i will use. Yet i had just idea that i would put instead of switches non-return valves, which i thought wouldnt be bad, yet i just see if there would be further blockage of any sort, can this end up with leak/broken fitting as there is no counter pressure for pump once there is non return valve installed(this might be just fundamentally wrong so correct me here). And even without any valve, is pump 14L/min able to break smth with pressure - its likely stronger than very old i got it with van i got, i doubt it, but who knows, lack of experience
I used to remove the makers filter and do without it. U.K. and continental water is good quality, and if it was too chlorinated we would buy bottled water for drinking, but that was a rarity.
 
Mar 14, 2005
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Hi,

Doing rebuild of old van. Going towards water use in winter,

I've got crystal2/fitapac outlet with filter. Will need to take Aqua roll inside (according to booklet there is solution that i should use one more outlet connect to one outside from inside and use blank cup on outter or vise versa depends which one i gonna use - that one i didnt find to be sold and overall i really dont like this solution along with using filters attached to inlets hardway - i will likely buy inline),

I will do T cross on pipes and will use some closing valves on each branch so i can choose which i will use.

Yet i had just idea that i would put instead of switches non-return valves, which i thought wouldnt be bad, yet i just see if there would be further blockage of any sort, can this end up with leak/broken fitting as there is no counter pressure for pump once there is non return valve installed(this might be just fundamentally wrong so correct me here).

And even without any valve, is pump 14L/min able to break smth with pressure - its likely stronger than very old i got it with van i got, i doubt it, but who knows, lack of experience

Helo PetrK.

Welcome to the forum.

I hope I have understood your posting correctly.

The Crystal winter system with the internal (non filtered) inlet is and old design and whilst some spare parts are still available, its getting much harder to find new ones in the shops or online. However there are several other makes that would do a similar job.

Water supplies in the UK and on the continent are OK to drink, there is no need to have filters built into caravan water systems, But if a caravan is not used for many weeks it is important to periodically cleaned with a steriliser.

When you suggest a "T" system I assume you mean this:-

1670590692213.png


This arrangement should work.

Your 14L/Min pump may damage your system by over pressuring the system. The maximum cold water pressure should not exceed 1.5Bar.
 
Dec 9, 2022
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Helo PetrK.

Welcome to the forum.

I hope I have understood your posting correctly.

The Crystal winter system with the internal (non filtered) inlet is and old design and whilst some spare parts are still available, its getting much harder to find new ones in the shops or online. However there are several other makes that would do a similar job.

Water supplies in the UK and on the continent are OK to drink, there is no need to have filters built into caravan water systems, But if a caravan is not used for many weeks it is important to periodically cleaned with a steriliser.

When you suggest a "T" system I assume you mean this:-

View attachment 4180


This arrangement should work.

Your 14L/Min pump may damage your system by over pressuring the system. The maximum cold water pressure should not exceed 1.5Bar.
Desc. of pump must be compromise as its states 0.5 bar, but 14L/minute. About scheme - pressure switch with NRV -> i am not sure what this is suppose to do in picture -> does is switch only when it feels pressure on one side only -> i mean outter side so water wouldnt go back in? If you can explain please.

This is only planning, today i looked at the system with idea gets some extra hose to do a testing of pump and system( caravan is 30y old in poor state), i drained 3 weeks ago or so, but there was residue in pipes and water gets trapped in frozen inside plastic pipes. To completely drain everything whats need to be done actually, i open drained plug today and there was about 3dl of water out i guess. how can i completely drain it, i will leave heater now on so hopefully water gets back to fluid state, i would need something to push it with air or smth.

Ah this filter is to make water drinkable, i got it out today, my intention is have separate tank for drinking water as sidesystem by sink and other system for shower sink as i described on top, i somehow dont wanna run water through these old pipes for drinking also cannot drink either from heater as tank is aluminium. So filter i would probably use is just to prevent dirts in, but you gave me idea i put some regular filter there, give it test and might succed gets drinking water out of it, but its too too far. i got serious damp issues around the van i need to address ASAP, i found bad spots today so will halt water, this is more for planning purposes really.
 
Jan 3, 2012
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Hi,

Do rebuild of old van. Going towards water use in winter, i got crystal2/fitapac outlet with filter. Will need to take Aqua roll inside(according to booklet there is solution that i should use one more outlet connect to one outside from inside and use blank cup on outter or vise versa depends which one i gonna use - that one i didnt find to be sold and overall i really dont like this solution along with using filters attached to inlets hardway - i will likely buy inline), will do T cross on pipes and will use some closing valves on each branch so i can choose which i will use. Yet i had just idea that i would put instead of switches non-return valves, which i thought wouldnt be bad, yet i just see if there would be further blockage of any sort, can this end up with leak/broken fitting as there is no counter pressure for pump once there is non return valve installed(this might be just fundamentally wrong so correct me here). And even without any valve, is pump 14L/min able to break smth with pressure - its likely stronger than very old i got it with van i got, i doubt it, but who knows, lack of experience
Hi petrk welcome to the forum sounds like you are handy with your hands me would preferred my caravan engineer to do it for me but good luck with your job .
 
Mar 14, 2005
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Desc. of pump must be compromise as its states 0.5 bar, but 14L/minute.

I am not aware of any caravan water pump with only 0.5Bar pressure with such a high 14L/min flow rate. What make and model of pump is it?

You tell us you have a "crystal" inlet system. The Crystal and most other fittings designed for caravans are only rated for a maximum cold water pressure of 1.5Bar. The diameter of the pipe work and fittings are unlikely to allow more than 6L/Min to pass through at 1.5Bar to any outlet . If your pump only delivers 0.5Bar, suspect it will give you a poor flow inside the caravan.

About scheme - pressure switch with NRV -> i am not sure what this is suppose to do in picture -> does is switch only when it feels pressure on one side only -> i mean outter side so water wouldnt go back in? If you can explain please.

Most caravans that had the Carver Crystal system fitted used a pressure switch to control the drop in submersible pump in the water tank. That is why I believed your caravan water system was controlled by a pressure switch. If the pressure in the caravans piping is low, it will turn the pump on to raise the pressure.

When the pressure reaches the pressure switches pre-set upper threshold, the switch operates and turns the pump off. The Pressure switch needs a Non Return Valve (NRV) up stream of the switch to prevent pressure leaking back to the cold water tank.

his is only planning, today i looked at the system with idea gets some extra hose to do a testing of pump and system( caravan is 30y old in poor state), i drained 3 weeks ago or so, but there was residue in pipes and water gets trapped in frozen inside plastic pipes. To completely drain everything whats need to be done actually, i open drained plug today and there was about 3dl of water out i guess. how can i completely drain it, i will leave heater now on so hopefully water gets back to fluid state, i would need something to push it with air or smth.

Ah this filter is to make water drinkable, i got it out today, my intention is have separate tank for drinking water as sidesystem by sink and other system for shower sink as i described on top, i somehow dont wanna run water through these old pipes for drinking also cannot drink either from heater as tank is aluminium. So filter i would probably use is just to prevent dirts in, but you gave me idea i put some regular filter there, give it test and might succed gets drinking water out of it, but its too too far. i got serious damp issues around the van i need to address ASAP, i found bad spots today so will halt water, this is more for planning purposes really.

If you have damp problems in the caravan do not spend any more money on the caravan until you have all the water leaks repaired. All bad wood must be removed completely to get rid of any mould spoors.
 
Dec 9, 2022
6
1
15
Visit site
I am not aware of any caravan water pump with only 0.5Bar pressure with such a high 14L/min flow rate. What make and model of pump is it?

You tell us you have a "crystal" inlet system. The Crystal and most other fittings designed for caravans are only rated for a maximum cold water pressure of 1.5Bar. The diameter of the pipe work and fittings are unlikely to allow more than 6L/Min to pass through at 1.5Bar to any outlet . If your pump only delivers 0.5Bar, suspect it will give you a poor flow inside the caravan.



Most caravans that had the Carver Crystal system fitted used a pressure switch to control the drop in submersible pump in the water tank. That is why I believed your caravan water system was controlled by a pressure switch. If the pressure in the caravans piping is low, it will turn the pump on to raise the pressure.

When the pressure reaches the pressure switches pre-set upper threshold, the switch operates and turns the pump off. The Pressure switch needs a Non Return Valve (NRV) up stream of the switch to prevent pressure leaking back to the cold water tank.



If you have damp problems in the caravan do not spend any more money on the caravan until you have all the water leaks repaired. All bad wood must be removed completely to get rid of any mould spoors.

I am not aware of any caravan water pump with only 0.5Bar pressure with such a high 14L/min flow rate. What make and model of pump is it?

You tell us you have a "crystal" inlet system. The Crystal and most other fittings designed for caravans are only rated for a maximum cold water pressure of 1.5Bar. The diameter of the pipe work and fittings are unlikely to allow more than 6L/Min to pass through at 1.5Bar to any outlet . If your pump only delivers 0.5Bar, suspect it will give you a poor flow inside the caravan.



Most caravans that had the Carver Crystal system fitted used a pressure switch to control the drop in submersible pump in the water tank. That is why I believed your caravan water system was controlled by a pressure switch. If the pressure in the caravans piping is low, it will turn the pump on to raise the pressure.

When the pressure reaches the pressure switches pre-set upper threshold, the switch operates and turns the pump off. The Pressure switch needs a Non Return Valve (NRV) up stream of the switch to prevent pressure leaking back to the cold water tank.



If you have damp problems in the caravan do not spend any more money on the caravan until you have all the water leaks repaired. All bad wood must be removed completely to get rid of any mould spoors.


I am not sure but i think carver heater cascade 2 has NRV in Cold water inlet. I didnt actually saw any pressure switch before heater, there are just plain pipes Y shape one goes to heater other plain cold water to sink and shower, so looks like that.

Yeah will become damp specialist soon enought :)
 

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