Hoselock keeps bursting off di vessel under pressure

Ok guys help needed please

So I run a double di set up and my issue is my hose lock connection on the inlet directly from the pump bursts when I increase my pump controller level above 45 !!!

I have replaced hose locks , checked di vessel connections both di vessels are less than 1year old new from WCW and operate fine until I increase my pump controller above 45 then my connection on the inlet nearest the pump always burst off flooding the van :/

On normal cleans I can and have managed this long with a lower pressure of water however some recent first cleans I've wanted a bit more blast and can't because of it bursting

Thanks for any replies

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Pressure is way to high

County Durham Lad

I recommend switching to jg fittings, they are far more secure

Pressure to high - Would this still be the same even if water was flowing so no pressure build up ???

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CM Cleaning Services said:

Ok guys help needed please

So I run a double di set up and my issue is my hose lock connection on the inlet directly from the pump bursts when I increase my pump controller level above 45 !!!

I have replaced hose locks , checked di vessel connections both di vessels are less than 1year old new from WCW and operate fine until I increase my pump controller above 45 then my connection on the inlet nearest the pump always burst off flooding the van :/

On normal cleans I can and have managed this long with a lower pressure of water however some recent first cleans I've wanted a bit more blast and can't because of it bursting

Thanks for any replies

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Click to expand...

As a temporary measure you could ty it to the reel or tape it to the reel from back of both connectors. But as 007 says, better fittings.

Try replacing the connectors, mine did this swapped it and was fine after

I have renewed all connections already but still does it

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try brass fittings and have you a blockage in one of your di vessels?

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How would I tell if I had a blockage ???

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Just to add to this then it doesn't burst off if I have 1 di ??? But soon as I hook them together no matter which one is first it always burst at the first inlet

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Move the DI before the pump, so you suck water through them rather than push. Works fine for me, though I use the most expensive metal hozelocks.

Is that ok to do put them before pump rather than after

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Have you checked that the plastic luggs are ok that hold it onto the male ? You might have one Broken off 

All hose locks are new recently :/

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CM Cleaning Services said:

Is that ok to do put them before pump rather than after

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Click to expand...

Yes why wouldn't it be? The water needs to be moved through the granulate, that's it. I've done it for years with no issues.

Edit: just read some people say a pressure vessel can't be used as a vacuum vessel for some reason. So might need a second opinion on this.

As @Pjj says, the hozelocks male type that are screwed into the tank can develop cracks, and the o rings on them can wear out. Remember to change those as well, not only the female types.

and did it blow off before you changed them?

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Yes hose locks have been blowing off now for few weeks so I changed them to new and still have same issue

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Ok guys another thought .... I have microbore hose from pump to the first di inlet now the outlet to inlet on the next di is standard garden hose then microbore hose from output to reel ...... could the normal hose between di vessels be the problem ??? As it will allow more water through between the di vessel but its too much to get through microbore hose out so causing back pressure to burst ????

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I have hozelock connectors from the pump outlet to 1/2" hose and then to a hozelock connector on the reel inlet. Two places where they are receiving the full pressure of the pump. I have a boost button on a remote that bypasses my flow controller and wires the pump (shurflo 100psi) directly to my battery (110ah) giving it the max pressure possible when I need it and it's never blown off either connector. They are only plastic ones too but I even used to use cheap £1 ones too with no issues.

If yours are blowing off with new ones then there's definitely something wrong.

Possibly your pump isn't turning off early enough when the pressure builds after closing the tap. Does it sound like it's labouring for a long time after you turn the water off?

Also when you said you've replaced them, did you change both parts or just the female coupler? If the male connector is worn/badly made even a new female connector will pop off.

A non return valve between you two dis may solve it. Or you could use one di to fill the tank then use the second di from the tank to reel?


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Are you using genuine hoselock? The male and female need to be good quality and same brand.
I have found in the past a good quality male and female of different brands can cause leaks etc.

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