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UK diy (uk.d-i-y) For the discussion of all topics related to diy (do-it-yourself) in the UK. All levels of experience and proficency are welcome to join in to ask questions or offer solutions. |
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#1
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Bosch pressure washer spitting the hose off.
Hello all.
Just bought a Bosch pressure washer to replace the 20 year old Wickes one that finally bit the dust. The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. Anyone know if this is normal? Or should I take it back? Or just change the hose fitting? -- Paul. https://paulc.es |
#2
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Bosch pressure washer spitting the hose off.
On 6/11/2016 1:11 PM, Paul wrote:
Hello all. Just bought a Bosch pressure washer to replace the 20 year old Wickes one that finally bit the dust. The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. Anyone know if this is normal? Or should I take it back? Or just change the hose fitting? I'm a bit confused. Every pressure washer I have seen has had a threaded connector between the pressure hose and the machine. What you are describing sounds like a feature of some hozelock couplings which are only rated for domestic water (about 3 bar). Take it back. |
#3
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Bosch pressure washer spitting the hose off.
Paul wrote:
The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. My Nilfisk specifically recommended not using the "waterstop" type hose connector onto the pressure washer ... |
#4
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Bosch pressure washer spitting the hose off.
newshound wrote:
I'm a bit confused. Every pressure washer I have seen has had a threaded connector between the pressure hose and the machine. What you are describing sounds like a feature of some hozelock couplings which are only rated for domestic water I presumed he was talking about the mains inlet to the P/W ... |
#5
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Bosch pressure washer spitting the hose off.
Andy Burns wrote:
Paul wrote: The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. My Nilfisk specifically recommended not using the "waterstop" type hose connector onto the pressure washer ... I imagine that's just because of potential flow restriction, I can't see it affecting the connector "grip". To the OP, I'd just try a different hosepipe fitting, preferably without the waterstop feature. Tim -- Trolls and troll feeders go in my killfile |
#6
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Bosch pressure washer spitting the hose off.
Tim+ wrote:
I imagine that's just because of potential flow restriction, They don't have a particularly high flow rate. I can't see it affecting the connector "grip". I imagine it's the rapid shut off (solenoid valve?) of the P/W when releasing the trigger that causes the inlet to blow off. |
#7
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Bosch pressure washer spitting the hose off.
Andy Burns wrote:
newshound wrote: I'm a bit confused. Every pressure washer I have seen has had a threaded connector between the pressure hose and the machine. What you are describing sounds like a feature of some hozelock couplings which are only rated for domestic water I presumed he was talking about the mains inlet to the P/W ... Well, yes. Hence "hose pipe". -- Paul. https://paulc.es |
#8
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Bosch pressure washer spitting the hose off.
Tim+ wrote:
Andy Burns wrote: Paul wrote: The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. My Nilfisk specifically recommended not using the "waterstop" type hose connector onto the pressure washer ... I imagine that's just because of potential flow restriction, I can't see it affecting the connector "grip". To the OP, I'd just try a different hosepipe fitting, preferably without the waterstop feature. Will try that, thanks. Can't find one right now, and shops all shut until Monday. -- Paul. https://paulc.es |
#9
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Bosch pressure washer spitting the hose off.
Andy Burns wrote:
Tim+ wrote: I imagine that's just because of potential flow restriction, They don't have a particularly high flow rate. If your mains pressure isn't great an auto stop valve on the end may be just the straw that breaks the camel's back. I can't see it affecting the connector "grip". I imagine it's the rapid shut off (solenoid valve?) of the P/W when releasing the trigger that causes the inlet to blow off. Well yes, but please share your theory as to why an auto-stop hose connector blows off more easily than a standard one. Tim -- Trolls and troll feeders go in my killfile |
#10
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Bosch pressure washer spitting the hose off.
Tim+ wrote:
please share your theory as to why an auto-stop hose connector blows off more easily than a standard one. With a standard connector, the sudden back pressure when turning off can be absorbed by the full length of the hose pipe. With a waterstop connector the back-pressure is all between the valve inside the pressure washer and the hose connector, probably on rigid pipework, so is exerted directly onto the connector ... |
#11
Posted to uk.d-i-y
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Bosch pressure washer spitting the hose off.
Andy Burns wrote:
Tim+ wrote: please share your theory as to why an auto-stop hose connector blows off more easily than a standard one. With a standard connector, the sudden back pressure when turning off can be absorbed by the full length of the hose pipe. As it can with an waterstop. With a waterstop connector the back-pressure is all between the valve inside the pressure washer and the hose connector, probably on rigid pipework, so is exerted directly onto the connector ... Wrong. A waterstop valve only occluded the pipe when it is physically disconnected. As long as it is connected, there is continuity. Tim -- Trolls and troll feeders go in my killfile |
#12
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Bosch pressure washer spitting the hose off.
Tim+ wrote:
A waterstop valve only occluded the pipe when it is physically disconnected. As long as it is connected, there is continuity. Fair enough, I thought it acted as a form of non-return valve too. |
#13
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Bosch pressure washer spitting the hose off.
On Saturday, 11 June 2016 13:43:18 UTC+1, newshound wrote:
On 6/11/2016 1:11 PM, Paul wrote: Hello all. Just bought a Bosch pressure washer to replace the 20 year old Wickes one that finally bit the dust. The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. Anyone know if this is normal? Or should I take it back? Or just change the hose fitting? I'm a bit confused. Every pressure washer I have seen has had a threaded connector between the pressure hose and the machine. What you are describing sounds like a feature of some hozelock couplings which are only rated for domestic water (about 3 bar). Take it back. Mine has a hozelock connector. Male part) Try changing the hozelock bit on your hosepipe before taking it back. The female bit most commonly goes wrong. |
#14
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Bosch pressure washer spitting the hose off.
On 11/06/2016 14:24, Andy Burns wrote:
Tim+ wrote: I imagine that's just because of potential flow restriction, They don't have a particularly high flow rate. I can't see it affecting the connector "grip". I imagine it's the rapid shut off (solenoid valve?) of the P/W when releasing the trigger that causes the inlet to blow off. They use a pressure switch rather than a solenoid. -- Dave - The Medway Handyman |
#15
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Bosch pressure washer spitting the hose off.
On 11/06/2016 14:18, Tim+ wrote:
Andy Burns wrote: Paul wrote: The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. My Nilfisk specifically recommended not using the "waterstop" type hose connector onto the pressure washer ... I imagine that's just because of potential flow restriction, I can't see it affecting the connector "grip". To the OP, I'd just try a different hosepipe fitting, preferably without the waterstop feature. The problem with the waterstop is a spring loaded N/R valve. Since the pump sucks it forces the valve shut & stops the flow. -- Dave - The Medway Handyman |
#16
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Bosch pressure washer spitting the hose off.
On 11/06/2016 14:51, Paul wrote:
Tim+ wrote: Andy Burns wrote: Paul wrote: The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. My Nilfisk specifically recommended not using the "waterstop" type hose connector onto the pressure washer ... I imagine that's just because of potential flow restriction, I can't see it affecting the connector "grip". To the OP, I'd just try a different hosepipe fitting, preferably without the waterstop feature. Will try that, thanks. Can't find one right now, and shops all shut until Monday. Easy enough to convert it. Take it apart & remove the disc & spring. -- Dave - The Medway Handyman |
#17
Posted to uk.d-i-y
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Bosch pressure washer spitting the hose off.
I imagine that's just because of potential flow restriction, I can't see it affecting the connector "grip". To the OP, I'd just try a different hosepipe fitting, preferably without the waterstop feature. The problem with the waterstop is a spring loaded N/R valve. Since the pump sucks it forces the valve shut & stops the flow. I don't think so Dave, The Water Stop is held open by the male part pushing it off the seal face. The OP probably just has a worn out or imitation Hoselock fitting. I had some Aldo ones once that were not very good when used with a proper hoselock although okay with each other. |
#18
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Bosch pressure washer spitting the hose off.
David Lang wrote:
On 11/06/2016 14:18, Tim+ wrote: Andy Burns wrote: Paul wrote: The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. My Nilfisk specifically recommended not using the "waterstop" type hose connector onto the pressure washer ... I imagine that's just because of potential flow restriction, I can't see it affecting the connector "grip". To the OP, I'd just try a different hosepipe fitting, preferably without the waterstop feature. The problem with the waterstop is a spring loaded N/R valve. Sorry Dave, but as I've explained, this is exactly what a waterstop valve *isn't*. My waterstop valves are neither spring loaded or non-return. In normal use water flow will try to close the valve but if the hose is connected to a male connector the male part holds the valve open. It cannot close in this circumstance, even if suction is applied. It will introduce some flow restriction though compared to a non-waterstop valve which is I think the main reason for not using one with a pressure washer. Tim -- Trolls and troll feeders go in my killfile |
#19
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Bosch pressure washer spitting the hose off.
But that sounds a bit counter intuitive as in effect its sucking at that
point so how can this produce the opposite effect one wonders unless its faulty. Brian -- ----- - This newsgroup posting comes to you directly from... The Sofa of Brian Gaff... Blind user, so no pictures please! "Paul" wrote in message ... Andy Burns wrote: newshound wrote: I'm a bit confused. Every pressure washer I have seen has had a threaded connector between the pressure hose and the machine. What you are describing sounds like a feature of some hozelock couplings which are only rated for domestic water I presumed he was talking about the mains inlet to the P/W ... Well, yes. Hence "hose pipe". -- Paul. https://paulc.es |
#20
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Bosch pressure washer spitting the hose off.
DerbyBorn wrote:
The OP probably just has a worn out or imitation Hoselock fitting. I had some Aldo ones once that were not very good when used with a proper hoselock although okay with each other. I swapped it for another which works just fine. -- Paul. https://paulc.es |
#21
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Bosch pressure washer spitting the hose off.
David Lang wrote:
On 11/06/2016 14:51, Paul wrote: Tim+ wrote: Andy Burns wrote: Paul wrote: The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. My Nilfisk specifically recommended not using the "waterstop" type hose connector onto the pressure washer ... I imagine that's just because of potential flow restriction, I can't see it affecting the connector "grip". To the OP, I'd just try a different hosepipe fitting, preferably without the waterstop feature. Will try that, thanks. Can't find one right now, and shops all shut until Monday. Easy enough to convert it. Take it apart & remove the disc & spring. No need. Fitted another with gismo and it works ok. -- Paul. https://paulc.es |
#22
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Bosch pressure washer spitting the hose off.
Paul wrote:
DerbyBorn wrote: The OP probably just has a worn out or imitation Hoselock fitting. I had some Aldo ones once that were not very good when used with a proper hoselock although okay with each other. I swapped it for another which works just fine. Yes. I have a box of these things, some work fine, some drip and some just fall of the fitting. |
#23
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Bosch pressure washer spitting the hose off.
On Sun, 12 Jun 2016 18:52:51 +0100, Mr Pounder Esquire wrote:
Paul wrote: DerbyBorn wrote: The OP probably just has a worn out or imitation Hoselock fitting. I had some Aldo ones once that were not very good when used with a proper hoselock although okay with each other. I swapped it for another which works just fine. Yes. I have a box of these things, some work fine, some drip and some just fall of the fitting. You have a dripping cock? -- Why do I have to wear a shirt and tie to go in a bar to see a topless dancer? |
#24
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Bosch pressure washer spitting the hose off.
On 12/06/2016 09:28, Tim+ wrote:
David Lang wrote: On 11/06/2016 14:18, Tim+ wrote: Andy Burns wrote: Paul wrote: The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. My Nilfisk specifically recommended not using the "waterstop" type hose connector onto the pressure washer ... I imagine that's just because of potential flow restriction, I can't see it affecting the connector "grip". To the OP, I'd just try a different hosepipe fitting, preferably without the waterstop feature. The problem with the waterstop is a spring loaded N/R valve. Sorry Dave, but as I've explained, this is exactly what a waterstop valve *isn't*. My waterstop valves are neither spring loaded or non-return. In normal use water flow will try to close the valve but if the hose is connected to a male connector the male part holds the valve open. It cannot close in this circumstance, even if suction is applied. It will introduce some flow restriction though compared to a non-waterstop valve which is I think the main reason for not using one with a pressure washer. Tim I had trouble with a Hozelock branded fitting. The swivelling of the spray head had worn the moving bit down and then it didn't stay open when you plugged it in. Cheap plastic inside an alloy shell that I won't recommend. |
#25
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Bosch pressure washer spitting the hose off.
On Saturday, 11 June 2016 13:11:36 UTC+1, Paul wrote:
Hello all. Just bought a Bosch pressure washer to replace the 20 year old Wickes one that finally bit the dust. The hose pipe has the "safety" connection that closes when there's nothing connected. I switch the machine on and all well, until I release the trigger, when the hose connector pops off the machine. Anyone know if this is normal? Or should I take it back? Or just change the hose fitting? -- Paul. https://paulc.es hi paul got the same problem on my bosch works ok on standard connection but spits the valve type connection off does the same on titan pressure washer used a male to male connector and a small extension hose using standard valves No more problems wanted to keep the valve connector on my garden hose reel seems to me it is the design of the male connection on the newer pressure washers that is the problem ?? [retired engineer ] |
#27
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Bosch pressure washer spitting the hose off.
TMH wrote:
wrote: seems to me it is the design of the male connection on the newer pressure washers that is the problem ??Â* [retired engineer ] Inlet hose or outlet? My hose reel is fitted with a "waterstop" connector at the end, my nilfisk pressure washer will sometimes pop the connector off its inlet if the connector isn't pushed-on cleanly. Making sure the connector is pushed on firmly and squarely, then giving it a twist and a tug to check is generally enough to make sure it stays on. |
#28
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Bosch pressure washer spitting the hose off.
On 24/04/2019 07:32, Andy Burns wrote:
TMH wrote: wrote: seems to me it is the design of the male connection on the newer pressure washers that is the problem ??Â* [retired engineer ] Inlet hose or outlet? My hose reel is fitted with a "waterstop" connector at the end, my nilfisk pressure washer will sometimes pop the connector off its inlet if the connector isn't pushed-on cleanly. Making sure the connector is pushed on firmly and squarely, then giving it a twist and a tug to check is generally enough to make sure it stays on. The male part of the hose connection on my pressure washer is screwed on and the washer itself has the same thread as a garden tap. My hose used to pop off as well and simply changing both the male and female hose connectors for a new, matched pair solved it. Wear in either component, slight size or shape differences from different manufacturers, even dirt in the retaining mechanism, can all cause problems. SteveW |
#29
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Bosch pressure washer spitting the hose off.
On 24/04/2019 07:32, Andy Burns wrote:
TMH wrote: wrote: seems to me it is the design of the male connection on the newer pressure washers that is the problem ??Â* [retired engineer ] Inlet hose or outlet? My hose reel is fitted with a "waterstop" connector at the end, my nilfisk pressure washer will sometimes pop the connector off its inlet if the connector isn't pushed-on cleanly. Making sure the connector is pushed on firmly and squarely, then giving it a twist and a tug to check is generally enough to make sure it stays on. The waterstop connector is causing the problem, replace it or remove the disc & spring. -- Dave The Medway Handyman |
#30
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Bosch pressure washer spitting the hose off.
TMH wrote:
The waterstop connector is causing the problem I realise that, the P/W instructions do recommend against using one. replace it or remove the disc & spring. But I like having the waterstop end so I can switch from P/W to rinsing with a hoze nozzle without going back to turn off at the tap, and with care when connecting, it's rarely a problem. |
#31
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Bosch pressure washer spitting the hose off.
On Wednesday, April 24, 2019 at 11:56:31 AM UTC+1, Andy Burns wrote:
TMH wrote: The waterstop connector is causing the problem I realise that, the P/W instructions do recommend against using one. replace it or remove the disc & spring. But I like having the waterstop end so I can switch from P/W to rinsing with a hoze nozzle without going back to turn off at the tap, and with care when connecting, it's rarely a problem. I just fold my hose to stop the water if I want to change an attachment. I find the waterstop valves too restrictive. Tim |
#32
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Bosch pressure washer spitting the hose off.
On Wed, 24 Apr 2019 11:56:27 +0100, Andy Burns wrote:
But I like having the waterstop end so I can switch from P/W to rinsing with a hoze nozzle without going back to turn off at the tap, and with care when connecting, it's rarely a problem. Just saying- there's quick-connect things without waterstop but a full-bore ball valve instead. Googling says it's a "Hose Connector with Control Valve". Thomas Prufer |
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