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Post by Clinton Cool on Nov 29, 2016 10:43:15 GMT
I have a slight leak where the pump connects to the pipe, on the pressurised side. It's not a massive problem but means the pump comes on for a second or two every so often, and the drip tray I've put underneath the connection needs emptying every couple of days. Needs sorting.
It's all a bit tight down there and my efforts to fix it so far have failed. I've tried nipping up the screw connector but this makes the drip worse. The pump, a Jabsco, appears to have a couple of plastic things that hold the connectors to the pump. I think these may need to be removed so the screw connectors can be removed, then ptfe tape in the thread to hopefully solve the problem. I've had a quick go at removing the platic tabs, but no luck.
Does anyone know this pump, any tips?
Cheers
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Deleted
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Post by Deleted on Nov 29, 2016 10:51:02 GMT
I have a Jabsco Parmax, the blue tabs should easily pull out.You may have deformed the pipe if done up too much. It shouldn't require PTFE. If the pipe has been deformed by a jubilee clip, is it possible to cut the pipe back a bit, assuming you have the length to do it and remake the connections?
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Post by Clinton Cool on Nov 29, 2016 11:01:48 GMT
I'll have another go at the blue tabs. The leak is definitely coming from the screw connectors, where they screw into the black plastic bits that are held in by the blue tabs, rather than where jubilee clips connect the water pipe to the male end of the connectors.
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Post by geo on Nov 29, 2016 12:46:29 GMT
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Post by smileypete on Nov 29, 2016 12:47:38 GMT
Fernox LS-X jointing compound is great for sealing threaded connections, do follow instructions though.
ISTR someone saying the O rings on the quick connectors are a weak point, so a smear of LS-X might help there too.
When using the stuff it's good to just use it on the male side so any excess doesn't get pushed into the system and cause problems.
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Post by Clinton Cool on Nov 30, 2016 16:07:48 GMT
I re did the connections, it's solved the leak. However, now, after I've turned the tap off the pump rumbles on for 4 or 5 seconds. This has happened before but only when the batteries are depleted. The wire serving it is 2.5mm, should be 4mm, so suffering from voltage drop. It's doing it right now though, the batteries are fully charged.
Any ideas?
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Post by smileypete on Nov 30, 2016 16:26:19 GMT
Good to hear it's no longer incontinent. The run-on could be some air trapped somewhere, if there's an accumulator then with the tap opened slowly you should get about half the volume of the accumulator before the pump kicks in.. For checking out the wiring maybe try and put a multimeter across the pump motor and read the volts while it's running, not easy if the pump is in some god forsaken hidey hole! 2.5mm 2 should be good for 7 amps and a 10 metre round trip from the batts and back on a 12V boat. Then again water pumps are usually pretty tolerant to low voltage so you could push that to 15m or even 20m. 7 amps seems about right for a typical 10 litre per minute pump. Of course the connections back to the batts need to be sound too...
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Post by Gone on Nov 30, 2016 18:49:26 GMT
I have an accumulator on my system and my pump will run for a good 15 seconds after turning off the tap while it re-pressurises the system. On turning on the tap I get about half a pint before the pressure is low enough for the pump to start.
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Post by Clinton Cool on Dec 1, 2016 12:11:21 GMT
I don't have an accumulator, the pump serves the tap in the kitchen and also the shower directly. I ran both this morning to clear any possible air locks. No obvious gurgling or spitting to suggest that was the problem. Now I've done this the pump is still behaving the same i.e. when the voltage is high it switches off immediately but if it's 12.6 or lower, at the fuse board, it shudders for a few seconds before stopping. I've double checked the wire that serves it and although I'm not sure, it might be 1.5mm2 rather than 2.5. The wire runs about 22 feet from the fuseboard to the pump. I realise that this is too thin really but why didn't the pump behave this way before I fixed the leak? Is the pump perhaps on the way out?
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Post by Deleted on Dec 1, 2016 14:20:00 GMT
I don't have an accumulator, the pump serves the tap in the kitchen and also the shower directly. I ran both this morning to clear any possible air locks. No obvious gurgling or spitting to suggest that was the problem. Now I've done this the pump is still behaving the same i.e. when the voltage is high it switches off immediately but if it's 12.6 or lower, at the fuse board, it shudders for a few seconds before stopping. I've double checked the wire that serves it and although I'm not sure, it might be 1.5mm2 rather than 2.5. The wire runs about 22 feet from the fuseboard to the pump. I realise that this is too thin really but why didn't the pump behave this way before I fixed the leak? Is the pump perhaps on the way out? Our pump does much the same, at higher voltage when the batteries are on charge, the pump switches off much quicker, as you would expect. The pump is approx 55 foot from the pump, on fairly thin cable. Maybe measure the voltage at the actual pump.
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Post by geo on Dec 1, 2016 14:36:35 GMT
I don't have an accumulator, the pump serves the tap in the kitchen and also the shower directly. I ran both this morning to clear any possible air locks. No obvious gurgling or spitting to suggest that was the problem. Now I've done this the pump is still behaving the same i.e. when the voltage is high it switches off immediately but if it's 12.6 or lower, at the fuse board, it shudders for a few seconds before stopping. I've double checked the wire that serves it and although I'm not sure, it might be 1.5mm2 rather than 2.5. The wire runs about 22 feet from the fuseboard to the pump. I realise that this is too thin really but why didn't the pump behave this way before I fixed the leak? Is the pump perhaps on the way out? Suspect the reason it did not do it when you had the leak was the rise to turn off pressure was much gentler because of the lead. No leak and it reached turn off pressure with a bump, pump stops and pressure drops a bit pump restarts and so on until it settles.
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Post by smileypete on Dec 1, 2016 18:03:26 GMT
Maybe some trapped air in a horizontal calorifier?
Hard to say for sure about the wiring without a voltage check as described above.
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Post by Gone on Dec 1, 2016 18:24:05 GMT
I am sure that sometimes there are things that are not quite right but I don't notice them until something bigger happens then all the little things appear and I wonder why they just started.
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