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Post by Delta9 on Mar 17, 2017 13:12:14 GMT
I have no idea how it is possible for this to happen.. My fresh water pump packed up, so this morning I have been replacing it, not helped by the fact it is in a bit of an awkward location meaning that contortionist skills are needed to get in there and access it. My task this morning has been made doubly difficult by the fact I have been unable to shut off the water coming from the water tank.. This is the bastard in question.  With it turned fully right, or fully left, water keeps on coming. How and why would it do this? I am no valve expert, but I thought that this was a pretty simple device with not a lot to go wrong. Am I going to have to completely drain my water tank and swap it out? |
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Post by JohnV on Mar 17, 2017 13:37:59 GMT
It looks like a fairly standard cheapish gate valve. Whatever has gone wrong with it you would have to drain the tank (or freeze the pipe above it) to fix.
Your right they are a fairly simple device with not a lot to go wrong, but they still can ..... and do. The most likely thing with one like that yours (that has probably been in the "on" position for 99% of it's life) is that it has built up lime scale and it is preventing it from seating properly.
They are fairly easy to overhaul but they are so flippin cheap that it's not really worth it
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Post by peterboat on Mar 17, 2017 13:41:18 GMT
As john says but check that the nut on the tap bit is tight you never know
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Post by Deleted on Mar 17, 2017 14:04:34 GMT
bin it and put a ball valve in its place, gate valves are shite in nearly all their applications! Scale and corrosion build up under the gate preventing it from shutting - a boat should use DZR brass ball valves as well - whether a seacock or domestic appliance valve. not much dearer than the cheap stuff. here is an example for you. www.asap-supplies.com/dzr-valve-female-each-end-405703When we got our boat the rough arse bastards had used them for the seacocks, utter crap. we now have DZR ball valves all round. |
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Post by canaldweller on Mar 17, 2017 14:12:51 GMT
bin it and put a ball valve in its place, gate valves are shite in nearly all their applications! Scale and corrosion build up under the gate preventing it from shutting - a boat should use DZR brass ball valves as well - whether a seacock or domestic appliance valve. not much dearer than the cheap stuff. here is an example for you. www.asap-supplies.com/dzr-valve-female-each-end-405703When we got our boat the rough arse bastards had used them for the seacocks, utter crap. we now have DZR ball valves all round. Are there any adapters available to make it fit Delta9's pipework? |
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Post by Jim on Mar 17, 2017 14:19:43 GMT
Arctic freeze kit and a new valve. Can you access about 10 " straight pipe on the tank side of the valve to freeze it?
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Post by Deleted on Mar 17, 2017 14:41:47 GMT
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Post by JohnV on Mar 17, 2017 14:44:00 GMT
what about using a speedfit stop valve and keep it all plastic ??
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Post by Gone on Mar 17, 2017 14:53:16 GMT
I had the same problem on my heating system, gate valve would not shut. Inside there is a shutter that screws down and there was a load of scale at the bottom of the stroke, so impossible to close it. Now has a ball valve.
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Post by Deleted on Mar 17, 2017 14:56:30 GMT
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Post by canaldweller on Mar 17, 2017 15:31:27 GMT
I have two of these that I have fitted in place of gate valves. They are to swap between the cauliflower and the paloma. The problem I have is that they are rather stiff to turn. Do you, or anyone else, have any ideas as to how I can get more leverage on the things? Otherwise it's back to your first suggestion for Delta9. |
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Post by Deleted on Mar 17, 2017 16:28:21 GMT
I have two of these that I have fitted in place of gate valves. They are to swap between the cauliflower and the paloma. The problem I have is that they are rather stiff to turn. Do you, or anyone else, have any ideas as to how I can get more leverage on the things? Otherwise it's back to your first suggestion for Delta9. One of these? m.ebay.co.uk/itm/332154370675?_trksid=p2141725.m3641.l6368 |
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Post by naughtyfox on Mar 17, 2017 19:03:40 GMT
How about sticking a rubber bung in the pipe to hold water back whilst you change the pump or whatever it is...
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Post by Telemachus on Mar 17, 2017 19:23:36 GMT
I have no idea how it is possible for this to happen.. My fresh water pump packed up, so this morning I have been replacing it, not helped by the fact it is in a bit of an awkward location meaning that contortionist skills are needed to get in there and access it. My task this morning has been made doubly difficult by the fact I have been unable to shut off the water coming from the water tank.. This is the bastard in question. With it turned fully right, or fully left, water keeps on coming. How and why would it do this? I am no valve expert, but I thought that this was a pretty simple device with not a lot to go wrong. Am I going to have to completely drain my water tank and swap it out? Just checking, but how many turns did you rotate the vale in trying to turn it off? I ask because Jeff was recently down to the boat on his own. He complained that he could get the water on. It transpired that he'd turned the valve about 1/4 turn which is the slack in the system. (Normally I do it of course). Once he'd realised there was a bit of stiction and it had to be rotated several complete turns, all was fine. But if you have rotated it several turns and the water still comes out, as said it has become gunged up with limescale |
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Post by Deleted on Mar 17, 2017 19:47:16 GMT
I have no idea how it is possible for this to happen.. My fresh water pump packed up, so this morning I have been replacing it, not helped by the fact it is in a bit of an awkward location meaning that contortionist skills are needed to get in there and access it. My task this morning has been made doubly difficult by the fact I have been unable to shut off the water coming from the water tank.. This is the bastard in question. With it turned fully right, or fully left, water keeps on coming. How and why would it do this? I am no valve expert, but I thought that this was a pretty simple device with not a lot to go wrong. Am I going to have to completely drain my water tank and swap it out? Just checking, but how many turns did you rotate the vale in trying to turn it off? I ask because Jeff was recently down to the boat on his own. He complained that he could get the water on. It transpired that he'd turned the valve about 1/4 turn which is the slack in the system. (Normally I do it of course). Once he'd realised there was a bit of stiction and it had to be rotated several complete turns, all was fine. But if you have rotated it several turns and the water still comes out, as said it has become gunged up with limescale The mighty Hudson has a cheap nasty gate valve fitted to it? Wanders off shaking his head.... |
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