DannyC Posted December 28, 2018 Report Share Posted December 28, 2018 Hi everyone, Apologies if this is in the wrong section! So I emptied my water tank before going away for a few days at xmas. When I returned, I entered the boat and turned on the 12v system that powers the water pumps. The pump started marking a loudish buzzing noise, so I turned it off as I presumed that it was making the noise because there was no water in the tank to pump. Today I filled up my water tank and turned on the water pump. When I turned on the tap, no water appeared. The pump is still making the buzzing noise. Any ideas what the problem could be here? Thanks Dan Link to comment Share on other sites More sharing options...
Ian F B Posted December 28, 2018 Report Share Posted December 28, 2018 Possibly blocked filter or air lock,I sometimes have this problem with the pump to my Thetford.?? Link to comment Share on other sites More sharing options...
philjw Posted December 28, 2018 Report Share Posted December 28, 2018 Is there a stop cock before he pump which is not turned on? Did you drain the calorifier? I'd start by opening all of the cold taps then turn on the pump. That should sort out any air locks. If not then try removing the output side pipe from the pump to make sure the water is getting that far. If it is keep working forwards through the system. The question re calorifier is that it may need to fill before there is anything left to come through the taps. Open the shower or kitchen hot tap first to allow air in. Link to comment Share on other sites More sharing options...
Stilllearning Posted December 28, 2018 Report Share Posted December 28, 2018 A few thoughts after emptying the tank, did you turn off the tap between the tank and the pump, if there is one? (There should be one) is there a filter inline between tank and pump, and it it blocked? have you tried giving the pump a gentle whack with a soft hammer? It might be jammed and not functioning as it should. Link to comment Share on other sites More sharing options...
Momac Posted December 28, 2018 Report Share Posted December 28, 2018 7 minutes ago, DannyC said: Hi everyone, Apologies if this is in the wrong section! So I emptied my water tank before going away for a few days at xmas. When I returned, I entered the boat and turned on the 12v system that powers the water pumps. The pump started marking a loudish buzzing noise, so I turned it off as I presumed that it was making the noise because there was no water in the tank to pump. Today I filled up my water tank and turned on the water pump. When I turned on the tap, no water appeared. The pump is still making the buzzing noise. Any ideas what the problem could be here? Thanks Dan The pump should be capable of picking up the water from the tank despite some air in the pick up pipe. Possibly you need to leave the pump running a little longer to fill up the pipework and the calorifier If the pick up pipe is clear plastic you should be able to see if it full of water up to the pump. Link to comment Share on other sites More sharing options...
DannyC Posted December 28, 2018 Author Report Share Posted December 28, 2018 I turned on all the taps until there was no water coming out before I left for xmas. Would that have drainedd the calorifier? Link to comment Share on other sites More sharing options...
Stilllearning Posted December 28, 2018 Report Share Posted December 28, 2018 1 minute ago, DannyC said: I turned on all the taps until there was no water coming out before I left for xmas. Would that have drainedd the calorifier? Almost certainly Link to comment Share on other sites More sharing options...
DannyC Posted December 28, 2018 Author Report Share Posted December 28, 2018 Just to confirm - the pump is making noise event when the taps are off. I turned on all the taps and tried to see if water is coming through - the stock cock is turned on to allow for water flow, but it is difficult to see whether there is water flowing through the pipe. Link to comment Share on other sites More sharing options...
DannyC Posted December 28, 2018 Author Report Share Posted December 28, 2018 30 minutes ago, philjw said: Is there a stop cock before he pump which is not turned on? Did you drain the calorifier? I'd start by opening all of the cold taps then turn on the pump. That should sort out any air locks. If not then try removing the output side pipe from the pump to make sure the water is getting that far. If it is keep working forwards through the system. The question re calorifier is that it may need to fill before there is anything left to come through the taps. Open the shower or kitchen hot tap first to allow air in. Is the output side pipe the one that goes from the pump to the calorifier? Link to comment Share on other sites More sharing options...
DannyC Posted December 28, 2018 Author Report Share Posted December 28, 2018 Woah - so water is coming through now. I think it is fixed. Haha, this is a learning curve! Cheers all Link to comment Share on other sites More sharing options...
Iain_S Posted December 28, 2018 Report Share Posted December 28, 2018 1 hour ago, DannyC said: I turned on all the taps until there was no water coming out before I left for xmas. Would that have drainedd the calorifier? 1 hour ago, Stilllearning said: Almost certainly Have to disagree : almost certainly not. The hot outlet from the calorifier will be at the top. Water will cease to flow from the taps when the pump has moved air to the calorifier inlet, or before. Drainng the calorifier requires a drain cock at the bottom of the calorifier, on the inlet and after any non return valve. Link to comment Share on other sites More sharing options...
ditchcrawler Posted December 28, 2018 Report Share Posted December 28, 2018 1 hour ago, Stilllearning said: Almost certainly Definitely not Link to comment Share on other sites More sharing options...
Liam Posted December 28, 2018 Report Share Posted December 28, 2018 Moved to Boat Building & Maintenance Link to comment Share on other sites More sharing options...
Tony Brooks Posted December 28, 2018 Report Share Posted December 28, 2018 I noticed that everyone assumed a modern diaphragm type pump and in this case that was almost certainly correct. There may well be Stuart or Godwin systems around (maybe others) that use a centrifugal pump and they will not normally self prime if the pump ha s air in it. Those need a good blow into the tank filler with the breather blocked or a good suck on just one open tap with the pump running. Link to comment Share on other sites More sharing options...
Boater Sam Posted December 29, 2018 Report Share Posted December 29, 2018 (edited) 10 hours ago, Stilllearning said: Almost certainly No it would not, calorifiers empty from the top, fill from the bottom. Crossed with everyone else! Its not French plumbing!!!! Edited December 29, 2018 by Boater Sam Link to comment Share on other sites More sharing options...
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