Hobby 750 water problem.

[Bobndebs McKay]

Hi all, our hobby 750 fmse has come up with a snag. I have filled the water tank ( it was empty and clean) now the pump runs when I open a tap, but no water comes to the tap. I pulled the feed pipe out and primed the line with a bottle of water but to no avail, is there something obvious I am missing? It is a Shureflo Trailking 7 pump. Any advice appreciated. Thanks in advance.

 

[davejen]

Most likely an air -lock, try opening ALL taps, including the shower and try again, it can take some time but usually woks if nothing else is wrong
Cheers, Dave

 

[Bobndebs McKay]

Thanks Dave, I shall try it in the morning.

 

[Voyger1010]

it was empty and clean)

Hi, just a thought as I did my water in the motorhome the other week ( I always drain down over the winter) The pump ran on for a longish time due to the fact that I had drained down not only the fresh water tank, but the domestic hot water boiler as well and it took a while to refill that as well, so the pump kept running until it had pumped the boiler full of water as well. hope it helps
Cheers.

 

[Bobndebs McKay]

Thanks for that Voyager, that makes good sense to me. Cheers

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[Voyger1010]

that makes good sense to me.

No problem, hope it helps

 

[Sundowners]

our 'old van' would only bleed with ALL taps shut----then crack one open A LITTLE to allow air out then shut again to allow pressure to re-build---keep repeating this 'till all air is out-----(pump will stop within a few seconds of closing tap)-------this worked for us anyway

 

[Bobndebs McKay]

I have discovered a crack in the filter bowl housing, it being upstream from the pump, I reckon it's drawing air and cavitating, hence no water, no leak either. Ordered one off Amazon, will update when it arrives!!

 

[jonandshell]

I have discovered a crack in the filter bowl housing, it being upstream from the pump, I reckon it's drawing air and cavitating, hence no water, no leak either. Ordered one off Amazon, will update when it arrives!!

Very common that one!

Water left inside the filter freezes over winter and cracks it. We have a spare!

 

[Deleted member 29692]

When it happened on ours it turned out that the boiler frost protection had operated. The pump was trying to fill the boiler as a priority, so nothing getting to the taps, the water was going straight out of the dump valve so the boiler wasn't filling so the pump was running continuously. Didn't figure it out until I went outside and noticed the big puddle under the van.

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[vectian]

My hobby 600 takes ages for the water to pump through and also fills the truma water heater at the same time. As the others say make sure the dump valve is closed and just keep trying. The Truma heating may need to be switched on electrically in order for the dump valve to stay closed at first

 

[Wildman]

the correct way to bleed the pipes is the same as per brakes, close all tapes then open one at a time until the water flows without spluttering, starting with the on nearest to the pump then close it and move on to the next. Remember it takes a while for the hot water tank to fill befor water gets to the taps.

 

[Bobndebs McKay]

Hi all, success!! I received my new filter assembly today, it took literally 10 minutes to remove and replace the existing one. I then started to run the pump with the drain open ( nearest point). I primed the feed line from the tank with a small plastic bottle of water, then blew the water down the line, it filled the filter bowl and set the pump working properly. There was a distinct change of tone in the pump so I knew it was drawing water at this stage. I closed the drain and opened the kitchen sink tap which spluttered for a few minutes and then started to produce water which I allowed to run till it flowed steady. I repeated the process then for the vanity unit sink and shower in order. Result, all the taps and shower are now producing water on demand, the central heating and hot water boiler are working and I am one happy Teddy!!
I hope this information may be of some use to others. Cheers all.

 

[Voyger1010]

Good job Bob! Now enjoy

 

[Peter Waller]

Hi do you still have your Hobby 750 and if you do have you had any problems? I started a thread where all 750 owners can communicate and help each other out. Thx Pete