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LondonRascal

Independence - Updates | Maintenance & Care

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4 hours ago, SteveDuk said:

I don't know if you were seriously going to look at the chinese heaters but if you are this Faceache group has some good info in the Files section.

Thanks for that.

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Only been a few months - well okay, over 12 since I last posted to this thread. A bunch has happened in that time, but small bits here and there that have not really warranted a written update, leave aside a video.  Also I have found that making videos is not as easy when you've got to worry about stopping what you are doing to hold the camera, then carry on for a bit, then stop and so on ans so forth.

Still, recently the fresh water pump packed up and I came over to this very thread because I had remembered Stuart talking about what pump type he had fitted on his Trader, this lead me to go through all the paper work and original manuals onboard to find my one too had such a pump. A pump very different to the one fitted, which in turn had been replaced back in Plymouth prior to sailing her to the Broads.

So on to A.S.A.P Supplies who had the pump in stock and off to Beccles I went to get it. I am the first to praise the likes of Amazon for price and products, but A.S.A.P not only was the same price as I could get on Amazon, the best part was the helpful free advice they provide so it is not always the best thing to buy online..

Since I have fitted the new pump the issues with pressure, pump cycling and hot water fluctuations have all vanished. The only issue is the sheer noise the Par Max 4 emits. I do however have some ideas on how to isolate some of this, and the resonance through the bulkhead to which it is fitted.

Video of the process here:

 

 

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Welcome back Robin, some of the more experienced boaty types may have a good fix for the noisy jabsco pump but I have found 4 rubber exhaust silentblock bobbins are best. When fitted they have no direct metal to metal contact with the hull so should reduce the transmitted growl. Cheap as chips on Amazon, mount them on a piece of ply then screw the ply to the cladding.Hope it helps.

Paul.

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Spot on silent block bobbins will cure a resonance issue n pretty easy to fit too , that said they have already got isolation rubbers fitted so it shouldn't resonate .

Incidentally the Johnson pump is a 5 diaphragm pump hence the large chamber and should ideally be run in conjunction with an accumulator tank of the correct size and pressurised 2-3 psi less than the pump pressure .

Any water pump must never be mounted with the motor facing down in a vertical format as any internal leak will get back into the motor and bearings , sideways is fine as is any oriantation on a flat surface .

A simple ball valve introduce on the inlet side will combat the issue being able to isolate the water supply and very useful to be able to turn it off when leaving the boat for extending periods as it removes the possibility water running if a pressure realise valve , tap washer or pipe  fails aft of the pump , if it's taken care of with a pump turn of switch fitted to the boat already that also removes that risk .

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27 minutes ago, annv said:

Hi If pumps are installed horizontally they will have a longer life. John

which part, the motor or the flow horizontal or both?

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Hi Grendel The axis of the armature should ideally be horizontal this distributes the weight equally on both bearings while allowing any fluid to drain from drain hole keeping armature dry. John

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Hi Robin,

Good to see you're making progress with the freshwater system. Just a thought as I see that the pipes leading to and from the pump are translucent. That's not the usual Trader style and leads me to wonder whether the current siting of your pump was the original one. Normally the pipework is opaque and colour coded for hot (red) and cold (blue) water. The pipes are plastic on the inside and outside with a thin layer of metal sandwiched between. They can be bent into a suitable shape quite easily and they then hold their shape and position. I would be interested to see at what point the translucent feed pipe to the pump begins and whether there are signs of a pump having been fitted in that vicinity. It may be that a previous owner extended the pipework and, if it is the case, you may be able to deduce why that was or what other changes may have been made in that vicinity.

All the best,

Stuart

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