'packaged' hot water cylinders.

Does anyone know who sells packaged (pump, valves, air removers etc already connected) hot water cylinders.
Any comments about them? I'm replacing my oil central heating with gas and moving the hot and cold tanks etc.
Thank you, Neil
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On Wed, 20 Aug 2003 19:14:03 +0000 (UTC), snipped-for-privacy@alumni.caltech.edu (Niel A. Farrow) wrote:

You might find yourself going for a system boiler which has the pump built into the boiler. Several of the condensing boiler manufacturers do this (e.g. Keston, MAN, ...) and it allows the boiler electronics to control the pump output to line up with the boiler output, giving better temperature control and economy. This doesn't tend to be done with external pumps, although in theory it could if the boiler and pump manufacturers co-operated.
Another thing to think about is whether the piping layout around the cylinder is convenient for your pipework arrangement in the location that the tank will go.
For example, my airing cupboard where the cylinder is located is rectangular (in plan view), with the door at one end of the long side. The cylinder sits at the other end of the rectangle - effectively in a U shape.
The original cylinder (of standard type) had the cold feed inlet pipe at 180 degrees relative to the heating coil pipes. This meant that it ended up in the back corner of the cupboard out of view and access. It was a problem on a couple of occasions when poorly done "professional" plumbing resulted in seepage from this fitting. The whole cylinder had to come out which was a major PITA.
When I replaced the cylinder, I ordered a custom one and specified all fittings to be placed within a 45 degree arc. As a result, I was able to organise the pipework in a much neater way.
I also fitted lever ball valves on every pipe connection apart from the vent at the top, and in effect around the motorised valves. This means that the motorised valves can be taken out when they fail without draining or even depressurising the system. The cylinder could be similarly isolated.
A packaged cylinder/valve arrangement may be OK, but to be honest, it is trivial to make your own construction as you want it to be, so I am not sure that it has that much value.
.andy
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As do Ariston. I assume you are talking about the boiler cylinder combination.
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I know DPS do a heat bank like this. You just put it in place and attach the boiler and the incoming mains cold in and hot out and wire up to the programmer. All internal wiring and plumbing is done. No need for external tanks.
Christian.
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