Gravity Hot Water ???

[jaw]

Post copied from plumbing forum

Hi

Its now 11:05pm and I can't see the wood for the trees!

I have visited a customer today who wants to replace their old Ideal E type RS 50 with a more modern and efficient floor standing boiler on a fully pumped Y plan system (Obviously avoiding the possibilty of "pumping over"). The current system from what I can see is gravity HW and pumped CH. Thinking about it tonight, what I can't get me head around is the following:

The property is a bungalow. The boiler is in the garage and the existing HW (gravity?) flow pipe rises from the boiler into the loft space. It then travels horizontally before dropping down to the top connection of the hot water cylinder in the bathroom. The return pipe to the boiler is then visa versa from the bottom connection of the cylinder. How can gravity work in this situation when the pipes in effect go up, across and down in both directions? Or am I being totally thick !

My answer would be to convert the current system to a sealed system but am looking at all avenues at the moment

Any ideas welcome, Thanks

 

[lame plumber]

why? ...

 

[jaw]

why? ...

To get more coverage

 

[lame plumber]

didnt work did it

 

[happyflyer]

Post copied from plumbing forum

Hi

Its now 11:05pm and I can't see the wood for the trees!

I have visited a customer today who wants to replace their old Ideal E type RS 50 with a more modern and efficient floor standing boiler on a fully pumped Y plan system (Obviously avoiding the possibilty of "pumping over"). The current system from what I can see is gravity HW and pumped CH. Thinking about it tonight, what I can't get me head around is the following:

The property is a bungalow. The boiler is in the garage and the existing HW (gravity?) flow pipe rises from the boiler into the loft space. It then travels horizontally before dropping down to the top connection of the hot water cylinder in the bathroom. The return pipe to the boiler is then visa versa from the bottom connection of the cylinder. How can gravity work in this situation when the pipes in effect go up, across and down in both directions? Or am I being totally thick !

My answer would be to convert the current system to a sealed system but am looking at all avenues at the moment

Any ideas welcome, Thanks

Draw it and post it, it doesn't make any sense???? Not certain why you are worried, would you not be pumping those 22mm HWS F/R anyway, sealed system auto air vent in roof space etc etc, as someone says didn't work anyway unless by some miracle, there would be zero circulating head.