Replacing How Water Cylinder / Dual immersion

Need to replace a cylinder (direct) due to it being older than the ark. Its a really small cylinder and want to install a larger one to give more hot water. Airing cupboard has plenty of room.

Apart from altering pipework, any reason this could be a problem?

Also, the flat has storage heaters and the original cylinder has a dual type immersion, 1 boss on cylinder but it has two thermostats and two flying leads to switches. One switch has 'long' on the other has 'short' which I believe relates to the length of each part of the immersion? there soes not appear to be any timers relating to the switches, do you think one runs of the economy 7? If so should this be left on all the time? Are these the same size thread as normal immersions?

Or will it be better with the new cylinder to just use a normal immersion, one of the switches and maybe get a spark to wire a timer up to it?

Would be looking to put in a 1050 x 450 direct cylinder, what type of immersion should I get?

Hopefully this makes sense and you are able to advise!

Many thanks

If you go for an E7 direct cylinder then this will usually take 2 x 11" immersions, bottom and near top.

If you say you have storage heaters then it sounds as if the main immersion (old long one) could be on the E7 circuit that the storage heaters are on, so will only come on at night.

You could have a timer fitted just for the top booster element.

Get a sparks to advise.

Was hoping to ditch the E7 part on the circuit to the water, as its a pain! what with having to remember to turn on booster etc.

So was hoping to just us a normal immersion heater and wire it up to the 'short' non E7 cable left on 24/7 and have a timer to control it?

What do you think? Guess your answer will be to get a spark in to check and do this part?

Thanks guys

Why not use E7 on lower heater on sep. timer and use the top heater as normal 24 hours use, maybe with a timer? Save you on eleck bill.

Dan.