Hot water cylinder losing heat too fast

[picasso]

How long is the immersion heater and how tall is your cylinder ?

 

[HERTS P&D]

CHANGE THE VENT PIPE ASAP!

Andy

 

[Marky_Sparky]

It is 1500mm x 300mm foam lagged and the immersion is 27inch.

 

[JohnD]

having looked at your other pics, you have a lot more pipes that need lagging.

Are you sure the circulating pump is not sending water round? it can rob heat from the cylinder.

 

[picasso]

It is 1500mm x 300mm foam lagged and the immersion is 27inch.

So your not even heating up half the cylinder, even a 36" will do just over half, don't suppose there is a boss for a bottom entry immersion heater ?

 

[picasso]

Or you could just put the vent back the way it was and lag it, your not losing much heat through the pipework if its lagged and your problem is more likely the way your using the system (your only heating about 50 litres of the cylinder with an average temp of about 55c)

 

[hard-work]

Or you could just put the vent back the way it was and lag it, your not losing much heat through the pipework if its lagged and your problem is more likely the way your using the system (your only heating about 50 litres of the cylinder with an average temp of about 55c)

That is worth doing at the first step, then monitor. But thick lagging to ensure the walls of the pipe do not cool too much. The heat is being wasted because of water circulation inside one pipe, so not allowing the pipe walls to cool too much is essential.

 

[Deleted member 221031]

That is worth doing at the first step, then monitor. But thick lagging to ensure the walls of the pipe do not cool too much. The heat is being wasted because of water circulation inside one pipe, so not allowing the pipe walls to cool too much is essential.

Or fit a Navien combi. They are a really good alternative to a system set up

I have an Intergas at home with PDHW. It’s spectacular

 

[hard-work]

Wow. They would work well with a solar system. Both can take preheated hot water as the OP has.