shaky1105

[Doggit]

It's filling from the cold storage tank on top of the hot water cylinder, so it's going to be low pressure, not mains pressure for the hot water take off. But Shakey wanted the shower to work off of the new water heater (whatever that would be) not the old combi, so this would really need fitting in the loft to give a god head of water pressure, even for the kitchen taps, certainly no good in a bungalow.

 

[muggles]

You can use a combi as system boiler. In most homes the only high pressure outlet you need is the shower. Have this off the combi from the cold water mains. Fit a `combination cylinder`. That is a hot water water cylinder and cold water tank in one unit. It saves a lot of space. All other hot outlets can be off this. Take the cold taps off this as well. You can get some with a large cold tank section. It operates on low pressure and is far better than an unvented cylinder. It gives you stored water and the shower is not affected when the dishwasher kicks in.

If you have a small cold tank section, fit in a 3/4" ballcock and 22mm cold feed to it. It will fill fast.

So much drivel in one post. This has to be a wind-up

 

[hard-work]

What's hard-work on about that's a thermal store or combi store still mains pressure not low pressure ?

Find out what a low pressure combination cylinder is.

 

[hard-work]

It's filling from the cold storage tank on top of the hot water cylinder, so it's going to be low pressure, not mains pressure for the hot water take off. But Shakey wanted the shower to work off of the new water heater (whatever that would be) not the old combi, so this would really need fitting in the loft to give a god head of water pressure, even for the kitchen taps, certainly no good in a bungalow.

As long as the combination cylinder's water cold water section is higher than the bath it will work well. The shower will be mains pressure from the combi boiler.

 

[AGAS]

you have a 3 bed bungalow ( which is not big at all ) with a 30kw combi with hot water pipework runs that isn't going to be that bad with heat loss , haven't you thought that your boiler isn't actually producing that hot water in the first place . I've worked in loads of 2 and 3 bed bungalows with that set up .
just giving you options OP

 

[hard-work]

you have a 3 bed bungalow ( which is not big at all ) with a 30kw combi with hot water pipework runs that isn't going to be that bad with heat loss , haven't you thought that your boiler isn't actually producing that hot water in the first place .

uh?

 

[AGAS]

uh?

whats up you need to stop dribbling into your dinner now wipe your mouth and try explain your comment

OP original problem
The pipes are in the concrete floor and the hot water isn't really that hot by the time it gets to the shower or the kitchen taps. The boiler has just been serviced by BG and the fitter said it's working perfectly.


Read more: https://www.diynot.com/diy/threads/...or-central-heating-only.485552/#ixzz4nDuJ78vh

deal with the problem not add to the problems and extra costs
now do you think the BG service included getting his temp difference clamps out

 

[AGAS]

hey hardwork , you want to go there, I'm like a dog with a bone , and i have patience

 

[PullerGas]

It's because Shakey1105 had probems with the hot water getting cold on long pipe runs, and was intending to install a secondary water heater nearer the kitchen. Obviously, he has a right to do what he wants, but some members felt it was utter stupidity, and when one poster tried to suggest a solution based on what Shakey wanted, all hell got let lose.

It's called a Dead Leg by us Pros.

 

[PullerGas]

hey hardwork , you want to go there, I'm like a dog with a bone , and i have patience

Oh ignore hard on AG, he's a*******

 

[hard-work]

As a general note. Using a combi boiler for a high pressure show only and using it to heat a low pressure combination cylinder with a 3/4" ballcock and 22mm cold water mains supply for the rest of the hot water is an excellent way. The 3/4" ballcock will ensure the integral hot water tank will be filled quickly. It is cheap, safe and reliable.

 

[bernardgreen]

It is cheap, safe and reliable.

and thus less work for G3 plumbers.

Using a combi boiler for a high pressure shower only

Run mains pressure water through a second coil in the top of the low pressures cylinder for the shower. Avoids the need for a combi and the complications / compromises that come with a combi.

An alternative to a coil inside the cylinder ( which reduces water volume ) is a coil(s) wound around the outside of the cylinder ( inside the insulation ) and thermally bonded to the copper of the cylinder.

 

[picasso]

Why has @hard-work posted a picture of a thermal store and are now talking about low pressure coming from a fortic cylinder ?

 

[Dan Robinson]

Why has @hard-work posted a picture of a thermal store and are now talking about low pressure coming from a fortic cylinder ?

Because he is a tool of the highest order.

Between him and Blowhardgreen going on about custom cylinders the poor public will have no idea how to do a job properly.

Blowhard seems to think that G3 plumbers are a single roll vocation

 

[picasso]

Ta